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https://github.com/fluencelabs/jsonpath
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README.md - update javascript example
This commit is contained in:
freestrings
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163
README.md
163
README.md
@ -69,39 +69,67 @@ const jsonpath = require('jsonpath-rs');
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```javascript
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let jsonObj = {
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"school": {
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"friends": [{"id": 0}, {"id": 1}]
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},
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"friends": [{"id": 0}, {"id": 1}]
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"school": {
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"friends": [
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{"name": "친구1", "age": 20},
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{"name": "친구2", "age": 20}
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]
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},
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"friends": [
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{"name": "친구3", "age": 30},
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{"name": "친구4"}
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]
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};
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let ret = [{"id": 0}, {"id": 0}];
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let a = jsonpath.select(JSON.stringify(jsonObj), "$..friends[0]");
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let b = jsonpath.select(jsonObj, "$..friends[0]");
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let ret = [
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{"name": "친구3", "age": 30},
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{"name": "친구1", "age": 20}
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];
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let selectAsString = jsonpath.select(JSON.stringify(jsonObj), '$..friends[0]');
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let selectAsObj = jsonpath.select(jsonObj, '$..friends[0]');
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console.log(
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JSON.stringify(ret) == JSON.stringify(a),
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JSON.stringify(a) == JSON.stringify(b)
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JSON.stringify(ret) == JSON.stringify(selectAsString),
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JSON.stringify(ret) == JSON.stringify(selectAsObj)
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);
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// => true, true
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```
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### javascript - jsonpath.compile(jsonpath: string)
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```javascript
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let template = jsonpath.compile("$..friends[0]");
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let template = jsonpath.compile('$..friends[0]');
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let jsonObj = {
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"school": {
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"friends": [ {"id": 0}, {"id": 1} ]
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"friends": [
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{"name": "친구1", "age": 20},
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{"name": "친구2", "age": 20}
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]
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},
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"friends": [ {"id": 0}, {"id": 1} ]
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"friends": [
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{"name": "친구3", "age": 30},
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{"name": "친구4"}
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]
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};
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let ret = JSON.stringify([ {"id": 0}, {"id": 0} ]);
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let ret = [
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{"name": "친구3", "age": 30},
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{"name": "친구1", "age": 20}
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];
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// 1. read as json object
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console.log(JSON.stringify(template(jsonObj)) == ret);
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// 2. read as json string
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console.log(JSON.stringify(template(JSON.stringify(jsonObj))) == ret);
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let selectAsString = template(JSON.stringify(jsonObj));
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let selectAsObj = template(jsonObj);
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console.log(
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JSON.stringify(ret) == JSON.stringify(selectAsString),
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JSON.stringify(ret) == JSON.stringify(selectAsObj)
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);
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// => true, true
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let jsonObj2 = {
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"school": {
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@ -110,15 +138,23 @@ let jsonObj2 = {
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{"name": "Vincent Cannon"}
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]
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},
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"friends": [ {"id": 0}, {"id": 1} ]
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"friends": [ {"age": 30}, {"age": 40} ]
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};
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let ret2 = JSON.stringify([ {"id": 0}, {"name": "Millicent Norman"} ]);
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let ret2 = [
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{"age": 30},
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{"name": "Millicent Norman"}
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];
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// 1. read as json object
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console.log(JSON.stringify(template(jsonObj2)) == ret2);
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// 2. read as json string
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console.log(JSON.stringify(template(JSON.stringify(jsonObj2))) == ret2);
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let selectAsString2 = template(JSON.stringify(jsonObj2));
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let selectAsObj2 = template(jsonObj2);
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console.log(
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JSON.stringify(ret2) == JSON.stringify(selectAsString2),
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JSON.stringify(ret2) == JSON.stringify(selectAsObj2)
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);
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// => true, true
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```
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### javascript - jsonpath.selector(json: string|object)
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@ -126,23 +162,40 @@ console.log(JSON.stringify(template(JSON.stringify(jsonObj2))) == ret2);
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```javascript
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let jsonObj = {
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"school": {
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"friends": [{"id": 0}, {"id": 1}]
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"friends": [
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{"name": "친구1", "age": 20},
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{"name": "친구2", "age": 20}
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]
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},
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"friends": [{"id": 0},{"id": 1}]
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"friends": [
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{"name": "친구3", "age": 30},
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{"name": "친구4"}
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]
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};
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let ret1 = JSON.stringify([ {"id": 0}, {"id": 0} ]);
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let ret2 = JSON.stringify([ {"id": 1}, {"id": 1} ]);
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let ret1 = [
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{"name": "친구3", "age": 30},
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{"name": "친구1", "age": 20}
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];
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let ret2 = [
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{"name": "친구4"},
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{"name": "친구2", "age": 20}
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];
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// 1. read as json object
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let selector = jsonpath.selector(jsonObj);
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console.log(JSON.stringify(selector("$..friends[0]")) == ret1);
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console.log(JSON.stringify(selector("$..friends[1]")) == ret2);
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// or as json string
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// let selector = jsonpath.selector(JSON.stringify(jsonObj));
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// 2. read as json string
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let selector = jsonpath.selector(JSON.stringify(jsonObj));
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console.log(JSON.stringify(selector("$..friends[0]")) == ret1);
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console.log(JSON.stringify(selector("$..friends[1]")) == ret2);
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let select1 = selector('$..friends[0]');
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let select2 = selector('$..friends[1]');
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console.log(
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JSON.stringify(ret1) == JSON.stringify(select1),
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JSON.stringify(ret2) == JSON.stringify(select2)
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);
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// => true, true
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```
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### javascript - alloc_json, dealloc_json
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@ -154,34 +207,52 @@ wasm-bindgen은 Javascript와 Webassembly 간 값을 주고받을 때 JSON 객
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Since wasm-bindgen converts JSON objects to String when exchanging values between Javascript and Webassembly, it is helpful to create repeated Json objects in Webassembly area.
