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How to check a not-defined variable in JavaScript
...hing(variable)
{
var undef;
if(variable === undef)
{
alert('Hey moron, define this bad boy.');
}
}
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Opacity of div's background without affecting contained element in IE 8?
...
But be advised that rgba may not be supported by your required browsers.
Alert-free modal dialog functionality
But if you're after some kind of masking the whole page, this is usually done by adding a separate div with this set of styles:
position: fixed;
width: 100%;
height: 100%;
z-index: 1000...
GitHub pages are not updating
...ase, it was due to my app being an SPA, where updates are only made in Javascript, and not from index.html. Then again, I think the filenames have md5sum (or something) and should change if the file changes, so it should update the index.html script tag as well.
– jmjm
...
How can I drop all the tables in a PostgreSQL database?
...
You can write a query to generate a SQL script like this:
select 'drop table "' || tablename || '" cascade;' from pg_tables;
Or:
select 'drop table if exists "' || tablename || '" cascade;' from pg_tables;
In case some tables are automatically dropped due to ...
Finding a branch point with Git?
...he one of the histories be --first-parent, and I am using this method in a script that might sometimes use the same branches on both sides). I found it safer to use diff's if-then-else mode and erase changed/deleted lines from its output instead of counting on having big enough context., by: diff --...
Django DB Settings 'Improperly Configured' Error
...nage.py shell runs initially. One can add them to the start of the testing script or just run the tests using manage.py test.
Versions:
Python 3.5 (in virtualenv)
PyCharm 2016.3.2 Professional
Django 1.10
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How do I catch a PHP fatal (`E_ERROR`) error?
... <table>
<thead><th>Item</th><th>Description</th></thead>
<tbody>
<tr>
<th>Error</th>
<td><pre>$errstr</pre></td>
</tr>
...
How to get method parameter names?
...o="wiggity", bar="wack")
Run it, it will yield the following output:
C:\scripts>python decoratorExample.py
Calling doSomething with arguments ('beans', 'rice') and named arguments {'foo':
'wiggity', 'bar': 'wack'}
Doing something totally awesome with beans and rice.
...
How do I install PyCrypto on Windows?
... but have a 32-bit version of Python 2.7, the installer will fail with the alert "Python version 2.7 required, which was not found in the registry."
– Steve Saporta
Apr 30 '14 at 21:18
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What is the difference between char array and char pointer in C?
...red in the stack (relative to %rbp).
Note however that the default linker script puts .rodata and .text in the same segment, which has execute but no write permission. This can be observed with:
readelf -l a.out
which contains:
Section to Segment mapping:
Segment Sections...
02 .text ...