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Really Cheap Command-Line Option Parsing in Ruby
EDIT: Please, please , please read the two requirements listed at the bottom of this post before replying. People keep posting their new gems and libraries and whatnot, which clearly don't meet the requirements.
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Is it better to return null or empty collection?
...s.
This sucks:
if(myInstance.CollectionProperty != null)
{
foreach(var item in myInstance.CollectionProperty)
/* arrgh */
}
It is considered a best practice to NEVER return null when returning a collection or enumerable. ALWAYS return an empty enumerable/collection. It prevents the afore...
When should I use jQuery's document.ready function?
...cess a dom element (an anchor, an img etc), you will not be able to access it because html is interpreted from top to bottom and your html elements are not present when your jQuery code runs.
To overcome this problem, we place every jQuery/javascript code (which uses DOM) inside $(document).ready f...
Linq style “For Each” [duplicate]
...ult as the above use of ToList, but is (in theory) more efficient, because it streams the values directly to the delegate.
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What is __future__ in Python used for and how/when to use it, and how it works
... modules. I do not understand what __future__ is for and how/when to use it even after reading the Python's __future__ doc .
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Why use bzero over memset?
...previous semester, we had to implement a basic client/server in C. When initializing the structs, like sock_addr_in , or char buffers (that we used to send data back and forth between client and server) the professor instructed us to only use bzero and not memset to initialize them. He never ...
Postgresql: Scripting psql execution with password
How can I call psql so that it doesn't prompt for a password ?
15 Answers
15
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CORS - What is the motivation behind introducing preflight requests?
...g confused as to the purpose of the preflight request but I think I've got it now.
The key insight is that preflight requests are not a security thing. Rather, they're a not-changing-the-rules thing.
Preflight requests have nothing to do with security, and they have no bearing on applications th...
The name 'InitializeComponent' does not exist in the current context
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I've encountered this a couple times and keep forgetting what causes it.
I ran into this when I renamed the namespace on my code behind file but not in my XAML.
So check if you've done the same.
The namespace and class names need to match since they are both part of a partial class
namesp...
Counting the number of True Booleans in a Python List
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2
This is actually more efficient than sum, as well as being more explicit about the intent, so there's no reason to use sum:
In [1]: import random
In [2]: x = [random.choice([True, False]) for i in range(100)]
In [3]: %timeit x.count(True)
970 ns ± 41.1 ns per loop (mean ± std. dev. of 7 ru...