[英]How do I apply changes to a data object within a JavaScript array?
如果我有以下内容:
var dataContainer = [
{ id : 1, value : 5, qty : 73, orders: 7 },
{ id : 2, value : 6.15, qty : 212, orders: 49},
{ id : 3, value : 12.11, qty : 29, orders : 6}
];
如何使用JavaScript更新对象的值? 我一直在尝试以下方面:
function UpdateValues(passedId) {
var thisData = {};
for ( var i = 0; i < dataContainer.length; i++ ) {
thisData = dataContainer[i];
if (thisData.id == passedId) {
// I am updating the values in thisData
}
}
// Not sure what to do here in order to get thisData values back into dataContainer
}
于是,我就弹出dataContainer[i]
,并推thisData
回但这并没有工作。 除非我做错了吗? 我该怎么办? 我感谢任何帮助。
function UpdateValues(passedId, prop, newValue) {
var thisData = {};
for ( var i = 0; i < dataContainer.length; i++ ) {
thisData = dataContainer[i];
if (thisData.id == passedId) {
thisData[prop] = newValue;
}
}
}
//Change qty to 99999 for object with index of 1
UpdateValues(1, "qty", 99999);
我添加了一个小提琴,打印出结果: http : //jsfiddle.net/4UH9e/
function UpdateValues(passedId) {
var thisData = {};
for ( var i = 0; i < dataContainer.length; i++ ) {
var data = dataContainer[i];
for (i in data) {
thisData[i] = data[i];
}
if (thisData.id == passedId) {
//Update the values in thisData.
}
}
//You still have the original data in dataContainer
}
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