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Checking if a variable is defined?
...correct syntax for the above statement is:
if (defined?(var)).nil? # will now return true or false
print "var is not defined\n".color(:red)
else
print "var is defined\n".color(:green)
end
substituting (var) with your variable. This syntax will return a true/false value for evaluation in the if ...
Big O, how do you calculate/approximate it?
Most people with a degree in CS will certainly know what Big O stands for .
It helps us to measure how well an algorithm scales.
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Piping command output to tee but also save exit code of command [duplicate]
...han a single pipe then you'll need to check the status of each command to know where it failed.
– Joshua Olson
Aug 23 '13 at 2:11
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UILongPressGestureRecognizer gets called twice when pressing down
...ends (UIGestureRecognizerStateEnded) when any of the fingers are lifted.
Now You Can Track The State Like This
- (void)handleLongPress:(UILongPressGestureRecognizer*)sender {
if (sender.state == UIGestureRecognizerStateEnded) {
NSLog(@"UIGestureRecognizerStateEnded");
//Do Whateve...
sh: 0: getcwd() failed: No such file or directory on cited drive
... can happen with symlinks sometimes. If you experience this issue and you know you are in an existing directory, but your symlink may have changed, you can use this command:
cd $(pwd)
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impr...
index.php not loading by default
...DirectoryIndex index.html
DirectoryIndex index.php
</IfModule>
now this will look for index.html file if not found it will look for index.php.
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Go to Matching Brace in Visual Studio?
...TRL + ]. It works with parentheses ( ), brackets [ ] and braces { }. From now on you don’t need to play Where’s Waldo? to find that brace.
On MacOS, use CMD + SHIFT + \
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RestSharp simple complete example [closed]
...
As it is now, this is a link-only answer.
– Alex
Nov 26 '15 at 9:20
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SVN remains in conflict?
...ich will take the current state of your local copy as "resolved solution". Now hit "OK" and that's it.
The conflicting symbol should have disappeared and you should be able to commit again.
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SQL Server 2012 column identity increment jumping from 6 to 1000+ on 7th entry [duplicate]
...art your sql server? I have been running several instances for over a year now, not a single issue with sequences.
– Mithrandir
May 8 '14 at 19:24
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