Question

我需要在特定键的JSON对象中找到2个变量的最小值，并用该值减去所有键。请关注以下JSON数据

$print = '{"Table":[
{"Column":2,"Length":1,"Number":"A4","Row":12,"zindex":0}, 
{"Column":2,"Length":1,"Number":"A3","Row":11,"zindex":0},
{"Column":2,"Length":1,"Number":"A2","Row":9,"zindex":1},
{"Column":2,"Length":1,"Number":"A1","Row":8,"zindex":1},  
{"Column":3,"Length":1,"Number":"B4","Row":12,"zindex":0},
{"Column":3,"Length":1,"Number":"B3","Row":11,"zindex":0},
{"Column":3,"Length":1,"Number":"B2","Row":9,"zindex":0},
{"Column":3,"Length":1,"Number":"B1","Row":8,"zindex":0},
{"Column":4,"Length":1,"Number":"C4","Row":12,"zindex":0},
{"Column":4,"Length":1,"Number":"C3","Row":11,"zindex":0},  
{"Column":4,"Length":1,"Number":"C2","Row":9,"zindex":0},
{"Column":4,"Length":1,"Number":"C1","Row":8,"zindex":0}],"ResponseStatus":200,"Message":null}';

我想要上面给出的JSON数据。

$print = '{"Table":[
    {"Column":2,"Length":1,"Number":"A4","Row":1,"zindex":0}, 
    {"Column":2,"Length":1,"Number":"A3","Row":0,"zindex":0},
    {"Column":2,"Length":1,"Number":"A2","Row":1,"zindex":1},
    {"Column":2,"Length":1,"Number":"A1","Row":0,"zindex":1},  
    {"Column":3,"Length":1,"Number":"B4","Row":1,"zindex":0},
    {"Column":3,"Length":1,"Number":"B3","Row":0,"zindex":0},
    {"Column":3,"Length":1,"Number":"B2","Row":1,"zindex":1},
    {"Column":3,"Length":1,"Number":"B1","Row":0,"zindex":1},
    {"Column":4,"Length":1,"Number":"C4","Row":1,"zindex":0},
    {"Column":4,"Length":1,"Number":"C3","Row":0,"zindex":0},  
    {"Column":4,"Length":1,"Number":"C2","Row":1,"zindex":1},
    {"Column":4,"Length":1,"Number":"C1","Row":0,,"zindex":1}],"ResponseStatus":200,"Message":null}';

在上面的JSON数据中，请查看Row和zindex。 zindex有两个值＆＃34; 0和1＆＃34;，这里我希望php代码分别找到zindex 0的最小值，并单独减去zindex 0的剩余值，与zindex 1相同。

我有一个PHP代码，它找到了行的最小值，并用该值减去了剩余的行。但我不知道如何分别为不同的zindexs做这件事。

$rows = array();
$print = json_decode($print, true); // decode
foreach($print['Table'] as $val) { $rows[] = $val['Row']; }
$least = min($rows); // get least // $least = min(array_column($print['Table'], 'Row'));
foreach($print['Table'] as &$val) {
    $val['Row'] -= $least; // make subtractions
}
$print = json_encode($print); // re encode

请帮助我在PHP中解决这个问题。

Answer 1

尝试将第一个foreach替换为：

foreach($print['Table'] as $val) {
    if (!isset($rows[$val['zindex']])) {
        $rows[$val['zindex']] = array();
    }
    $rows[$val['zindex']][] = $val['Row'];
}

该数组不是具有值的一维数组，而是二维的，具有zindex的每个值的所有Row值。

然后，$least也应该是一个数组：

$least = array();
foreach ($rows as $zindex = $row) {
    $least[$zindex] = min($row);
}

这将分别计算每个zindex值的最小值。

最后，最后foreach也应该区分zindex：

foreach ($print['Table'] as &$val) {
    $val['Row'] -= $least[$val['zindex']];
}

成功！

如何在JSON中找到2个不同变量的最小值，并用该值减去其他元素

1 个答案: