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jQuery: checking if the value of a field is null (empty)
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The value of a field can not be null, it's always a string value.
The code will check if the string value is the string "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...
What's wrong with using == to compare floats in Java?
According to this java.sun page == is the equality comparison operator for floating point numbers in Java.
21 Answers
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How to terminate a python subprocess launched with shell=True
I'm launching a subprocess with the following command:
12 Answers
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What does SQL clause “GROUP BY 1” mean?
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FROM account
GROUP BY 1;
In above query GROUP BY 1 refers to the first column in select statement which is
account_id.
You also can specify in ORDER BY.
Note : The number in ORDER BY and GROUP BY always start with 1 not with 0.
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jquery get all form elements: input, textarea & select
Is there an easy way (without listing them all separately) in jquery to select all form elements and only form elements.
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How do I hide an element on a click event anywhere outside of the element?
I would like to know whether this is the correct way of hiding visible elements when clicked anywhere on the page.
20 Answ...
How do I stop Entity Framework from trying to save/insert child objects?
...med it would only try to save the specified entity. However, it is also trying to save that entity's child entities. This is causing all sorts of integrity problems. How do I force EF to only save the entity I want to save and therefore ignore all child objects?
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How to pass prepareForSegue: an object
I have many annotations in a mapview (with rightCalloutAccessory buttons). The button will perform a segue from this mapview to a tableview . I want to pass the tableview a different object (that holds data) depending on which callout button was clicked.
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How do I test if a string is empty in Objective-C?
How do I test if an NSString is empty in Objective-C?
30 Answers
30
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How to vertically align a html radio button to it's label?
I have a form with radio buttons that are on the same line as their labels. The radio buttons are however not aligned vertically with their labels as shown in the screenshot below.
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