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Copy patharray.ts
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129 lines (105 loc) · 3.72 KB
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import {infinity, isArray, mathMax, mathMin, size} from './other.ts';
import {EMPTY_STRING} from './strings.ts';
export const arrayNew = <Value>(
size: number,
cb: (index: number) => Value,
): Value[] => arrayMap(new Array(size).fill(0), (_, index) => cb(index));
export const arrayHas = <Value>(
array: readonly Value[],
value: unknown,
): value is Value => array.includes(value as Value);
export const arrayIndexOf = <Value>(array: Value[], value: Value): number =>
array.indexOf(value);
export const arrayEvery = <Value>(
array: readonly Value[],
cb: (value: Value, index: number) => boolean | 0 | 1,
): boolean => array.every(cb);
export const arrayIsEqual = (
array1: readonly unknown[],
array2: readonly unknown[],
): boolean =>
size(array1) === size(array2) &&
arrayEvery(array1, (value1, index) => array2[index] === value1);
export const arrayOrValueEqual = (value1: any, value2: any): boolean =>
isArray(value1) && isArray(value2)
? arrayIsEqual(value1, value2)
: value1 === value2;
export const arrayIsSorted = <Value>(
array: Value[],
sorter: (value1: Value, value2: Value) => number,
): boolean =>
arrayEvery(
array,
(value, index) => index == 0 || sorter(array[index - 1], value) <= 0,
);
export const arraySort = <Value>(
array: Value[],
sorter?: (value1: Value, value2: Value) => number,
): Value[] => array.sort(sorter);
export const arrayForEach = <Value>(
array: {forEach: (cb: (value: Value, index: number) => void) => void},
cb: (value: Value, index: number) => void,
): void => array.forEach(cb);
export const arrayJoin = (array: (string | number)[], sep = EMPTY_STRING) =>
array.join(sep);
export const arrayMap = <Value, Return>(
array: readonly Value[],
cb: (value: Value, index: number, array: readonly Value[]) => Return,
): Return[] => array.map(cb);
export const arraySum = (array: number[]): number =>
arrayReduce<number, number>(array, (i, j) => i + j, 0);
export const arrayMax = (array: number[]): number =>
arrayReduce<number, number>(
array,
(maximum, value) => mathMax(maximum, value),
-infinity,
);
export const arrayMin = (array: number[]): number =>
arrayReduce<number, number>(
array,
(minimum, value) => mathMin(minimum, value),
infinity,
);
export const arrayReduce = <Value, Result>(
array: Value[],
cb: (previous: Result, current: Value) => Result,
initial: Result,
): Result => array.reduce(cb, initial);
export const arrayFilter: {
<Value, FilteredValue extends Value>(
array: Value[],
cb: (value: Value, index: number, array: Value[]) => value is FilteredValue,
): FilteredValue[];
<Value>(
array: Value[],
cb: (value: Value, index: number, array: Value[]) => boolean,
): Value[];
} = <Value>(
array: Value[],
cb: (value: Value, index: number, array: Value[]) => boolean,
): Value[] => array.filter(cb);
export const arrayFind = <Value>(
array: Value[],
cb: (value: Value, index: number) => boolean,
): Value | undefined => array.find(cb);
export const arrayFindIndex = <Value>(
array: Value[],
cb: (value: Value, index: number) => boolean,
): number => array.findIndex(cb);
export const arrayClear = <Value>(array: Value[], to = size(array)): Value[] =>
array.splice(0, to);
export const arrayPush = <Value>(array: Value[], ...values: Value[]): number =>
array.push(...values);
export const arrayPop = <Value>(array: Value[]): Value | undefined =>
array.pop();
export const arrayUnshift = <Value>(
array: Value[],
...values: Value[]
): number => array.unshift(...values);
export const arrayShift = <Value>(array: Value[]): Value | undefined =>
array.shift();
export const arrayWith = <Value>(
array: Value[],
index: number,
value: Value,
): Value[] => array.with(index, value);