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How to suppress “unused parameter” warnings in C?
...
I usually write a macro like this:
#define UNUSED(x) (void)(x)
You can use this macro for all your unused parameters. (Note that this works on any compiler.)
For example:
void f(int x) {
UNUSED(x);
...
}
...
How to convert a factor to integer\numeric without loss of information?
...nd may
happen by implicit coercion. To
transform a factor f to
approximately its original numeric
values, as.numeric(levels(f))[f] is
recommended and slightly more
efficient than
as.numeric(as.character(f)).
The FAQ on R has similar advice.
Why is as.numeric(levels(f))[f] more ef...
Rounded UIView using CALayers - only some corners - How?
...class:
@interface MyView : UIImageView
{
}
I'd never used graphics contexts before, but I managed to hobble together this code. It's missing the code for two of the corners. If you read the code, you can see how I implemented this (by deleting some of the CGContextAddArc calls, and deleting some ...
Define a lambda expression that raises an Exception
How can I write a lambda expression that's equivalent to:
6 Answers
6
...
How to update Python?
... in each of your conda environments to update all packages and the Python executable for that version. Also, since they changed their name to Anaconda, I don't know if the Windows registry keys are still the same.
UPDATE: 2017-03-24
There have been no updates to Python(x,y) since June of 2015, so ...
What is the optimal Jewish toenail cutting algorithm?
...es per foot*, so there are only 5! = 120 unrestricted sequences.
Python example:
#seq is only valid when consecutive elements in the list differ by at least two.
def isValid(seq):
for i in range(len(seq)-1):
a = seq[i]
b = seq[i+1]
if abs(a-b) == 1:
return ...
Are 2^n and n*2^n in the same time complexity?
Resources I've found on time complexity are unclear about when it is okay to ignore terms in a time complexity equation, specifically with non-polynomial examples.
...
What is a None value?
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Martijn's answer explains what None is in Python, and correctly states that the book is misleading. Since Python programmers as a rule would never say
Assigning a value of None to a variable is one way to reset it to
its original, empty...
Checking if a double (or float) is NaN in C++
...tation for your compiler, of course...
– dmckee --- ex-moderator kitten
Feb 20 '09 at 19:21
39
-1...
How to get first character of string?
...
What you want is charAt.
var x = 'some string';
alert(x.charAt(0)); // alerts 's'
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