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Using a bitmask in C#
... enum:
[Flags]
public enum Names
{
None = 0,
Susan = 1,
Bob = 2,
Karen = 4
}
Then you'd check for a particular name as follows:
Names names = Names.Susan | Names.Bob;
// evaluates to true
bool susanIsIncluded = (names & Names.Susan) != Names.None;
// evaluates to false
bool...
How can I list (ls) the 5 last modified files in a directory?
...
252
Try using head or tail. If you want the 5 most-recently modified files:
ls -1t | head -5
Th...
How do I determine the target architecture of static library (.a) on Mac OS X?
...
244
Another option is lipo; its output is brief and more readable than otool's.
An example:
% li...
Select DISTINCT individual columns in django?
...ass ProductOrder(models.Model):
product = models.CharField(max_length=20, primary_key=True)
category = models.CharField(max_length=30)
rank = models.IntegerField()
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All falsey values in JavaScript
...0.0, and hex form 0x0 (thanks RBT)
Zero of BigInt type: 0n and -0n (new in 2020, thanks GetMeARemoteJob)
"", '' and `` - strings of length 0
null
undefined
NaN
document.all (in HTML browsers only)
This is a weird one. document.all is a falsey object, with typeof as undefined. It was a Microsoft-p...
How to send JSON instead of a query string with $.ajax?
...
257
You need to use JSON.stringify to first serialize your object to JSON, and then specify the co...
“git diff” does nothing
...onfig file. This was installed via MacPorts and is the lates version (1.7.2.2).
5 Answers
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How does one use rescue in Ruby without the begin and end block
...
226
A method "def" can serve as a "begin" statement:
def foo
...
rescue
...
end
...
How to wait for 2 seconds?
...esn't explicitly lay out the required string format.
This will wait for 2 seconds:
WAITFOR DELAY '00:00:02';
The format is hh:mi:ss.mmm.
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