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How does js convert a string array into a single string?
First, array to string

You need to connect the array elements into a string with a certain character. The sample code is as follows:

var? First,? b,c; ?

Answer? =? New? Array (a, b, c, d, e); ?

b? =? a . join(“-); ? //a-b-c-d-e? Use-to splice array elements. =? a . join(“”); ? //abcde

Second, string to array.

The implementation method is to cut a string into several strings according to a certain character and return them in the form of an array. The sample code is as follows:

var? str? =? ‘a b+ c+de’; var? Answer? =? str . split('+'); ? //? 【ab,? c,? Germany]

var? b? =? str . split(“”); ? //[a,? b,? +,? c,? +,? d,? e]