29 lines
699 B
TypeScript
29 lines
699 B
TypeScript
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export function dedupe<T>(arr: Array<T>): Array<T> {
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return arr.filter((value, index, self) => self.indexOf(value) === index)
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}
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export function dedupeBy<T>(
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arr: Array<T>,
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transform: (item: T) => any
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): Array<T> {
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return arr.filter(
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(value, index, self) =>
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self.map(transform).indexOf(transform(value)) === index
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)
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}
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export function ensureArray<T>(value: T | T[]): T[] {
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return Array.isArray(value) ? value : [value]
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}
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export function flatten<T>(arrays: T[][]): T[] {
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return [].concat.apply([], arrays)
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}
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export function equal(arr1: any[], arr2: any[]): boolean {
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return (
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JSON.stringify(arr1.concat([]).sort()) ===
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JSON.stringify(arr2.concat([]).sort())
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)
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}
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