json数据值类型

Question

我希望将json数组值从字符串更改为从php脚本中的浮动值。都是字符串类型。我想把它作为浮子类型。

[{"year":"2008","value":"4169.20"},
{"year":"2009","value":"4067.50"},
{"year":"2010","value":"4848.40"},
{"year":"2011","value":"5654.80"},
{"year":"2012","value":"6071.50"}]

但我想让它看起来像。有可能吗？

[{"year":"2008","value":4169.20},
{"year":"2009","value":4067.50},
{"year":"2010","value":4848.40},
{"year":"2011","value":5654.80},
{"year":"2012","value":6071.50}]

Answer 1

最简单的方法是在将数据编码到JSON之前先将value转换为浮动。

但是，如果您只想在JS中工作：

var data = [ /* your data */ ];

data.forEach(function(item){
  item.value = +item.value;
});

输出：

[
  {"year":"2008","value":4169.2},
  {"year":"2009","value":4067.5},
  {"year":"2010","value":4848.4},
  {"year":"2011","value":5654.8},
  {"year":"2012","value":6071.5}
]

Answer 2

<?php
$data = '[{"year":"2008","value":"4169.20"},
{"year":"2009","value":"4067.50"},
{"year":"2010","value":"4848.40"},
{"year":"2011","value":"5654.80"},
{"year":"2012","value":"6071.50"}]';

$a = json_decode($data);
$b = array();
foreach ($a as $key => $v) {
 $c['year'] = $v->year;
 $c['value'] = (float) $v->value;
 $b[] = $c;
}
echo '<pre>';
print_r(json_encode($b));
echo '</pre>';
?>

演示

Answer 3

使用javascript parseFloat()函数：

例如：

var b = parseFloat("10.00")