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Methods for generating empty and stubbed js arrays

Date Created: 2024/02/10

Last Update: 2024/02/10

#javascript #general #cheatsheet #notes


new Array(3).fill(0)


const LEN = 3 
const arr = []
for (let i=0; i<LEN; i++){
  arr.push(0)
}
// [0,0,0]

Personally I think the mapping methods are the cleanest and most versatile


const arr = Array.from({length: 3}, () => 0)
// [0, 0, 0]


const arr = Array.from({length: 3}, (x,i) => i)
// [0, 1, 2]