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How do I test if a string is empty in Objective-C?
...heck if it's a valid but empty string (@"") as well as if it's nil, since calling length on nil will also return 0.
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How to strike through obliquely with css
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And what about all the browsers that don't support CSS3 transforms?
– Mooseman
Jan 29 '13 at 22:54
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Rename Pandas DataFrame Index
...ust a gentle reminder that without "inplace =True", df1.rename would not really change anything.
– Sarah
Sep 29 '19 at 15:35
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In Gradle, how do I declare common dependencies in a single place?
... pom, you needn't re-declare the version; just artifact and groupId. Basically it tells maven "I need X:Y, but use whatever version the parent has configured."
– Michael Campbell
Apr 19 '13 at 23:14
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Get environment variable value in Dockerfile
... Very nice solution! On a Mac you can get envsubst as part of brew install gettext. But because of possible conflicts with the BSD build system it is "keg-only" and no symlnks are made. However, it is safe to do ln -s /usr/local/Cellar/gettext/*/bin/envsubst /usr/local/bin/ to add that one comma...
how to use sed, awk, or gawk to print only what is matched?
...use -E sed option to trigger modern RE format. Check re_format(7), specifically last paragraph of DESCRIPTION developer.apple.com/library/mac/#documentation/Darwin/Reference/…
– anddam
Mar 3 '13 at 16:33
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How to make the corners of a button round?
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can we do this programmatically.
– Killer
Jul 24 '15 at 15:00
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How do I make the whole area of a list item in my navigation bar, clickable as a link?
...chor tag contain the padding rather than the li. This way, it will take up all the area.
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Tree view of a directory/folder in Windows? [closed]
...mand prompt you can use "tree /F" to view a tree of the current folder and all descending files & folders.
In File Explorer under Windows 8.1:
Select folder
Press Shift, right-click mouse, and select "Open command window here"
Type tree /f > tree.txt and press Enter
Use MS Word to open "tr...
Is there replacement for cat on Windows
... equivalent of:
cat file1 file2 > file3
Example 2:
type *.vcf > all_in_one.vcf
This command will merge all the vcards into one.
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