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How to check for an undefined or null variable in JavaScript?
...se
> Boolean(undefined) //false
all return false, which is similar to Python's check of empty variables.
So if you want to write conditional logic around a variable, just say
if (Boolean(myvar)){
// Do something
}
here "null" or "empty string" or "undefined" will be handled efficiently.
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MySQL “incorrect string value” error when save unicode string in Django
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If you have this problem here's a python script to change all the columns of your mysql database automatically.
#! /usr/bin/env python
import MySQLdb
host = "localhost"
passwd = "passwd"
user = "youruser"
dbname = "yourdbname"
db = MySQLdb.connect(host=hos...
What is the purpose of fork()?
...esses. For example, every time you use a command like subprocess.Popen in Python, you fork a child process and read its output. This enables programs to work together.
Typical usage of fork in a shell might look something like this:
int child_process_id = fork();
if (child_process_id) {
// ...
Date ticks and rotation in matplotlib
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I just tested with python3.6 and matplotlib v2.2.2 and it works too.
– Pablo Reyes
Apr 4 '19 at 23:35
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Getting the return value of Javascript code in Selenium
...ion in my webpage and I want to call that and get the return value into my Python code, what can I call to do that?
2 Answe...
Can I squash commits in Mercurial?
...eError: name 'execfile' is not defined"—which means evolve is written in Python 2, which is basically the stone age.
– Neil G
Apr 27 '18 at 15:21
1
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Why sizeof int is wrong, while sizeof(int) is right?
...t 30 '12 at 23:44
Fabrício Matté
63.9k2222 gold badges115115 silver badges156156 bronze badges
answered Oct 29 '12 at 12:53
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How can I see the current value of my $PATH variable on OS X?
...ched in the following order:
/usr/local/share/npm/bin
/Library/Frameworks/Python.framework/Versions/2.7/bin
/usr/local/bin
/usr/local/sbin
~/bin
/Library/Frameworks/Python.framework/Versions/Current/bin
/usr/bin
/bin
/usr/sbin
/sbin
/usr/local/bin
/opt/X11/bin
/usr/local/git/bin
To me this list a...
What is the difference between os.path.basename() and os.path.dirname()?
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E.g.: The basename of '/foo/bar/item' returns 'item'
From: http://docs.python.org/2/library/os.path.html#os.path.basename
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How to get the last element of a slice?
...hanks a bunch! Even though it does seem silly they didn't add the -1 index Python has...
– Morgan Wilde
Mar 20 '14 at 15:00
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