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JavaScript: empty array, [ ] evaluates to true in conditional structures. Why is this?
...tring)
null
undefined
NaN (a special Number value meaning Not-a-Number!)
All other values are truthy, including "0" (zero in quotes), "false" (false in quotes), empty functions, empty arrays, and empty objects.
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Java Delegates?
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Not really, no.
You may be able to achieve the same effect by using reflection to get Method objects you can then invoke, and the other way is to create an interface with a single 'invoke' or 'execute' method, and then instantiate...
How to efficiently build a tree from a flat structure?
... objects in a hash table mapping to the specific object. Enumerate through all the objects and find their parent if it exists and update its parent pointer accordingly.
class MyObject
{ // The actual object
public int ParentID { get; set; }
public int ID { get; set; }
}
class Node
{
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Calling a parent window function from an iframe
I want to call a parent window JavaScript function from an iframe.
10 Answers
10
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Adding a user to a group in django
... I would expect to see in a section of the docs under auth for programmatically creating groups. instead all there is is a weak paragraph: docs.djangoproject.com/en/1.3/topics/auth/#groups I guess it helps to keep in mind that the auth models are just regular models, and the standard model reference...
How to toggle a boolean?
Is there a really easy way to toggle a boolean value in javascript ?
6 Answers
6
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Import CSV file into SQL Server
...was everything I'm looking for: I don't seem to be able to configure it at all!
– Auspex
May 14 '19 at 15:58
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Setting the correct encoding when piping stdout in Python
...you must encode it yourself.
A rule of thumb is: Always use Unicode internally. Decode what you receive, and encode what you send.
# -*- coding: utf-8 -*-
print u"åäö".encode('utf-8')
Another didactic example is a Python program to convert between ISO-8859-1 and UTF-8, making everything upper...
Changing variable names in Vim
... +1 very good vimgineering (I think I just coined a new term). Note: I actually needed to press colon (:) twice. The first time I pressed it, I saw :'<,'>. If I just typed s/ from there it didn't work; I had to type another colon before the s/.
– Kelvin
M...
target input by type and name (selector)
I need to change some checkbox inputs to hidden inputs for some but not all inputs on a page.
3 Answers
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