[英]How to properly check if index exists, then use index to get value, then delete index & value from array javascript/jquery
I know the title was a mouthful, but describes what I need to do here. 我知道标题是满口的,但描述了我在这里需要做的事情。 I will admit I'm having a lot of trouble figuring this out!
我会承认我在解决这个问题上遇到了很多麻烦!
I'm trying to create a discount calculator and this is my first time using arrays. 我正在尝试创建折扣计算器,这是我第一次使用数组。
Here's the code I have so far... 这是我到目前为止的代码......
dTrackerArray = [];
//Create Array
dTrackerArray.push( [var1, var2] );
//Add Variables to Array
var check = $.inArray(var1, dTrackerArray);
// Checking to see if variable exists, keeps returning -1!!!
alert(JSON.stringify(dTrackerArray));
// Even though I have this right under it which alerts the array clearly showing var 1 and var 2 exist!
Once I've figured out how to properly check the array, I'd like to retain the value of the pair (in a variable perhaps), and then remove the pair from the array. 一旦我弄清楚如何正确检查数组,我想保留该对的值(可能在一个变量中),然后从数组中删除该对。
I'm sorry If this was a little hard to read or understand! 对不起如果这有点难以阅读或理解!
You're creating a multidimensional array ( [var1, var2]
becomes an object within the dTrackerArray
array.) 您正在创建一个多维数组(
[var1, var2]
成为dTrackerArray
数组中的一个对象。)
Try pushing var1
and var2
separately. 尝试分别推送
var1
和var2
。
dTrackerArray.push(var1);
dTrackerArray.push(var2);
You are adding an array that contains var1
and var2
to the dTrackerArray
array. 您正在向
dTrackerArray
数组添加包含var1
和var2
的数组。
Use this syntax instead: 请改用此语法:
dTrackerArray.push(var1);
dTrackerArray.push(var2);
// Or this syntax
dTrackerArray.push(var1, var2);
// Or this syntax
dTrackerArray = [ var1, var2 ];
Here's a working fiddle to demonstrate. 这是一个工作小提琴演示。
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