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```javascript
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const jsonpath = require('@nodejs/jsonpath-wasm');
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let jsonObj = {
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"school": {
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"friends": [{"id": 0}, {"id": 1}]
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"friends": [
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{"name": "친구1", "age": 20},
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{"name": "친구2", "age": 20}
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]
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},
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"friends": [{"id": 0},{"id": 1}]
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"friends": [
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{"name": "친구3", "age": 30},
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{"name": "친구4"}
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]
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};
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// allocate jsonObj in webassembly
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let ptr = jsonpath.alloc_json(jsonObj);
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// `0` is invalid pointer
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if(ptr == 0) {
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console.error('invalid ptr');
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}
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let path = '$..friends[0]';
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let template = jsonpath.compile(path);
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let selector = jsonpath.selector(jsonObj);
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let ptr = jsonpath.alloc_json(jsonObj);
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if(ptr == 0) console.error('invalid ptr'); // `0` is invalid pointer
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let selector2 = jsonpath.selector(ptr);
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// create selector as pointer
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let ptrSelector = jsonpath.selector(ptr);
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let ret1 = selector(path)
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let ret2 = selector2(path)
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let ret2 = ptrSelector(path)
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let ret3 = template(jsonObj);
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// select as pointer
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let ret4 = template(ptr);
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let ret5 = jsonpath.select(jsonObj, path);
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// select as pointer
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let ret6 = jsonpath.select(ptr, path);
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console.log(
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JSON.stringify(ret1) == JSON.stringify(ret2),// true
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JSON.stringify(ret1) == JSON.stringify(ret3),// true
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JSON.stringify(ret1) == JSON.stringify(ret4),// true
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JSON.stringify(ret1) == JSON.stringify(ret5),// true
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JSON.stringify(ret1) == JSON.stringify(ret6));// true
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JSON.stringify(ret1) == JSON.stringify(ret2),
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JSON.stringify(ret1) == JSON.stringify(ret3),
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JSON.stringify(ret1) == JSON.stringify(ret4),
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JSON.stringify(ret1) == JSON.stringify(ret5),
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JSON.stringify(ret1) == JSON.stringify(ret6));
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// => true true true true true
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jsonpath.dealloc_json(ptr);
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```
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121
nodejs/README.md
121
nodejs/README.md
@ -24,39 +24,67 @@ Build from source instead of using pre-built binary, and if Rust is not installe
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```javascript
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let jsonObj = {
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"school": {
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"friends": [{"id": 0}, {"id": 1}]
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},
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"friends": [{"id": 0}, {"id": 1}]
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"school": {
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"friends": [
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{"name": "친구1", "age": 20},
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{"name": "친구2", "age": 20}
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]
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},
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"friends": [
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{"name": "친구3", "age": 30},
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{"name": "친구4"}
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]
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};
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let ret = [{"id": 0}, {"id": 0}];
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let a = jsonpath.select(JSON.stringify(jsonObj), "$..friends[0]");
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let b = jsonpath.select(jsonObj, "$..friends[0]");
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let ret = [
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{"name": "친구3", "age": 30},
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{"name": "친구1", "age": 20}
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];
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let selectAsString = jsonpath.select(JSON.stringify(jsonObj), '$..friends[0]');
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let selectAsObj = jsonpath.select(jsonObj, '$..friends[0]');
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console.log(
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JSON.stringify(ret) == JSON.stringify(a),
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JSON.stringify(a) == JSON.stringify(b)
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JSON.stringify(ret) == JSON.stringify(selectAsString),
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JSON.stringify(ret) == JSON.stringify(selectAsObj)
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);
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// => true, true
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```
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### jsonpath.compile(jsonpath: string)
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```javascript
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let template = jsonpath.compile("$..friends[0]");
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let template = jsonpath.compile('$..friends[0]');
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let jsonObj = {
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"school": {
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"friends": [ {"id": 0}, {"id": 1} ]
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"friends": [
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{"name": "친구1", "age": 20},
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{"name": "친구2", "age": 20}
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]
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},
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"friends": [ {"id": 0}, {"id": 1} ]
