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jQuery: checking if the value of a field is null (empty)
... "NULL". You want to check if it's an empty string instead:
if ($('#person_data[document_type]').val() != ''){}
or:
if ($('#person_data[document_type]').val().length != 0){}
If you want to check if the element exist at all, you should do that before calling val:
var $d = $('#person_data[docum...
What is the difference between `after_create` and `after_save` and when to use which?
Are after_create and after_save the same as per functionality?
3 Answers
3
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Reshaping data.frame from wide to long format
...UE)
library(reshape)
x2 <- melt(x, id = c("Code", "Country"), variable_name = "Year")
x2[,"Year"] <- as.numeric(gsub("X", "" , x2[,"Year"]))
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Is there a download function in jsFiddle?
... put /show a after the URL you're working on:
http://jsfiddle.net/<your_fiddle_id>/show/
It is the site that shows the results.
And then when you save it as a file. It is all in one HTML-file.
For example:
http://jsfiddle.net/Ua8Cv/show/
for the site http://jsfiddle.net/Ua8Cv
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How do I select an element in jQuery by using a variable for the ID?
...
row = $("body").find('#' + row_id);
More importantly doing the additional body.find has no impact on performance. The proper way to do this is simply:
row = $('#' + row_id);
s...
Easiest way to check for an index or a key in an array?
...
I solved in this way: if test "${myArray['key_or_index']+isset}"; then echo "yes"; else echo "no"; fi; It seems to me the simplest way and it applies to indexed and associative arrays. Thank you
– Luca Borrione
Nov 4 '12 at 19:13
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JQuery to load Javascript file dynamically
...alls to 'Add Comment') so the code might look something like this:
$('#add_comment').click(function() {
if(typeof TinyMCE == "undefined") {
$.getScript('tinymce.js', function() {
TinyMCE.init();
});
}
});
Assuming you only have to call init on it once, that is....
Gesture recognizer and button actions
...ewController: UIGestureRecognizerDelegate {
public func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
if touch.view is UIButton {
return false
}
return true
}
Don't forget to:
Make your tapper object delegate to self (e...
Do checkbox inputs only post data if they're checked?
...lt. However, if you are not interested in the value, just use:
if (isset($_POST['the_checkbox'])){
// name="the_checkbox" is checked
}
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fol...
What in the world are Spring beans?
...dia I should say "instance objects" instead: en.wikipedia.org/wiki/Instance_(computer_science)
– Elias Dorneles
Oct 5 '18 at 16:03
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