javascript jQuery从逗号分隔列表中删除值
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jQuery removing values from a comma separate list
提问by TheExit
Given an input like:
给定一个输入，如：
<input type="test" value="3,4,9" />
What's the best way to remove a value like 9, 4 or 3, without having issues with the commas, I don't want this ending up:
在没有逗号问题的情况下，删除 9、4 或 3 之类的值的最佳方法是什么，我不希望这样结束：
value="3,4,"
value="3,,9"
value=",4,9"
Is there a clean way to get this done in JavaScript/jQuery?
有没有一种干净的方法可以在 JavaScript/jQuery 中完成这项工作？
回答by The Who
You could split your value into an array, then filter out values you do not want.
您可以将您的值拆分为一个数组，然后过滤掉您不想要的值。
$("input[type='test']").val().split(",") // ["3","4","9"]
.filter(function(v){return !isNaN(parseInt(v))}) // filter out anything which is not 0 or more
Here is a less terse version which filters out anything which is not numeric
这是一个不那么简洁的版本，它过滤掉了任何不是数字的东西
var array = $("input[type='test']").val().split(",");
// If you are dealing with numeric values then you will want
// to cast the string as a number
var numbers = array.map(function(v){ return parseInt(v)});
// Remove anything which is not a number
var filtered = numbers.filter(function(v){ return !isNaN(v)});
// If you want to rejoin your values
var joined = filtered.join(",");
Finally change the value on the input
最后更改输入上的值
$("input[type='test']").val(joined);
回答by Marek Sebera
Similar to PHP implode/explode functions
类似于 PHP 内爆/爆炸功能
Array.prototype.remove = function(from, to) {
var rest = this.slice((to || from) + 1 || this.length);
this.length = from < 0 ? this.length + from : from;
return this.push.apply(this, rest);
};
var explode = value.split(',');
explode.remove(1);
var implode = explode.join(',');
Documentation:
fce: Split
fce: Join
fce: Array.remove
回答by Kirk Strobeck
No jQuery required :P
不需要 jQuery :P
<script type="text/javascript">
//var subject = '3,4,9';
//var subject = '3,,9';
var subject = ',,4,9';
var clean = Array();
var i = 0;
subject = subject.split(',');
for (var a in subject)
{
if(subject[a].length)
{
clean[i] = subject[a];
i++;
}
}
document.write(clean.join(','));
</script>
回答by Yuri Ghensev
You may also use pure javascript. Let say you want to take off only "4":
您也可以使用纯 javascript。假设您只想起飞“4”：
value = value.replace(/4,?/, '')
or "3" and "9":
或“3”和“9”：
value = value.replace(/([39],?)+/, '')
回答by Mohammad Reza Arani Kashani
You can use this function:
您可以使用此功能：
function removeComma(x) {
var str = '';
var subs = '';
for(i=1; i<=x.length; i++) {
subs = x.substring(i-1, i).trim();
if(subs !== ',') {
str = str+subs;
}
}
return str;
}
回答by Keith
var ary = value.split(',');
ary.splice(indexOfItemToRemove,1)
var result = ary.join(',');
回答by Joe Hanink
This is discussed in another post:
这在另一篇文章中讨论过：
remove value from comma separated values string
var removeValue = function(list, value, separator) {
separator = separator || ",";
var values = list.split(",");
for(var i = 0 ; i < values.length ; i++) {
if(values[i] == value) {
values.splice(i, 1);
return values.join(",");
}
}
return list;
}
回答by dqhendricks
use
利用
array = string.split(separator);
to break a string into an array. then use this to join after manipulations.
将字符串分解为数组。然后在操作后使用它来加入。
string = array.join(separator);
回答by thekoehl
I think this function will work for what you are trying to do: http://www.w3schools.com/jsref/jsref_split.asp
我认为此功能适用于您要执行的操作：http: //www.w3schools.com/jsref/jsref_split.asp
string.split(separator, limit)
