68 lines
1.6 KiB
TypeScript
68 lines
1.6 KiB
TypeScript
import Vue from 'vue'
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export default abstract class Lists {
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static last<T>(list: T[]) {
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return list[list.length - 1]
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}
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static getIndex<T>(list: T[], where: (val: T) => boolean) {
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for (let i = list.length - 1; i >= 0; i--){
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if (where(list[i])) {
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return i
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}
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}
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return list.length
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}
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static setAt<T>(list: T[], id: number, val: T) {
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return Vue.set(list, id, val)
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}
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static setFirst<T>(list: T[], where: (val: T) => boolean, val: T) {
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return this.setAt(list, this.getIndex(list, where), val)
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}
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static setFirstBy<T, U>(list: T[], mapper: (val: T) => U, key: U, val: T) {
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return this.setFirst(list, e => mapper(e) === key, val)
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}
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static removeAt<T>(list: T[], id: number) {
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list.splice(id, 1)
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}
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static removeFrom<T>(list: T[], start: number) {
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list.splice(start)
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}
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static removeFirst<T>(list: T[], where: (val: T) => boolean) {
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this.removeAt(list, this.getIndex(list, where))
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}
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static removeFirstBy<T, U>(list: T[], mapper: (val: T) => U, val: U) {
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this.removeFirst(list, e => mapper(e) === val)
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}
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static pushAll<T>(list: T[], elems: T[]) {
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list.push.apply(list, elems)
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}
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static clear<T>(list: T[]) {
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list.splice(0, list.length)
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}
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static for<T>(list: T[], action: (val: T, id: number, list: T[]) => void) {
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for (let i = 0; i < list.length; i++){
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action(list[i], i, list)
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}
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}
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static sort<T, U>(list: T[], mapper: (val: T) => U, comparer: (a: U, b: U) => number) {
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return list.sort((a, b) => comparer(mapper(a), mapper(b)))
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}
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static stringCompare(a: string, b: string) {
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return ('' + a).localeCompare(b)
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}
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} |