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cancelling a handler.postdelayed process
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If you can afford to cancel all callbacks and messages on the handler and don't want to have to keep references to the runnable the third point in the accepted answer to this question is another alternative that seems to work...
Trigger a button click with JavaScript on the Enter key in a text box
... was pretty much synonymous with JS back when this answer was posted. But now a lot of us who avoid jQuery altogether (because it's just a waste of kb when you're using something like React) feel annoyed when we search for answers to JS questions and often the first thing that comes up is a library...
RegEx for Javascript to allow only alphanumeric
... a reg ex that only allows alphanumeric. So far, everyone I try only works if the string is alphanumeric, meaning contains both a letter and a number. I just want one what would allow either and not require both.
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Collect successive pairs from a stream
...r;
return pair;
}
}).skip(1); // drop first null
Now you can limit your stream to the length you want
pairStream.limit(1_000_000).forEach(i -> System.out.println(i));
P.S. I hope there is better solution, something like clojure (partition 2 1 stream)
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Showing the stack trace from a running Python application
... a process will be running for a long time but gets stuck sometimes for unknown and irreproducible reasons. Its a bit hacky, and only works on unix (requires signals):
import code, traceback, signal
def debug(sig, frame):
"""Interrupt running process, and provide a python prompt for
inter...
Why is parenthesis in print voluntary in Python 2.7?
... a Tuple. This special treatment of the print statement enables it to act differently if there is a trailing , or not.
Happy coding.
*This print behavior in Python 2 can be changed to that of Python 3:
from __future__ import print_function
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Javascript - Open a given URL in a new tab by clicking a button
...owser or tab. You can also add variables to it to stop it from showing specific browser traits as follows:
onclick="window.open(this.href,'popUpWindow','height=400,width=600,left=10,top=10,,scrollbars=yes,menubar=no'); return false;"
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Converting string from snake_case to CamelCase in Ruby
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If you're using Rails, String#camelize is what you're looking for.
"active_record".camelize # => "ActiveRecord"
"active_record".camelize(:lower) # => "activeRecord"
If you want to get an act...
JavaScript is in array
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Try this:
if(blockedTile.indexOf("118") != -1)
{
// element found
}
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How do I add 1 day to an NSDate?
...= [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
// now build a NSDate object for the next day
NSDateComponents *offsetComponents = [[NSDateComponents alloc] init];
[offsetComponents setDay:1];
NSDate *nextDate = [gregorian dateByAddingComponents:offsetComponents toDate: [N...