87 lines
1.9 KiB
TypeScript
87 lines
1.9 KiB
TypeScript
function pick <O extends object, K extends keyof O> (object: O, keys: K[]): Pick<O, K> {
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const result: any = {}
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for (const key of keys) {
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if (Object.prototype.hasOwnProperty.call(object, key)) {
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result[key] = object[key]
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}
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}
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return result
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}
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function omit <O extends object, K extends keyof O> (object: O, keys: K[]): Exclude<O, K> {
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const result: any = {}
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const keysSet = new Set(keys) as Set<string>
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for (const [ key, value ] of Object.entries(object)) {
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if (keysSet.has(key)) continue
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result[key] = value
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}
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return result
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}
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function objectKeysTyped <O extends object, K extends keyof O> (object: O): K[] {
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return (Object.keys(object) as K[])
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}
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function getKeys <O extends object, K extends keyof O> (object: O, keys: K[]): K[] {
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return (Object.keys(object) as K[]).filter(k => keys.includes(k))
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}
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function hasKey <T extends object> (obj: T, k: keyof any): k is keyof T {
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return k in obj
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}
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function sortObjectComparator (key: string, order: 'asc' | 'desc') {
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return (a: any, b: any) => {
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if (a[key] < b[key]) {
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return order === 'asc' ? -1 : 1
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}
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if (a[key] > b[key]) {
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return order === 'asc' ? 1 : -1
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}
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return 0
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}
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}
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function shallowCopy <T> (o: T): T {
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return Object.assign(Object.create(Object.getPrototypeOf(o)), o)
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}
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function simpleObjectsDeepEqual (a: any, b: any) {
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if (a === b) return true
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if (typeof a !== 'object' || typeof b !== 'object' || a === null || b === null) {
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return false
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}
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const keysA = Object.keys(a)
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const keysB = Object.keys(b)
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if (keysA.length !== keysB.length) return false
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for (const key of keysA) {
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if (!keysB.includes(key)) return false
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if (!simpleObjectsDeepEqual(a[key], b[key])) return false
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}
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return true
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}
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export {
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pick,
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omit,
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objectKeysTyped,
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getKeys,
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hasKey,
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shallowCopy,
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sortObjectComparator,
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simpleObjectsDeepEqual
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}
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