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Test if a command outputs an empty string
...ds don’t return values – they output them. You can capture this output by using command substitution; e.g. $(ls -A). You can test for a non-empty string in Bash like this:
if [[ $(ls -A) ]]; then
echo "there are files"
else
echo "no files found"
fi
Note that I've used -A rather than -...
Where can I find the TypeScript version installed in Visual Studio?
...ons 1.0, 1.8 and 2.2:
B. Check which version of Typescript is requested by your project. In *.csproj file, look for <TypeScriptToolsVersion> tag, or you can add it if it is missing, like this
<PropertyGroup>
...
<TypeScriptToolsVersion>1.8</TypeScriptTo...
How to convert an int to a hex string?
...hr does not involve ASCII at all--it simply takes a number and makes a one-byte bytestring where the ordinal value of the byte is the number. ASCII and ASCII-compatible encodings come into play when you write and display bytestrings.
– Mike Graham
Nov 22 '12 at...
Ignore parent padding
...
In large this question has been answered but in small parts by everyone. I dealt with this just a minute ago.
I wanted to have a button tray at the bottom of a panel where the panel has 30px all around. The button tray had to be flush bottom and sides.
.panel
{
padding: 30px;
}
...
Changing Jenkins build number
... job completes? The problem is that are product builds are NOT being done by Jenkins, so we want to be able to get the build number(ie. from a text file) and update the build number in Jenkins to match it. I have tried to set the build number:
...
:after vs. ::after
...at the issue of support for (at least this) CSS3 tag is almost a non-issue by now.
– DRosenfeld
Feb 25 '16 at 12:06
1
...
Calculate RSA key fingerprint
...For example:
ssh-keygen -lf ~/.ssh/id_dsa.pub
1024 SHA256:19n6fkdz0qqmowiBy6XEaA87EuG/jgWUr44ZSBhJl6Y (DSA)
If you need to compare it against an old fingerprint you also need to specify to use the MD5 fingerprint hashing function.
ssh-keygen -E md5 -lf ~/.ssh/id_dsa.pub
2048 MD5:4d:5b:97:19:8c:...
Nginx not picking up site in sites-enabled?
...t certain versions of nginx allows including/linking to other files purely by having a single line with the relative path to the included file. (At least that's what it looked like in some "inherited" config files I've been using, until a new nginx version broke them.)
In sites-enabled/default (old...
Interface or an Abstract Class: which one to use?
...approach that's common when you're uncertain which way to go (as mentioned by cletus below) is to create an interface, and then have your abstract class implement that interface.
share
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improve t...
Enable zooming/pinch on UIWebView
...superb answer. It made even those pages zoom which were not getting zoomed by just setting the "Scales page to fit" property.
– GKK
Nov 2 '16 at 9:41
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