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Return 0 if field is null in MySQL
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@MarkByers can you show why Kevin's example in the comment is wrong and what it should actually be?
– Michael
Aug 10 '16 at 13:44
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How do I fetch lines before/after the grep result in bash?
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35
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How do I negate a test with regular expressions in a bash script?
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128
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How to customize a requirements.txt for multiple environments?
...der hierarchy like this:
`-- django_project_root
|-- requirements
| |-- common.txt
| |-- dev.txt
| `-- prod.txt
`-- requirements.txt
The files' contents would look like this:
common.txt:
# Contains requirements common to all environments
req1==1.0
req2==1.0
req3==1.0
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dev.txt:
# Spe...
git discard all changes and pull from upstream
... replace master? I only have one branch on my repo, which is master, and I completely messed it up, so I basically need to start over from the upstream. I think init will do the job, but is there an easier way?
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How to save and load cookies using Python + Selenium WebDriver
...iver
driver = selenium.webdriver.Firefox()
driver.get("http://www.google.com")
pickle.dump( driver.get_cookies() , open("cookies.pkl","wb"))
and later to add them back:
import pickle
import selenium.webdriver
driver = selenium.webdriver.Firefox()
driver.get("http://www.google.com")
cookies = ...
Is #pragma once part of the C++11 standard?
...eader inclusions in C++ was/is to use the #ifndef - #define - #endif pre-compiler directives scheme also called macro-guard scheme (see code snippet below).
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postgresql COUNT(DISTINCT …) very slow
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What is the difference between decodeURIComponent and decodeURI?
What is the difference between the JavaScript functions decodeURIComponent and decodeURI ?
7 Answers
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What do the python file extensions, .pyc .pyd .pyo stand for?
...s is normally the input source code that you've written.
.pyc: This is the compiled bytecode. If you import a module, python will build a *.pyc file that contains the bytecode to make importing it again later easier (and faster).
.pyo: This was a file format used before Python 3.5 for *.pyc files t...