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Adding data attribute to DOM
...o', '222');
Note that this doesn't create an actual data-info attribute. If you need to create the attribute, use .attr():
$('div').attr('data-info', '222');
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How to do something before on submit? [closed]
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If you have a form as such:
<form id="myform">
...
</form>
You can use the following jQuery code to do something before the form is submitted:
$('#myform').submit(function() {
// DO STUFF...
return tru...
Read values into a shell variable from a pipe
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Use
IFS= read var << EOF
$(foo)
EOF
You can trick read into accepting from a pipe like this:
echo "hello world" | { read test; echo test=$test; }
or even write a function like this:
read_from_pipe() { read "$@" <&a...
Use rvmrc or ruby-version file to set a project gemset with RVM?
I use RVM, the Ruby Version Manager to specify a Ruby version and a set of gems for each of my Rails projects.
5 Answers
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What is the best way to use a HashMap in C++?
...rgv)
{
std::map<std::string, int> m;
m["hello"] = 23;
// check if key is present
if (m.find("world") != m.end())
std::cout << "map contains key world!\n";
// retrieve
std::cout << m["hello"] << '\n';
std::map<std::string, int>::iterator i = m.find("hel...
How to change plot background color?
...fig.add_subplot(1, 1, 1) # nrows, ncols, index
You used the stateful API (if you're doing anything more than a few lines, and especially if you have multiple plots, the object-oriented methods above make life easier because you can refer to specific figures, plot on certain axes, and customize eith...
VIM ctrlp.vim plugin: how to rescan files?
...and hit F5 to refresh right then. It will automatically show you the match if the file was just added to the ctrl-p cache.
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What is the best way to implement “remember me” for a website? [closed]
...tandard session management cookie.
The login cookie contains a series identifier and a token. The series and token are unguessable random numbers from a suitably large space. Both are stored together in a database table, the token is hashed (sha256 is fine).
When a non-logged-in user visits the site...
Batch: Remove file extension
...ho %%~nf
)
pause
The following options are available:
Variable with modifier Description
%~I Expands %I which removes any surrounding
quotation marks ("").
%~fI Expands %I to a fully qualified path name.
%~dI Ex...
Django gives Bad Request (400) when DEBUG = False
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The ALLOWED_HOSTS list should contain fully qualified host names, not urls. Leave out the port and the protocol. If you are using 127.0.0.1, I would add localhost to the list too:
ALLOWED_HOSTS = ['127.0.0.1', 'localhost']
You could also use * to match any host:
ALLOWE...