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Bootstrap select dropdown list placeholder
...he/she is asking for a bootstrap built-in solution
– Mehdi
Apr 1 '16 at 2:08
5
Also You can use d...
SQL Server 2008 can't login with newly created user
...hat the problem is resolved. It also contributes to a growing body of documentation that other developers can use to find their own answers in the future.
– Joe Mayo
Nov 13 '09 at 22:50
...
Changing column names of a data frame
I have a data frame called "newprice" (see below) and I want to change the column names in my program in R.
16 Answers
...
Adjusting and image Size to fit a div (bootstrap)
...d1 img {
width:100%;
height: 230px;
}
jsFiddle
...per your comment, you could also just block any overflow - see this example to see an image restricted by height and cut off because it's too wide.
.top1 {
height:390px;
background-color:#FFFFFF;
margin-top:10px;
overflo...
Relative imports in Python 2.7
...nce between directly running a Python file, and importing that file from somewhere else. Just knowing what directory a file is in does not determine what package Python thinks it is in. That depends, additionally, on how you load the file into Python (by running or by importing).
There are two wa...
What does jquery $ actually return?
I have read the JQuery documentation, and while much attention is devoted to what you should pass the function, I don't see any information on what it actually returns .
...
Apache POI Excel - how to configure columns to be expanded?
I am using Apache POI API to generate excel spreadsheet to output some data.
11 Answers
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What does map(&:name) mean in Ruby?
...
It's shorthand for tags.map(&:name.to_proc).join(' ')
If foo is an object with a to_proc method, then you can pass it to a method as &foo, which will call foo.to_proc and use that as the method's block.
The Symbol#to_proc method was originally added b...
How do I check if an HTML element is empty using jQuery?
I'm trying to call a function only if an HTML element is empty, using jQuery.
17 Answers
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Can't stop rails server
...n the PID column to kill the process:
For example:
$ kill -9 PID
And some of the other answers i found is:
To stop the rails server while it's running, press:
CTRL-C
CTRL-Z
You will get control back to bash. Then type (without the $):
$ fg
And this will go back into the process, and then ...