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Is it possible to determine whether ViewController is presented as Modal?
....presentingViewController isKindOfClass:[UITabBarController class]];
}
Swift:
var isModal: Bool {
return self.presentingViewController?.presentedViewController == self
|| (self.navigationController != nil && self.navigationController?.presentingViewController?.presentedViewCon...
javascript set a variable if undefined
I know that I can test for a javascript variable and then define it if it is undefined, but is there not some way of saying
...
Testing if jQueryUI has loaded
...te, and I think that jQueryUI may not have loaded properly. How can I test if jQueryUI has loaded?
5 Answers
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Efficient way to remove keys with empty strings from a dict
...
Python 2.X
dict((k, v) for k, v in metadata.iteritems() if v)
Python 2.7 - 3.X
{k: v for k, v in metadata.items() if v is not None}
Note that all of your keys have values. It's just that some of those values are the empty string. There's no such thing as a key in a dict w...
How can one check to see if a remote file exists using PHP?
The best I could find, an if fclose fopen type thing, makes the page load really slowly.
22 Answers
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How do I check if a C++ std::string starts with a certain string, and convert a substring to an int?
...verload of rfind which has the pos parameter:
std::string s = "tititoto";
if (s.rfind("titi", 0) == 0) {
// s starts with prefix
}
Who needs anything else? Pure STL!
Many have misread this to mean "search backwards through the whole string looking for the prefix". That would give the wrong res...
jQuery ajax error function
... },
error: function (jqXHR, exception) {
var msg = '';
if (jqXHR.status === 0) {
msg = 'Not connect.\n Verify Network.';
} else if (jqXHR.status == 404) {
msg = 'Requested page not found. [404]';
} else if (jqXHR.status == 500) {
...
Detect IE version (prior to v9) in JavaScript
I want to bounce users of our web site to an error page if they're using a version of Internet Explorer prior to v9. It's just not worth our time and money to support IE pre-v9 . Users of all other non-IE browsers are fine and shouldn't be bounced. Here's the proposed code:
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Rebasing a branch including all its children
..." command output a star before the current branch, screwing up this script if one of the branches to rebase is currently checked out?
– Mark Lodato
Dec 20 '12 at 21:38
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One-line list comprehension: if-else variants
...
x if y else z is the syntax for the expression you're returning for each element. Thus you need:
[ x if x%2 else x*100 for x in range(1, 10) ]
The confusion arises from the fact you're using a filter in the first example, bu...