字符串鏈接join( )

join( )括號中不加任何參數，默認是逗號鏈接css var arr = ['aa','bb','cc','dd']; alert(arr.join());//aa,bb,cc,dd join( )括號中加單引號，鏈接：web alert(arr.join(''));//aabbccdd jion( ) 括號中添加分隔符：svg alert(arr.join('-'));//aa-bb-cc-d

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