Question

我有一个名为checkdata的数组：

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现在我想要的是在上面的示例数组中获取id的最大值为11并将其存储在变量中。我已经在php中使用相同的东西工作 max（array_column（$ checkdata ['details]]，'id'））; 。任何人都可以帮助使其在angular js中工作

Answer 1

您可以实现将最高ID放在首位

的排序方法

var arr = [{"name":"aasha","id":"1","age":"25","address":"happay appartment"},{"name":"megha","id":"2","age":"21","address":"viajy nagar"}, {"name":"sujeet","id":"11","age":"38","address":"pb road"}];

var highestId = arr.sort(function(a, b){
    return parseInt(b.id) - parseInt(a.id);
})

console.log(highestId[0])

您还可以使用map方法，该方法与上述排序类似，但只会返回不排序的整数数组

var items =  arr.map(function(o) { return parseInt(o.id); })

但是您可以在数组上执行Math.max方法以检索最大值：

var max = Math.max.apply(Math, items);

var arr = [{"name":"aasha","id":"1","age":"25","address":"happay appartment"},{"name":"megha","id":"2","age":"21","address":"viajy nagar"}, {"name":"sujeet","id":"11","age":"38","address":"pb road"}];

var highestId = arr.sort(function(a, b){
	return parseInt(b.id) - parseInt(a.id);
})

console.log(highestId[0].id)

var items =  arr.map(function(o) { return parseInt(o.id); })
var max = Math.max.apply(Math, items);

console.log(max)

Answer 2

假设name属性后的缺失引号是一个错字。您可以尝试关注

您可以使用简单的Javascript获得最大值。使用Number将id的字符串值转换为数字，并使用Array.reduce转换为最大值。

var arr = [{"name":"aasha","id":"1","age":"25","address":"happay appartment"},
 {"name":"megha","id":"2","age":"21","address":"viajy nagar"},
 {"name":"sujeet","id":"11","age":"38","address":"pb road"}];
 
var id = arr.reduce((a,{id}) => Number(id) > a ? Number(id) : a , -1);
console.log(id);

如何在Angular JS中获取数组中特定列的最大值

2 个答案: