Jquery, checking if a value exists in array or not

This question already has an answer here:

How do I check if an array includes an object in JavaScript? 40 answers

---

If you want to do it using .map() or just want to know how it works you can do it like this:

var added=false;
$.map(arr, function(elementOfArray, indexInArray) {
 if (elementOfArray.id == productID) {
   elementOfArray.price = productPrice;
   added = true;
 }
}
if (!added) {
  arr.push({id: productID, price: productPrice})
}

The function handles each element separately. The .inArray() proposed in other answers is probably the more efficient way to do it.

---

http://api.jquery.com/jQuery.inArray/

if ($.inArray('example', myArray) != -1)
{
  // found it
}

---

jQuery has the inArray function:

http://api.jquery.com/jQuery.inArray/

链接地址: http://www.djcxy.com/p/13034.html

上一篇: 测试Javascript数组中的值

下一篇: jquery，检查数组中是否存在一个值