Created
November 14, 2017 00:55
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| /** | |
| * Flatten nested arrays. | |
| * | |
| * @param {array} arr - The nested array to be flattened | |
| * @param {number} failsafe - (Optional) In case of extreme depth, simply stops the recursion | |
| */ | |
| function FlattenArray(arr, failsafe){ | |
| if(typeof failsafe === 'undefined'){ | |
| failsafe = Number.MAX_SAFE_INTEGER; | |
| //failsafe = 1 | |
| } | |
| //console.log(failsafe); | |
| if(failsafe === 0) return []; | |
| failsafe--; | |
| return arr.reduce((a,elem)=>{ | |
| if(Array.isArray(elem)){ | |
| elem = FlattenArray(elem, failsafe); | |
| } | |
| else{ | |
| elem = [elem]; | |
| } | |
| while(elem.length > 0){ | |
| a.push(elem.shift()); | |
| } | |
| return a; | |
| },[]); | |
| } | |
| //Test code | |
| arr = [[1,2,[3]],4]; | |
| arr = FlattenArray(arr); | |
| arr = JSON.stringify(arr) | |
| console.log(arr); |
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