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How does this JavaScript/jQuery syntax work: (function( window, undefined ) { })(window)?
... redefined to any value. This technique is to prevent all undefined checks from breaking if someone wrote say, undefined = 10 somewhere. An argument that is never passed is guaranteed to be real undefined irrespective of the value of the variable undefined.
The reason to pass window can be illustra...
Get free disk space
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Working code snippet using GetDiskFreeSpaceEx from link by RichardOD.
// Pinvoke for API function
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool GetDiskFreeSpaceEx(string lpDirec...
How to get arguments with flags in Bash
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This example uses Bash's built-in getopts command and is from the Google Shell Style Guide:
a_flag=''
b_flag=''
files=''
verbose='false'
print_usage() {
printf "Usage: ..."
}
while getopts 'abf:v' flag; do
case "${flag}" in
a) a_flag='true' ;;
b) b_flag='true' ;;
...
Render a string in HTML and preserve spaces and linebreaks
...p that has a details page. As part of that I have a description (retrieved from a db) that has spaces and new lines. When it is rendered the new lines and spaces are ignored by the html. I would like to encode those spaces and new lines so that they aren't ignored.
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When should I use the Visitor Design Pattern? [closed]
... sure they do explain it – it’s the same advantage that you always get from subclassing / runtime polymorphism over switch: switch hard-codes the decision making at the client side (code duplication) and doesn’t offer static type checking (check for completeness and distinctness of cases etc.)...
Django development IDE [closed]
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There is PyCharm from JetBrains which supports Django and Google Apps. It looks promising.
Note: You need to buy a license for the Professional version if you want Django support. The Community version desn't support Django.
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So, JSONP or CORS? [closed]
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I recently developed a web app, using jquery and backbone.js, which reads from various cross-domain web services that we control, and ended up using Json-P instead of CORS because we need to support IE7 and it was a bit simpler on the server side (we run Django w/ DjangoRestFramework), and virtuall...
Python's os.makedirs doesn't understand “~” in my path
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You can now do it like
from srbib import abs_path
my_dir = abs_path('~/path/to/dir')
if not os.path.exists(my_dir):
os.makedirs(my_dir)
Please refer to https://stackoverflow.com/a/54190233/6799074 for usage of srblib.abs_path
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Create a new Ruby on Rails application using MySQL instead of SQLite
...sql database, go to cd another_name/config/ and copy the database.yml file from this new app. Paste it into the database.yml of your_app_name app. But ensure to change the database names and set username/password of your database accordingly in the database.yml file after doing so.
OR
Go to cd y...
Iteration over std::vector: unsigned vs signed index variable
...to return size_t :) i don't understand you. if i were to subtract pointers from each other, difference_type would be the right choice.
– Johannes Schaub - litb
Jan 4 '09 at 9:38
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