diff --git a/cdn/radash.esm.js b/cdn/radash.esm.js index f97132fa..1b79b53d 100644 --- a/cdn/radash.esm.js +++ b/cdn/radash.esm.js @@ -170,10 +170,13 @@ const objectify = (array, getKey, getValue = (item) => item) => { ); }; const select = (array, mapper, condition) => { - return array.reduce((acc, item) => { - if (!condition(item)) + if (!array) + return []; + return array.reduce((acc, item, index) => { + if (!condition(item, index)) return acc; - return [...acc, mapper(item)]; + acc.push(mapper(item, index)); + return acc; }, []); }; const max = (array, getter) => { diff --git a/cdn/radash.js b/cdn/radash.js index bf9fba9e..6f09ca1b 100644 --- a/cdn/radash.js +++ b/cdn/radash.js @@ -173,10 +173,13 @@ var radash = (function (exports) { ); }; const select = (array, mapper, condition) => { - return array.reduce((acc, item) => { - if (!condition(item)) + if (!array) + return []; + return array.reduce((acc, item, index) => { + if (!condition(item, index)) return acc; - return [...acc, mapper(item)]; + acc.push(mapper(item, index)); + return acc; }, []); }; const max = (array, getter) => { diff --git a/cdn/radash.min.js b/cdn/radash.min.js index 2e58689c..daba32d2 100644 --- a/cdn/radash.min.js +++ b/cdn/radash.min.js @@ -1 +1 @@ -var radash=function(i){"use strict";const $=t=>!!t&&t.constructor===Symbol,N=t=>!!t&&t.constructor===Array,_=t=>!!t&&t.constructor===Object,z=t=>t==null||typeof t!="object"&&typeof t!="function",p=t=>!!(t&&t.constructor&&t.call&&t.apply),D=t=>typeof t=="string"||t instanceof String,F=t=>h(t)&&t%1===0,R=t=>h(t)&&t%1!==0,h=t=>{try{return Number(t)===t}catch{return!1}},P=t=>Object.prototype.toString.call(t)==="[object Date]",Z=t=>{if(t===!0||t===!1||t==null)return!0;if(h(t))return t===0;if(P(t))return isNaN(t.getTime());if(p(t)||$(t))return!1;const e=t.length;if(h(e))return e===0;const n=t.size;return h(n)?n===0:Object.keys(t).length===0},S=(t,e)=>{if(Object.is(t,e))return!0;if(t instanceof Date&&e instanceof Date)return 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diff --git a/package.json b/package.json index e5995a86..e5f6141e 100644 --- a/package.json +++ b/package.json @@ -1,6 +1,6 @@ { "name": "radash", - "version": "10.2.0", + "version": "10.3.0", "description": "Functional utility library - modern, simple, typed, powerful", "main": "dist/cjs/index.cjs", "module": "dist/esm/index.mjs", diff --git a/src/array.ts b/src/array.ts index 88a7d68b..62025d23 100644 --- a/src/array.ts +++ b/src/array.ts @@ -217,16 +217,19 @@ export const objectify = ( * Select performs a filter and a mapper inside of a reduce, * only iterating the list one time. * - * Ex. select([1, 2, 3, 4], x => x*x, x > 2) == [9, 16] + * @example + * select([1, 2, 3, 4], x => x*x, x > 2) == [9, 16] */ export const select = ( array: readonly T[], - mapper: (item: T) => K, - condition: (item: T) => boolean + mapper: (item: T, index: number) => K, + condition: (item: T, index: number) => boolean ) => { - return array.reduce((acc, item) => { - if (!condition(item)) return acc - return [...acc, mapper(item)] + if (!array) return [] + return array.reduce((acc, item, index) => { + if (!condition(item, index)) return acc + acc.push(mapper(item, index)) + return acc }, [] as K[]) } diff --git a/src/tests/array.test.ts b/src/tests/array.test.ts index 7ad6f754..2bbf4fb1 100644 --- a/src/tests/array.test.ts +++ b/src/tests/array.test.ts @@ -250,6 +250,24 @@ describe('array module', () => { }) describe('select function', () => { + test('does not fail on bad input', () => { + assert.deepEqual( + _.select( + null as unknown as any[], + x => x, + x => x + ), + [] + ) + assert.deepEqual( + _.select( + undefined as unknown as any[], + x => x, + x => x + ), + [] + ) + }) test('returns mapped and filtered values', () => { const list = [ { group: 'a', word: 'hello' }, @@ -274,6 +292,15 @@ describe('array module', () => { ) assert.deepEqual(result, []) }) + test('works with index', () => { + const letters = ['a', 'b', 'c', 'd'] + const result = _.select( + letters, + (l, idx) => `${l}${idx}`, + (l, idx) => idx > 1 + ) + assert.deepEqual(result, ['c2', 'd3']) + }) }) describe('max function', () => {