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How to compare Unicode characters that “look alike”?
I fall into a surprising issue.
10 Answers
10
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What exactly is a Maven Snapshot and why do we need it?
...ocal repository, to make it available for the next builds.
For example, a foo-1.0.jar library is considered as a stable version, and if Maven finds it in the local repository, it will use this one for the current build.
Now, if you need a foo-1.0-SNAPSHOT.jar library, Maven will know that this ver...
SQL JOIN - WHERE clause vs. ON clause
After reading it, this is not a duplicate of Explicit vs Implicit SQL Joins .
The answer may be related (or even the same) but the question is different.
...
What is the difference between properties and attributes in HTML?
...own values (e.g., the valid types of an input). If you had <input type="foo">, then theInput.getAttribute("type") gives you "foo" but theInput.type gives you "text".
In contrast, the value property doesn't reflect the value attribute. Instead, it's the current value of the input. When the user...
Sass calculate percent minus px
...need to use calc() instead. Check browser compatibility on Can I use...
.foo {
height: calc(25% - 5px);
}
If your values are in variables, you may need to use interpolation turn them into strings (otherwise Sass just tries to perform arithmetic):
$a: 25%;
$b: 5px;
.foo {
width: calc(#{$a...
Is errno thread-safe?
In errno.h , this variable is declared as extern int errno; so my question is, is it safe to check errno value after some calls or use perror() in multi-threaded code. Is this a thread safe variable? If not, then whats the alternative ?
...
jQuery equivalent of JavaScript's addEventListener method
...losest thing would be the bind function:
http://api.jquery.com/bind/
$('#foo').bind('click', function() {
alert('User clicked on "foo."');
});
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How to check if field is null or empty in MySQL?
I am trying to figure out how to check if a field is NULL or empty . I have this:
7 Answers
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Better to 'try' something and catch the exception or test if it's possible first to avoid an excepti
... a directory exists, do not do this:
import os, sys
if not os.path.isdir('foo'):
try:
os.mkdir('foo')
except OSError, e
print e
sys.exit(1)
If another thread or process creates the directory between isdir and mkdir, you'll exit. Instead, do this:
import os, sys, errno
try:
os....
How to retrieve a user environment variable in CMake (Windows)
...ke script
You can pass a variable on the line with the cmake invocation:
FOO=1 cmake
or by exporting a variable in BASH:
export FOO=1
Then you can pick it up in a cmake script using:
$ENV{FOO}
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