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Check if string contains only digits
I want to check if a string contains only digits. I used this:
14 Answers
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Why static classes cant implement interfaces? [duplicate]
...ository would be used throughout the runtime of my application it seemed like a sensible thing to me to make it a static class so I could go
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How to loop through an associative array and get the key? [duplicate]
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You can do:
foreach ($arr as $key => $value) {
echo $key;
}
As described in PHP docs.
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iPhone: Setting Navigation Bar Title
...ust be a child of some UINavigationController for the .title property to take effect. If the UINavigationBar is simply a view, you need to push a navigation item containing the title, or modify the last navigation item:
UINavigationItem* item = [[UINavigationItem alloc] initWithTitle:@"title text"]...
How do I put a variable inside a string?
I would like to put an int into a string . This is what I am doing at the moment:
8 Answers
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How to get document height and width without using jquery
...ment height and width in pure javascript i.e without using jquery .
I know about $(document).height() and $(document).width() , but I want to do this in javascript .
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HTTP authentication logout via PHP
...mation.
In other words, you may be able to show the login box again (as @Karsten says), but the browser doesn't have to honor your request - so don't depend on this (mis)feature too much.
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How can I convert an RGB image into grayscale in Python?
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When to use ' (or quote) in Lisp?
After making it through the major parts of an introductory Lisp book, I still couldn't understand what the special operator (quote) (or equivalent ' ) function does, yet this has been all over Lisp code that I've seen.
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How to correctly use the extern keyword in C
...y question is about when a function should be referenced with the extern keyword in C.
10 Answers
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