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Which is faster in Python: x**.5 or math.sqrt(x)?
..., yet
Here's some timings (Python 2.5.2, Windows):
$ python -mtimeit -s"from math import sqrt; x = 123" "x**.5"
1000000 loops, best of 3: 0.445 usec per loop
$ python -mtimeit -s"from math import sqrt; x = 123" "sqrt(x)"
1000000 loops, best of 3: 0.574 usec per loop
$ python -mtimeit -s"import ...
NGINX: upstream timed out (110: Connection timed out) while reading response header from upstream
...equest that map-reduces a chunk of data for about 25K users and returns it from Riak to the app, I get an error in the Nginx log:
...
Can't seem to discard changes in Git
After seeing the following from the command line:
19 Answers
19
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process.waitFor() never returns
... common reason is that the process produces some output and you don't read from the appropriate streams. This means that the process is blocked as soon as the buffer is full and waits for your process to continue reading. Your process in turn waits for the other process to finish (which it won't bec...
startActivityForResult() from a Fragment and finishing child Activity, doesn't call onActivityResult
...called");
}
Call startActivityForResult(intent, HOMEWORK_POST_ACTIVITY); from FragmentA.Java
Call finish(); method in SecondActivity.java
Hope this will work.
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Accessing class variables from a list comprehension in the class definition
How do you access other class variables from a list comprehension within the class definition? The following works in Python 2 but fails in Python 3:
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How to pass the values from one activity to previous activity
How do I pass a value from one screen to its previous screen?
6 Answers
6
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How do I stop a web page from scrolling to the top when a link is clicked that triggers JavaScript?
...he default action for the click event (i.e. navigating to the link target) from occurring.
There are two ways to do this.
Option 1: event.preventDefault()
Call the .preventDefault() method of the event object passed to your handler. If you're using jQuery to bind your handlers, that event will be...
Resolve conflicts using remote changes when pulling from Git remote
I'm trying to pull code from my GitHub repo onto my server, but the pull keeps failing because of merge conflicts. I don't want to keep any of the changes that may have occurred on my local server since the last pull.
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Creating a UIImage from a UIColor to use as a background image for UIButton [duplicate]
...rState:(UIControlState)state {
[self setBackgroundImage:[UIButton imageFromColor:backgroundColor] forState:state];
}
+ (UIImage *)imageFromColor:(UIColor *)color {
CGRect rect = CGRectMake(0, 0, 1, 1);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurre...