使用javascript查找最低值
这里是输入使用javascript查找最低值,javascript,json,multidimensional-array,Javascript,Json,Multidimensional Array,这里是输入 [{"Organisation unit":"Barisal Division","BCG Coverage (EPI) Jan to Jun 2014":130.3,"BCG Coverage (EPI) Jul to Dec 2014":112.7}, {"Organisation unit":"Chittagong Division","BCG Coverage (EPI) Jan to Jun 2014":118.4,"BCG Coverage (EPI) Jul to De
[{"Organisation unit":"Barisal Division","BCG Coverage (EPI) Jan to Jun 2014":130.3,"BCG Coverage (EPI) Jul to Dec 2014":112.7},
{"Organisation unit":"Chittagong Division","BCG Coverage (EPI) Jan to Jun 2014":118.4,"BCG Coverage (EPI) Jul to Dec 2014":122.4},
{"Organisation unit":"Dhaka Division","BCG Coverage (EPI) Jan to Jun 2014":112.9,"BCG Coverage (EPI) Jul to Dec 2014":123.3},
{"Organisation unit":"Khulna Division","BCG Coverage (EPI) Jan to Jun 2014":126.9,"BCG Coverage (EPI) Jul to Dec 2014":113.2},
{"Organisation unit":"Rajshahi Division","BCG Coverage (EPI) Jan to Jun 2014":168.5,"BCG Coverage (EPI) Jul to Dec 2014":175.7},
{"Organisation unit":"Rangpur Division","BCG Coverage (EPI) Jan to Jun 2014":128.5,"BCG Coverage (EPI) Jul to Dec 2014":129},
{"Organisation unit":"Sylhet Division","BCG Coverage (EPI) Jan to Jun 2014":200,"BCG Coverage (EPI) Jul to Dec 2014":104.6}]
下面是我如何将输入显示到表中的代码
var _table_ = document.createElement('table'),
_tr_ = document.createElement('tr'),
_th_ = document.createElement('th'),
_td_ = document.createElement('td');
// Builds the HTML Table out of myList json data from Ivy restful service.
function buildHtmlTable(arr) {
var table = _table_.cloneNode(false),
columns = addAllColumnHeaders(arr, table);
for (var i=0, maxi=arr.length; i < maxi; ++i) {
var tr = _tr_.cloneNode(false);
for (var j=0, maxj=columns.length; j < maxj ; ++j) {
var td = _td_.cloneNode(false);
cellValue = arr[i][columns[j]];
td.appendChild(document.createTextNode(arr[i][columns[j]] || ''));
tr.appendChild(td);
}
table.appendChild(tr);
}
return table;
}
// Adds a header row to the table and returns the set of columns.
// Need to do union of keys from all records as some records may not contain
// all records
function addAllColumnHeaders(arr, table)
{
var columnSet = [],
tr = _tr_.cloneNode(false);
for (var i=0, l=arr.length; i < l; i++) {
for (var key in arr[i]) {
if (arr[i].hasOwnProperty(key) && columnSet.indexOf(key)===-1) {
columnSet.push(key);
var th = _th_.cloneNode(false);
th.appendChild(document.createTextNode(key));
tr.appendChild(th);
}
}
}
table.appendChild(tr);
return columnSet;
}
var\u table\u=document.createElement('table'),
_tr=document.createElement('tr'),
_th=document.createElement('th'),
_td=document.createElement('td');
//从Ivy restful服务的myList json数据构建HTML表。
函数buildHtmlTable(arr){
变量表=\表\克隆节点(假),
columns=AddAllColumnHeader(arr,表格);
对于(变量i=0,最大值=arr.length;i
输出结果如下所示
现在,我将介绍如何找出每行第2列和第3列之间的最小值,并将背景色设置为最小值的红色
您可以通过首先计算第2列或第3列中的最低值来完成此操作:
var smallest = Infinity;
myList.forEach(function (i) {
smallest = Math.min(
smallest,
i['BCG Coverage (EPI) Jan to Jun 2014'],
i['BCG Coverage (EPI) Jul to Dec 2014']
);
});
然后在buildHtmlTable
函数的最内部循环中,对照最低值检查您正在构建的
值;如果它们匹配,则在
中添加红色背景色:
for(var j=0,maxj=columns.length;j
此处的mylist是什么?实际上,我想我没有放置代码的第一部分,也没有将错误的变量作为mylist@jox谢谢你把它放在小提琴上。我在原来的帖子中错过了。谢谢@jox,但你看到结果了吗?最后一行只变成红色,但我希望每一行都变成红色row@moinkhan嗯,我想你不是每排都要。我想您希望该行中的每一列都使用它。最简单的方法是将设置颜色的行中的“td”改为“tr”。看见
for (var j=0, maxj=columns.length; j < maxj ; ++j) {
var td = _td_.cloneNode(false);
cellValue = arr[i][columns[j]];
// Add red background if cellValue is the smallest value.
if (cellValue === smallest) td.style.backgroundColor = 'red';
td.appendChild(document.createTextNode(arr[i][columns[j]] || ''));
tr.appendChild(td);
}