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How to modify a global variable within a function in bash?
... are two ways to pass values from a subshell to its parent. First, you can output something to stdout, then capture it with a command substitution:
myfunc() {
echo "Hello"
}
var="$(myfunc)"
echo "$var"
Gives:
Hello
For a numerical value from 0-255, you can use return to pass the number a...
“Pretty” Continuous Integration for Python
This is a slightly.. vain question, but BuildBot's output isn't particularly nice to look at..
14 Answers
...
In Python, if I return inside a “with” block, will the file still close?
...ver, that you cannot easily catch exceptions thrown by the open() call without putting the whole with block inside a try..except block which is usually not what one wants.
share
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improve this answe...
How to strip HTML tags from string in JavaScript? [duplicate]
...t of your input. As other knowledgable and mostly sane people have pointed out, to safely strip tags, you must use a parser.
If you do not have acccess to a convenient parser like the DOM, and you cannot trust your input to be in the right format, you may be better off using a package like sanitize-...
list.clear() vs list = new ArrayList(); [duplicate]
...
It's hard to know without a benchmark, but if you have lots of items in your ArrayList and the average size is lower, it might be faster to make a new ArrayList.
http://www.docjar.com/html/api/java/util/ArrayList.java.html
public void clear() {...
How to fix “Headers already sent” error in PHP
...
No output before sending headers!
Functions that send/modify HTTP headers must be invoked before any output is made.
summary ⇊
Otherwise the call fails:
Warning: Cannot modify header information - headers already sent (ou...
Reset local repository branch to be just like remote repository HEAD
...the branch named "master" in the remote repo matches the currently checked-out branch in your local repo.
BTW, this situation that you're in looks an awful lot like a common case where a push has been done into the currently checked out branch of a non-bare repository. Did you recently push into you...
Retrieve the maximum length of a VARCHAR column in SQL Server
...
Watch out!! If there's spaces they will not be considered by the LEN method in T-SQL. Don't let this trick you and use
select max(datalength(Desc)) from table_name
...
memcpy() vs memmove()
...
Both memcpy and memove do similar things.
But to sight out one difference:
#include <memory.h>
#include <string.h>
#include <stdio.h>
char str1[7] = "abcdef";
int main()
{
printf( "The string: %s\n", str1 );
memcpy( (str1+6), str1, 10 );
printf( "Ne...
When a 'blur' event occurs, how can I find out which element focus went *to*?
...he technique Michiel ended up using:
function showBlur(ev)
{
// Use timeout to delay examination of activeElement until after blur/focus
// events have been processed.
setTimeout(function()
{
var target = document.activeElement;
document.getElementById("focused").value =
tar...