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UIPanGestureRecognizer - Only vertical or horizontal
...omeView];
return fabs(velocity.y) > fabs(velocity.x);
}
And for Swift:
func gestureRecognizerShouldBegin(_ gestureRecognizer: UIPanGestureRecognizer) -> Bool {
let velocity = gestureRecognizer.velocity(in: someView)
return abs(velocity.x) > abs(velocity.y)
}
...
What do the following phrases mean in C++: zero-, default- and value-initialization?
...doesn't exist in the original 1998 standard (I think it might be the only difference that's more than a clarification). See Kirill V. Lyadvinsky's answer for the definitions straight from the standard.
See this previous answer about the behavior of operator new for details on the the different beh...
Early exit from function?
...
You can just use return.
function myfunction() {
if(a == 'stop')
return;
}
This will send a return value of undefined to whatever called the function.
var x = myfunction();
console.log( x ); // console shows undefined
Of course, you can specify a different ...
Paging in a Rest Collection
...m running into is how to handle the GET operation on the collection root if the collection is large.
12 Answers
...
Reading Xml with XmlReader in C#
...del instead? I've found that LINQ to XML makes XML work much much easier.
If your document is particularly huge, you can combine XmlReader and LINQ to XML by creating an XElement from an XmlReader for each of your "outer" elements in a streaming manner: this lets you do most of the conversion work ...
How to break out from a ruby block?
...
Use the keyword next. If you do not want to continue to the next item, use break.
When next is used within a block, it causes the block to exit immediately, returning control to the iterator method, which may then begin a new iteration by invokin...
What is the “assert” function?
...erminate the program (usually with a message quoting the assert statement) if its argument turns out to be false. It's commonly used during debugging to make the program fail more obviously if an unexpected condition occurs.
For example:
assert(length >= 0); // die if length is negative.
You...
How do I check if a variable exists in a list in BASH
...
May give false positive if the user input contains regular expression special characters, for example x=.
– glenn jackman
Nov 9 '11 at 11:41
...
How to check visibility of software keyboard in Android?
I need to do a very simple thing - find out if the software keyboard is shown. Is this possible in Android?
42 Answers
...
Finding all possible combinations of numbers to reach a given sum
...subset_sum(numbers, target, partial=[]):
s = sum(partial)
# check if the partial sum is equals to target
if s == target:
print "sum(%s)=%s" % (partial, target)
if s >= target:
return # if we reach the number why bother to continue
for i in range(len(numbers...