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#split()

特定の文字を引数に渡すとその文字で区切って配列にしてくれる。

var str = 'a k';
var spl = str.split(" "); #引数に入っているのは半角スペース
console.log(spl);

=> [a,k]

#join()

配列の区切りを渡した引数に置き換えて文字列に変換する。


var array = ['a','k'];
var ary = array.join("-");

console.log(ary);

=> 'a-k'
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