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Convert NSDate to NSString
... @zekel I'm not sure what the documentation used to say, but now it suggests init in multiple places.
– Neal Ehardt
Aug 20 '12 at 21:03
2
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VIM Replace word with contents of paste buffer?
...that'd get overwritten by the change command.)
Registers are generally specified by typing " then the name (single character) of the register, like "ay then "ap to yank into register a, then put the contents of register a. Same goes for a change command. In this case, if you don't want the text you ...
Grab a segment of an array in Java without creating a new array on heap
...have to create a new byte array in the heap memory just to do that. Right now I have the following code:
15 Answers
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How to print the contents of RDD?
...
If you want to view the content of a RDD, one way is to use collect():
myRDD.collect().foreach(println)
That's not a good idea, though, when the RDD has billions of lines. Use take() to take just a few to print out:
myRDD...
How to clear MemoryCache?
...ng MemoryCache.Default... MSDN's MemoryCache documentation makes me wonder if disposing and recreating is recommended: "Do not create MemoryCache instances unless it is required. If you create cache instances in client and Web applications, the MemoryCache instances should be created early in the ap...
Tools to get a pictorial function call graph of code [closed]
...tool to visualize callgrind data.
kcachegrind callgrind.out.1234
You are now left inside an awesome GUI program that contains a lot of interesting performance data.
On the bottom right, select the "Call graph" tab. This shows an interactive call graph that correlates to performance metrics in oth...
What is Weak Head Normal Form?
...a constructor, stop.
To avoid building these large expressions when we know all the subexpressions will have to be evaluated, we want to force the inner parts to be evaluated ahead of time.
seq
seq is a special function that is used to force expressions to be evaluated. Its semantics are that s...
remove objects from array by object property
...i < arrayOfObjects.length; i++) {
var obj = arrayOfObjects[i];
if (listToDelete.indexOf(obj.id) !== -1) {
arrayOfObjects.splice(i, 1);
}
}
All you need to do to fix the bug is decrement i for the next time around, then (and looping backwards is also an option):
for (var i ...
How to sort objects by multiple keys in Python?
...post I just
referenced influenced each other in some way, though I don't know which order.
In case the link dies here's a very quick synopsis of examples not covered above:
mylist = sorted(mylist, key=itemgetter('name', 'age'))
mylist = sorted(mylist, key=lambda k: (k['name'].lower(), k['age']))
...
Is it better in C++ to pass by value or pass by constant reference?
...ecially true before the existence of move semantics. The reason is simple: if you passed by value, a copy of the object had to be made and, except for very small objects, this is always more expensive than passing a reference.
With C++11, we have gained move semantics. In a nutshell, move semantics...