计算给定输入的出现 [英] Counting occurrences of a given input

问题描述

如果我有一个带有简单提交按钮的输入框，是否可以跟踪给出特定输入时单击按钮的次数.例如，我输入牛奶并点击提交，牛奶计数将为1，再次单击牛奶计数将为2.我知道使用一个简单的计数器变量，我可以跟踪计数，但是计数本身不匹配任何特定的输入，它只是按钮单击的通用计数器.我可以将输入中的值存储在数组中，然后对特定项目的出现进行计数以找到其计数，但是有没有更优雅的方法呢?

If I had an input box with a simple submit button, is there a way to keep track of the amount of times the button was clicked when certain input was given. For instance, I enter milk and hit submit, milk count would be 1, click again milk count would be two. I know that using a simple counter variable, I can keep track of the count, but the count would not match any particular input per se, it's just a generic counter of button clicks. I could store the values from the input in an array and then count the occurrences of a particular item to find its count, but is there a more elegant way to do this?

推荐答案

var listCount   = [];
$("#getButton").click(function() {
    var getTextValue    = $("#getInput").val();
    if(getTextValue!="") {
        var initVal     = typeof(listCount[getTextValue])=="undefined" ? 0 : listCount[getTextValue];
        listCount[getTextValue] = parseInt(initVal)+1;
        alert(listCount[getTextValue]);
    }
    return false;
});

初始化一个数组var listCount = [];，该数组将输入值存储为关联键，并且parseInt(initVal)+1将值增加n次单击.

Initialized an Array var listCount = [];, which stores the Input Value as Associative Key, and parseInt(initVal)+1 increments the value of n times click.

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