半夜爬起来问一个问题 - V2EX
zoowii

半夜爬起来问一个问题

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  •   zoowii Feb 8, 2014 3997 views
    This topic created in 4500 days ago, the information mentioned may be changed or developed.
    在对Javascript做语法解析和推导时,发现了一个问题,在对Jquery进行解析时,有碰到很多地方使用了诸如return a, b, c; if(a, b, c) {} if(a) {a, b, c}
    这样的语法。之前一直忘了,想问问大家这是Javascript的什么语法?
    2 replies    1970-01-01 08:00:00 +08:00
    Mutoo
        1
    Mutoo  
       Feb 8, 2014
    逗号表达式么

    逗号表达式的一般形式是:表达式1,表达式2,表达式3……表达式n
    逗号表达式的求解过程是:先计算表达式1的值,再计算表达式2的值,……一直计算到表达式n的值。最后整个逗号表达式的值是表达式n的值。
    zoowii
        2
    zoowii  
    OP
       Feb 8, 2014
    @Mutoo 谢谢。想起来了好像是有这个语法。感觉好冷门啊。拆开来写多好
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