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Why is Python running my module when I import it, and how do I stop it?
...t to run your modules when it imports them.
To prevent code in the module from being executed when imported, but only when run directly, you can guard it with this if:
if __name__ == "__main__":
# this won't be run when imported
You may want to put this code in a main() method, so that you c...
Map.clear() vs new Map : Which one will be better? [duplicate]
... with new array. So, garbage collector should clear all the key and values from the previous map, and clear the reference to itself. So O(n) algorithm is executed anyway, but in the garbage collector thread. For 1000 records you won't see any difference.
BUT. The performance guide tells you that it...
How do I clear stuck/stale Resque workers?
As you can see from the attached image, I've got a couple of workers that seem to be stuck. Those processes shouldn't take longer than a couple of seconds.
...
Reading in a JSON File Using Swift
...Decoder()
let jsonData = try decoder.decode(ResponseData.self, from: data)
return jsonData.person
} catch {
print("error:\(error)")
}
}
return nil
}
Swift 3
func loadJson(filename fileName: String) -> [String: AnyObject]? {
if let...
Display clearColor UIViewController over UIViewController
... a view controller modally, iOS removes the view controllers underneath it from the view hierarchy for the duration it is presented. While the view of your modally presented view controller is transparent, there is nothing underneath it except the app window, which is black. iOS 7 introduced a new...
What's the difference between a continuation and a callback?
...callcc logically converts the entire function body back to what we started from (and gives those anonymous functions the name cc). The pythagoras function using this implementation of callcc becomes then:
function pythagoras(x, y, cont) {
callcc(function(cc) {
square(x, function (x_squa...
Pipe output and capture exit status in Bash
...ails, but if both 'command' and 'tee' fail, he would receive the exit code from 'tee'.
– t0r0X
Mar 7 '18 at 9:24
@Linu...
Command-line Tool to find Java Heap Size and Memory Used (Linux)?
...
Worth noting quote from jstat Oracle Java 8 manual page: This command is experimental and unsupported.
– patryk.beza
May 19 '15 at 20:20
...
How can I get the current user's username in Bash?
...oks at the user attached to stdin. However, if you are running a batch job from cron, or you are running a startup script as a different user than root, then these will either output the wrong user (root) or nothing at all. This answer will return the correct value regardless by looking at process's...
_=> what does this underscore mean in Lambda expressions?
...n in Haskell and other functional languages. I think that's where it comes from.
– Gabe Moothart
May 6 '10 at 4:34
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