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zhangjw152
V2EX  ›  问与答

关于 PHP 数组大小的比较

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  •   zhangjw152 · Mar 18, 2017 · 2359 views
    This topic created in 3339 days ago, the information mentioned may be changed or developed.
    A < B and still B < A...

    $A = [1 => 1, 2 => 0, 3 => 1];
    $B = [1 => 1, 3 => 0, 2 => 1];

    var_dump($A < $B); // TRUE
    var_dump($B < $A); // TRUE

    var_dump($A > $B); // TRUE
    var_dump($B > $A); // TRUE

    Next - C and D are comparable, but neither C < D nor D < C (and still C != D)...

    $C = [1 => 1, 2 => 1, 3 => 0];
    $D = [1 => 1, 3 => 1, 2 => 0];

    var_dump($C < $D); // FALSE
    var_dump($D < $C); // FALSE

    var_dump($C > $D); // FALSE
    var_dump($D > $C); // FALSE

    var_dump($D == $C); // FALSE

    如上,这是为何?
    5 replies    2017-03-19 12:39:32 +08:00
    sun019
        1
    sun019  
       Mar 18, 2017
    php 数组还能比较大小第一次听说
    U7Q5tLAex2FI0o0g
        2
    U7Q5tLAex2FI0o0g  
       Mar 18, 2017
    数组比较大小?
    HanSonJ
        3
    HanSonJ  
       Mar 18, 2017
    思考专研可以使科技进步,而质疑动机不可以
    gouchaoer
        4
    gouchaoer  
       Mar 18, 2017 via Android
    这对开发没有用,纠结干嘛
    zhangjw152
        5
    zhangjw152  
    OP
       Mar 19, 2017
    @gouchaoer 也只是好奇
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