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"friends": [
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{"name": "친구3", "age": 30},
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{"name": "친구4"}
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]
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};
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let ret = JSON.stringify([ {"id": 0}, {"id": 0} ]);
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let ret = [
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{"name": "친구3", "age": 30},
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{"name": "친구1", "age": 20}
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];
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// 1. read as json object
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console.log(JSON.stringify(template(jsonObj)) == ret);
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// 2. read as json string
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console.log(JSON.stringify(template(JSON.stringify(jsonObj))) == ret);
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let selectAsString = template(JSON.stringify(jsonObj));
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let selectAsObj = template(jsonObj);
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console.log(
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JSON.stringify(ret) == JSON.stringify(selectAsString),
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JSON.stringify(ret) == JSON.stringify(selectAsObj)
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);
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// => true, true
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let jsonObj2 = {
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"school": {
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@ -65,15 +93,23 @@ let jsonObj2 = {
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{"name": "Vincent Cannon"}
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]
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},
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"friends": [ {"id": 0}, {"id": 1} ]
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"friends": [ {"age": 30}, {"age": 40} ]
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};
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let ret2 = JSON.stringify([ {"id": 0}, {"name": "Millicent Norman"} ]);
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let ret2 = [
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{"age": 30},
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{"name": "Millicent Norman"}
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];
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// 1. read as json object
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console.log(JSON.stringify(template(jsonObj2)) == ret2);
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// 2. read as json string
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console.log(JSON.stringify(template(JSON.stringify(jsonObj2))) == ret2);
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let selectAsString2 = template(JSON.stringify(jsonObj2));
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let selectAsObj2 = template(jsonObj2);
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console.log(
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JSON.stringify(ret2) == JSON.stringify(selectAsString2),
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JSON.stringify(ret2) == JSON.stringify(selectAsObj2)
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);
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// => true, true
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```
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### jsonpath.selector(json: string|object)
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@ -81,21 +117,38 @@ console.log(JSON.stringify(template(JSON.stringify(jsonObj2))) == ret2);
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```javascript
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let jsonObj = {
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"school": {
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"friends": [{"id": 0}, {"id": 1}]
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"friends": [
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{"name": "친구1", "age": 20},
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{"name": "친구2", "age": 20}
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]
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},
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"friends": [{"id": 0},{"id": 1}]
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"friends": [
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{"name": "친구3", "age": 30},
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{"name": "친구4"}
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]
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};
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let ret1 = JSON.stringify([ {"id": 0}, {"id": 0} ]);
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let ret2 = JSON.stringify([ {"id": 1}, {"id": 1} ]);
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let ret1 = [
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{"name": "친구3", "age": 30},
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{"name": "친구1", "age": 20}
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];
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let ret2 = [
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{"name": "친구4"},
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{"name": "친구2", "age": 20}
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];
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// 1. read as json object
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let selector = jsonpath.selector(jsonObj);
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console.log(JSON.stringify(selector("$..friends[0]")) == ret1);
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console.log(JSON.stringify(selector("$..friends[1]")) == ret2);
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// or as json string
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// let selector = jsonpath.selector(JSON.stringify(jsonObj));
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// 2. read as json string
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let selector = jsonpath.selector(JSON.stringify(jsonObj));
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console.log(JSON.stringify(selector("$..friends[0]")) == ret1);
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console.log(JSON.stringify(selector("$..friends[1]")) == ret2);
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let select1 = selector('$..friends[0]');
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let select2 = selector('$..friends[1]');
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console.log(
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JSON.stringify(ret1) == JSON.stringify(select1),
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JSON.stringify(ret2) == JSON.stringify(select2)
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);
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// => true, true
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```
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2
nodejs/package-lock.json
generated
2
nodejs/package-lock.json
generated
@ -1,6 +1,6 @@
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{
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"name": "jsonpath-rs",
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"version": "0.1.1",
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"version": "0.1.5",
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"lockfileVersion": 1,
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"requires": true,
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"dependencies": {
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