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Why is using 'eval' a bad practice?
...tice. Just to name a few reasons:
There is almost always a better way to do it
Very dangerous and insecure
Makes debugging difficult
Slow
In your case you can use setattr instead:
class Song:
"""The class to store the details of each song"""
attsToStore=('Name', 'Artist', 'Album', 'Genr...
Is null reference possible?
...ing the null pointer)
As Johannes says in a deleted answer, there's some doubt whether "dereferencing a null pointer" should be categorically stated to be undefined behavior. But this isn't one of the cases that raise doubts, since a null pointer certainly does not point to a "valid object or func...
How to make a python, command-line program autocomplete arbitrary things NOT interpreter
...d("tab: complete")
readline.set_completer(completer)
The official module docs aren't much more detailed, see the readline docs for more info.
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bootstrap popover not showing on top of all elements
... While this sorts out the original z-index issue, the popover doesn't stick with the original trigger element once you start dragging things around the screen, zooming in or out, or resizing the window. Looking for a better answer for this myself.
– MSC
...
How to call a PHP function on the click of a button
...submit" class="button" name="select" value="select" />
jQuery:
$(document).ready(function(){
$('.button').click(function(){
var clickBtnValue = $(this).val();
var ajaxurl = 'ajax.php',
data = {'action': clickBtnValue};
$.post(ajaxurl, data, function (re...
What's the difference between URI.escape and CGI.escape?
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ruby-doc.org/stdlib-2.0.0/libdoc/uri/rdoc/URI/Escape.html. There is URI.escape module in ruby 2.0.0. Why was it deprecated?
– user938363
Nov 4 '13 at 19:34
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Font scaling based on width of container
... font-size: 4vw;
}
As you can see, when the viewport width increases, so do the font-size, without needing to use media queries.
These values are a sizing unit, just like px or em, so they can be used to size other elements as well, such as width, margin, or padding.
Browser support is pretty go...
Reorder / reset auto increment primary key
...
mySQL Doc advises against this: " As a general rule, other than in SET statements, you should never assign a value to a user variable and read the value within the same statement. For example, to increment a variable, this is okay...
Two way sync with rsync
...n.edu/~bcpierce/unison/
Syntax:
unison dirA/ dirB/
Unison asks what to do when files are different, but you can automate the process by using the following which accepts default (nonconflicting) options:
unison -auto dirA/ dirB/
unison -batch dirA/ dirB/ asks no questions at all, and writes to...
How to change Git log date formats
...e is no built-in way that I know of to create a custom format, but you can do some shell magic.
timestamp=`git log -n1 --format="%at"`
my_date=`perl -e "print scalar localtime ($timestamp)"`
git log -n1 --pretty=format:"Blah-blah $my_date"
The first step here gets you a millisecond timestamp. You...