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Generating random numbers in Objective-C
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You should use the arc4random_uniform() function. It uses a superior algorithm to rand. You don't even need to set a seed.
#include <stdlib.h>
// ...
// ...
int r = arc4random_uniform(74);
The arc4random man page:
NAME
arc4random, arc4random...
Prototypical inheritance - writing up [duplicate]
... function it uses this. The value of this will be the invoking object; for now let's say it's the current instance so for bob.walk() "this" will be bob. (more on "this" and the invoking object later).
If ben was waiting for a red light and and bob was at a green light; then you'll invoke walk() on ...
What's the algorithm to calculate aspect ratio?
...integer solution like 16:9 rather than a float:1 solution like 1.77778:1.
If so, what you need to do is find the greatest common divisor (GCD) and divide both values by that. The GCD is the highest number that evenly divides both numbers. So the GCD for 6 and 10 is 2, the GCD for 44 and 99 is 11.
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How do I check if an element is really visible with JavaScript? [duplicate]
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I don't know how much of this is supported in older or not-so-modern browsers, but I'm using something like this (without the neeed for any libraries):
function visible(element) {
if (element.offsetWidth === 0 || element.offsetHeig...
C# Float expression: strange behavior when casting the result float to int
...igher precision than the formal type (section 11.2.2). That's why you see different behavior on different systems: In the expression (int)(6.2f * 10), the compiler has the option of keeping the value 6.2f * 10 in a high precision intermediate form before converting to int. If it does, then the resul...
Stop all active ajax requests in jQuery
...uld use an array keeping track of all pending ajax requests and abort them if necessary.
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Counting the Number of keywords in a dictionary in python
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len(yourdict.keys())
or just
len(yourdict)
If you like to count unique words in the file, you could just use set and do like
len(set(open(yourdictfile).read().split()))
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Unit test naming best practices [closed]
...of the issues with the Should pattern I describe above as its not easy to know at a glance which method is under test. For OOP I think it makes more sense to start the test name with the method under test. For a well designed class this should result in readable test method names. I now use a format...
Can I implement an autonomous `self` member type in C++?
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class WITH_SELF(Foo)
{
void test()
{
self foo;
}
};
If you want to derive from Foo then you should use the macro WITH_SELF_DERIVED in the following way:
class WITH_SELF_DERIVED(Bar,Foo)
{
/* ... */
};
You can even do multiple inheritance with as many base classes as you...
How to select label for=“XYZ” in CSS?
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And now the jQuery docs say you don't need the quotes for single words, so it matches CSS again (in this regard).
– T.J. Crowder
Jun 25 '12 at 17:39
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