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Replacing spaces with underscores in JavaScript?
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edited Feb 13 '09 at 15:29
answered Jan 13 '09 at 22:10
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Make UINavigationBar transparent
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to achieve this in Swift from within a ViewController, do it like this: self.navigationController?.navigationBar.setBackgroundImage(UIImage(), forBarMetrics: UIBarMetrics.Default) self.navigationController?.navigationBar.shadowImage = ...
Determine the number of NA values in a column
...e summary output when used on a single column is useable, while its output from an entire data frame is character and the counts are difficult to extract if you need them later. See c(summary(mtcars)).
– Rich Scriven
Aug 20 '16 at 19:11
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Android DialogFragment vs Dialog
...sage - the problem is okMessage's target which will be null if you load it from a Bundle. If the target of a Message is null, and you use sendToTarget, you will get a NullPointerException - not because the Message is null, but because its target is.
– hrnt
Nov ...
(grep) Regex to match non-ASCII characters?
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This will match a single non-ASCII character:
[^\x00-\x7F]
This is a valid PCRE (Perl-Compatible Regular Expression).
You can also use the POSIX shorthands:
[[:ascii:]] - matches a single ASCII char
[^[:ascii:]] - matches a single non-ASCII char
[^[:print:]] will pr...
Why is exception.printStackTrace() considered bad practice?
...discards all data written to it, as is the case of /dev/null.
Inferring from the above, invoking Throwable.printStackTrace() constitutes valid (not good/great) exception handling behavior, only
if you do not have System.err being reassigned throughout the duration of the application's lifetime,...
GOTO still considered harmful? [closed]
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GOTO can make 'jump'ing from one arbitrary spot to another arbitrary spot. Velociraptor jumped to here from nowhere!
– rpattabi
Jul 10 '10 at 18:29
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How do you find the current user in a Windows environment?
...an get a complete list of environment variables by running the command set from the command prompt.
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Something like 'contains any' for Java set?
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Wouldn't Collections.disjoint(A, B) work? From the documentation:
Returns true if the two specified collections have no elements in common.
Thus, the method returns false if the collections contains any common elements.
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Git push error: Unable to unlink old (Permission denied)
...is an old question, but this may help Mac users.
If you are copying files from Time Machine manually, instead of restoring them through Time Machine, it'll add ACLs to everything, which can mess up your permissions.
For example, the section in this article that says "How to Fix Mac OS X File Permi...