How can I find duplicate values in an array using jQuery?
I have some inputs whose names are arrays in one form:
<input type="text" name="email[]" id="email" />
<input type="text" name="email[]" id="email" />
<input type="text" name="email[]" id="email" />
and etc.
when i submit the form i need to validate jQuery, if you have duplicate value on these inputs can anyone help me?
thank:)
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1 answer
I would do it like this:
var values = $('input[name="email[]"]').map(function() {
return this.value;
}).toArray();
var hasDups = !values.every(function(v,i) {
return values.indexOf(v) == i;
});
$('form').submit(function(e) {
if (hasDups) e.preventDefault();
});
Also, IDs must be unique, as people say in the comments.
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