splice - masuyama's notes

splice

Array.prototype.splice() - JavaScript | MDN

memo

code:js

const array = "a", "b", "c"

const aa = []

aa.splice(0, ...array)

aa

const bb = []

bb.splice(0, 'a', 'b', 'c')

bb

const cc = []

cc.splice(0, 0, ...array)

cc

//=> 'a', 'b', 'c'

# push が簡単

const xx = []

xx.push(...array)

//=> 'a', 'b', 'c'

code:js

// 第3引数があるときは第2引数を省略できない

splice(start)

splice(start, deleteCount)

splice(start, deleteCount, item1)

splice(start, deleteCount, item1, item2, itemN)