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Bash empty array expansion with `set -u`
....4.
$ bash --version | head -n 1
GNU bash, version 4.4.19(1)-release (x86_64-pc-linux-gnu)
$ set -u
$ arr=()
$ echo "foo: '${arr[@]}'"
foo: ''
There is a conditional you can use inline to achieve what you want in older versions: Use ${arr[@]+"${arr[@]}"} instead of "${arr[@]}".
$ function a...
Does Java have something like C#'s ref and out keywords?
...**************************
/**
*
* @author jsimms
*/
/*
XOBJ is the base object that houses the value. XREF and XOUT are classes that
internally use XOBJ. The classes XOBJ, XREF, and XOUT have methods that allow
the object to be used as XREF or XOUT parameter; This is important, becau...
Check if a string is html or not
...tp://regex101.com/r/cX0eP2
Update:
Complete validation with:
/<(br|basefont|hr|input|source|frame|param|area|meta|!--|col|link|option|base|img|wbr|!DOCTYPE).*?>|<(a|abbr|acronym|address|applet|article|aside|audio|b|bdi|bdo|big|blockquote|body|button|canvas|caption|center|cite|code|colg...
Auto expand a textarea using jQuery
...Compare the effect with the other auto expanding textarea plugin....
edit based on comment
$(function() {
$('#txtMeetingAgenda').autogrow();
});
note: you should include the needed js files...
To prevent the scrollbar in the textarea from flashing on & off during expansion/contraction, y...
How to declare a global variable in php?
...closure = (function($bar) use ($foo) {
echo "$foo $bar";
})("York");
demo |
info
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Why is WinRT unmanaged? [closed]
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WinRT is a replacement for the age-old C-based Winapi. It is an api that must be usable in many runtime environments. Back 20 years ago, a C api was relatively easy to interop with. That has moved on since then, COM became the universal glue in the last half of t...
An error occurred while installing pg (0.17.1), and Bundler cannot continue
...gem install pg fails, try the following command:
env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config
... from the PostgreSQL.app Documentation
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How do I horizontally center an absolute positioned element inside a 100% width div? [duplicate]
...osition:absolute;
width:50px;
left:50%;
margin-left:-25px;
}
DEMO
If you would like to not use calculations you can do this:
#logo {
background:red;
width:50px;
height:50px;
position:absolute;
left: 0;
right: 0;
margin: 0 auto;
}
DEMO2
...
Get difference between 2 dates in JavaScript? [duplicate]
...) solution. I'd be interested to know if there is a simple arithmetic/math based solution instead of having to instantiate the two new Date objects. That could potentially be faster.
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R: rJava package install failing
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I am on R 2.15.3 ubuntu 12.04.2 64bit. when I update.packages() I get i notice that there is a rJava update. Installation from within R fails. When I apt-get install r-cran-rjava there is no update available. Why is this happening?
– E...