要对如图一所示的左侧table的数据按照“总量”进行排序
1，在前端实现
2，数据格式为object，如图二
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javascript中经常操作就是json/object/array，它们之间也经常需要转换。
json/object没有sort方法，array有；因此先将data转换为array
不只是排序，其他很多操作如获取长度，增加删除元素，取最大最小值都需要转换为Array
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var
proarray = [];for(x in
data[‘province‘]) { proarray.push([x, data[‘province‘][x]]);}proarray.sort(function(b,a){ //因为是对总量进行排序，所以要对正面、中性、负面的总和进行比较 return
a[1][‘zm‘]-b[1][‘zm‘]+a[1][‘zx‘]-b[1][‘zx‘]+a[1][‘fm‘]-b[1][‘fm‘];}); |
再打印以下 排序之后的 proarray变量（array）
原创文章，转载请注明：http://www.cnblogs.com/phpgcs
完整的源码如下：
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console.log(data[‘province‘]);console.log(typeof(data[‘province‘]));var
counter = 1;var
tbody = ‘‘;tbody +=‘ <table class="table table-striped table-bordered table-hover" id="weiboprovince_table"> <thead> <tr> <th style="width:8px;">#</th> <th>省份</t h> <th>总量</th> <th>正面</th> <th>负面</th> </tr> </thead> <tbody>‘;var
proarray = [];for(x in
data[‘province‘]) { proarray.push([x, data[‘province‘][x]]);}proarray.sort(function(b,a){ return
a[1][‘zm‘]-b[1][‘zm‘]+a[1][‘zx‘]-b[1][‘zx‘]+a[1][‘fm‘]-b[1][‘fm‘];});for(x in
proarray) { tbody += ‘<tr>‘; tbody += ‘<td>‘; tbody += ‘<div class="label label-success" style="color:white;">‘+(counter++)+‘</div>‘; tbody += ‘</td>‘; tbody += ‘<td>‘; tbody += proarray[x][0]; tbody += ‘</td>‘; tbody += ‘<td>‘; tbody += parseInt(proarray[x][1][‘zm‘]+ proarray[x][1][‘zx‘] + proarray[x][1][‘fm‘]); tbody += ‘</td>‘; tbody += ‘<td>‘; tbody += proarray[x][1][‘zm‘]; tbody += ‘</td>‘; tbody += ‘<td>‘; tbody += proarray[x][1][‘fm‘]; tbody += ‘</td>‘; tbody += ‘</tr>‘;}tbody += ‘</tbody>‘;tbody += ‘</table>‘;$(‘#map_list‘).html(tbody); |
延伸：
javascript中常用数据格式的转换
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function
json2array(json){ var
result = []; var
keys = Object.keys(json); keys.forEach(function(key){ result.push(json[key]); }); return
result;}//examplejson2array({a:1,b:2});[1, 2]//more complex examplejson2array({20131013: 66, 20131014: 198, 20131015: 253, 20131016: 352, 20131017: 293, 20131018: 277, 20131019: 111, 20131020: 91, 20131021: 255, 20131022: 256, 20131023: 293, 20131024: 390, 20131025: 401, 20131026: 117, 20131027: 45, 20131028: 54, 20131029: 59, 20131030: 66, 20131031: 109, 20131101: 32});[66, 198, 253, 352, 293, 277, 111, 91, 255, 256, 293, 390, 401, 117, 45, 54, 59, 66, 109, 32] |
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var
a = [{"obj1":"phpgcs"}, {"obj2":"ganiks"}]console.log(a);//[Object, Object]JSON.stringify(a)//"[{"obj1":"phpgcs"},{"obj2":"ganiks"}]" |
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"1,2".split(",").map(Number);[1, 2]"1,2".split(",");["1", "2"]JSON.parse("["+"1,2"+"]");[1, 2] |
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//php print_r($response);.post(url, params, function(data){ console.log(data);//data并不是规范的JSON格式的 data = $.parseJSON(data); console.log(data);});<br>//这里如果直接用.getJSON方法获取ajax数据则直接就是规范的JSON数据 |
参考：
http://phpgcs.com/2013/10/31/javascript-tricks-collection.html
http://stackoverflow.com/questions/17684921/sort-json-object-in-javascript
http://stackoverflow.com/questions/1069666/sorting-javascript-object-by-property-value
从一个实例看javascript几种常用格式的转换,布布扣,bubuko.com
原文：http://www.cnblogs.com/phpgcs/p/json_object_array_string.html