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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
...
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...
How to read a single character from the user?
Is there a way of reading one single character from the user input? For instance, they press one key at the terminal and it is returned (sort of like getch() ). I know there's a function in Windows for it, but I'd like something that is cross-platform.
...
When saving, how can you check if a field has changed?
...gs, **kwargs)
self.__original_name = self.name
def save(self, force_insert=False, force_update=False, *args, **kwargs):
if self.name != self.__original_name:
# name changed - do something here
super(Person, self).save(force_insert, force_update, *args, **kwa...
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...
Concatenating two lists - difference between '+=' and extend()
...E_ADD.
It's really nothing you should be worrying about, unless you're performing this operation billions of times. It is likely, however, that the bottleneck would lie some place else.
share
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imp...
Is bool a native C type?
...ed). ANSI, as usual, has adopted the ISO C11 standard as an ANSI standard. For historical reasons, the phrase "ANSI C" commonly (but incorrecetly) refers to the language defined by the ANSI C89 / ISO C90 standard. Since C standards are now published by ISO first, and since there have been three ISO ...
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 .
...
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...
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
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