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Casting vs using the 'as' keyword in the CLR
... it's worth using which.
Don't do this:
// Bad code - checks type twice for no reason
if (randomObject is TargetType)
{
TargetType foo = (TargetType) randomObject;
// Do something with foo
}
Not only is this checking twice, but it may be checking different things, if randomObject is a f...
When to use in vs ref vs out
...he difference between the ref and out keywords (that has been asked before ) and the best explanation seems to be that ref == in and out , what are some (hypothetical or code) examples where I should always use out and not ref .
...
Getter and Setter?
... the direct link to the right part of the page: php.net/manual/en/… (+1 for a correct answer)
– Computerish
Dec 18 '10 at 15:41
28
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How to write inline if statement for print?
...ec If Python doesn't have a trailing if, then why does this work: print [i for i in range(10) if i%2]? I wish they'd allow it outside of comprehensions...
– mbomb007
Sep 26 '15 at 22:13
...
Syntax Error: Not a Chance
...
For folks puzzled by "not a chance", which is slang, it means that there is no possibility or probability of the thing happening.
– DOK
Jul 23 '13 at 13:43
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Is inject the same thing as reduce in ruby?
...ey the same thing? Why does Ruby have so many aliases (such as map/collect for arrays)? Thanks a lot.
2 Answers
...
How to make a variadic macro (variable number of arguments)
...
I don't think C99 requires the ## before VA_ARGS. That might just be VC++.
– Chris Lutz
Mar 25 '09 at 2:18
98
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How to duplicate sys.stdout to a log file?
...
Since you're comfortable spawning external processes from your code, you could use tee itself. I don't know of any Unix system calls that do exactly what tee does.
# Note this version was written circa Python 2.6, see below for
# an update...
When I catch an exception, how do I get the type, file, and line number?
...
Simplest form that worked for me.
import traceback
try:
print(4/0)
except ZeroDivisionError:
print(traceback.format_exc())
Output
Traceback (most recent call last):
File "/path/to/file.py", line 51, in <module>
...
How do I check if an object has a specific property in JavaScript?
...give you completely misleading results.
It depends on what you're looking for. If you want to know if an object physically contains a property (and it is not coming from somewhere up on the prototype chain) then object.hasOwnProperty is the way to go. All modern browsers support it. (It was missing...