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Add array methods: findIndex, reduce, some, every (#49)

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This commit is contained in:
Igor
2018-03-25 13:13:53 +02:00
committed by Daniel Wirtz
parent 38a025950e
commit 710fcefd72
6 changed files with 2949 additions and 4 deletions
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50
std/assembly/array.ts
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@ -25,6 +25,30 @@ export class Array<T> {
this.__capacity = this.__length = capacity;
}
every(callbackfn: (element: T, index: i32, array: Array<T>) => bool): bool {
var toIndex: i32 = this.__length;
var i: i32 = 0;
while (i < toIndex && i < this.__length) {
if (!callbackfn(load<T>(this.__memory + <usize>i * sizeof<T>()), i, this)) {
return false;
}
i += 1;
}
return true;
}
findIndex(predicate: (element: T, index: i32, array: Array<T>) => bool): i32 {
var toIndex: i32 = this.__length;
var i: i32 = 0;
while (i < toIndex && i < this.__length) {
if (predicate(load<T>(this.__memory + <usize>i * sizeof<T>()), i, this)) {
return i;
}
i += 1;
}
return -1;
}
get length(): i32 {
return this.__length;
}
@ -129,6 +153,20 @@ export class Array<T> {
return load<T>(this.__memory + <usize>--this.__length * sizeof<T>());
}
reduce<U>(
callbackfn: (previousValue: U, currentValue: T, currentIndex: i32, array: Array<T>) => U,
initialValue: U
): U {
var accumulator: U = initialValue;
var toIndex: i32 = this.__length;
var i: i32 = 0;
while (i < toIndex && i < this.__length) {
accumulator = callbackfn(accumulator, load<T>(this.__memory + <usize>i * sizeof<T>()), i, this);
i += 1;
}
return accumulator;
}
shift(): T {
if (this.__length < 1) {
throw new RangeError("Array is empty"); // return changetype<T>(0) ?
@ -148,6 +186,18 @@ export class Array<T> {
return element;
}
some(callbackfn: (element: T, index: i32, array: Array<T>) => bool): bool {
var toIndex: i32 = this.__length;
var i: i32 = 0;
while (i < toIndex && i < this.__length) {
if (callbackfn(load<T>(this.__memory + <usize>i * sizeof<T>()), i, this)) {
return true;
}
i += 1;
}
return false;
}
unshift(element: T): i32 {
var oldCapacity = this.__capacity;
if (this.__length == oldCapacity) {