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What's the difference between => , ()=>, and Unit=>
... value (I'm simulating the setTimeout function in JavaScript, if you must know.)
4 Answers
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A migration to add unique constraint to a combination of columns
...uble tap on an api heavy app) I have two identical records in my DB right now and the model has the validation..
– baash05
Mar 17 '15 at 1:26
6
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What is Cache-Control: private?
... sort of caching hints:
they forgot to include Expires, so the browser knows to use the cached copy until that date
they forgot to include Max-Age, so the browser knows how long the cached item is good for
they forgot to include E-Tag, so the browser can do a conditional request
But they did in...
How to copy an object in Objective-C
...lways with reference types, there are two notions of "copy". I'm sure you know them, but for completeness.
A bitwise copy. In this, we just copy the memory bit for bit - this is what NSCopyObject does. Nearly always, it's not what you want. Objects have internal state, other objects, etc, and ofte...
Why aren't variable-length arrays part of the C++ standard?
...ally has only little space available, isn't good. The argument is, if you know the size beforehand, you can use a static array. And if you don't know the size beforehand, you will write unsafe code.
C99 VLAs could provide a small benefit of being able to create small arrays without wasting space o...
Why Qt is misusing model/view terminology?
... opinion, the people who invented MVC should be turned to when we want to know how it is supposed to be implemented "correctly". In the original smalltalk paper it says:
The view manages the graphical and/or textual output to the portion of the bitmapped display that is allocated to its applica...
Static variables in member functions
...only to those types. e.g. template<typename T> void foo (T t) {...}. Now for foo<int> there will be a static int i (say foo<int>::i) and separate for foo<string> there will be a separate static int i (say foo<string>::i) and so on. i will be incremented separately for f...
Differences between git remote update and fetch?
...Original answer with more details
xenoterracide's answer is 3.5 years old now, and Git has gone through several versions since then (it has gone from v1.6.5.5 to v1.8.3.2 as of this writing), and looking at the current documentation for git remote update and git fetch, it looks like they both can p...
How do I find the duplicates in a list and create another list with them?
...q):
seen = set()
seen_add = seen.add
# adds all elements it doesn't know yet to seen and all other to seen_twice
seen_twice = set( x for x in seq if x in seen or seen_add(x) )
# turn the set into a list (as requested)
return list( seen_twice )
a = [1,2,3,2,1,5,6,5,5,5]
list_duplicates(a...
Parallel.ForEach vs Task.Factory.StartNew
...heduler, by default, uses the new ThreadPool, which handles this very well now.
– Reed Copsey
Feb 17 '11 at 16:42
Than...