问题描述
我正在寻找一种从数组中删除重复值的简单方法。我想出了如何检测是否有重复,只是我不知道如何推它的价值。例如,如果您转到提供的链接,然后键入abca (每个字母后按回车/回车键) ,将会提示重复!但是我也想弄清楚如何从textarea中删除那个重复的内容?
这似乎是不要工作::
sort = sort.push(i);
textVal = sort;
返回textVal;
为什么这么难呢,可以做到更容易使用JavaScript过滤功能,这是特别针对这种类型的操作:
$ $ p $ var c arr = [苹果,bannana ,橙,苹果,橙];
$ b $ arr = arr.filter(function(item,index,inputArray){
return inputArray.indexOf(item)== index;
});
---------------------
输出:[apple,bannana,orange ]
I'm looking for an easy way of removing a duplicate value from an array. I figured out how to detect if there is a duplicate or not, just I don't know how to "push" it from the value. For example, if you go to the link provided, and then type, "abca" (press return/enter key after each letter).. it will alert "duplicate!"
But I also want to figure out how to remove that duplicate from the textarea?
This is the part that seems to not be working ::
sort = sort.push(i);
textVal = sort;
return textVal;
Why do it the hard way, it can be done more easily using javascript filter function which is specifically for this kind of operations:
var arr = ["apple", "bannana", "orange", "apple", "orange"];
arr = arr.filter( function( item, index, inputArray ) {
return inputArray.indexOf(item) == index;
});
---------------------
Output: ["apple", "bannana", "orange"]
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