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How would one write object-oriented code in C? [closed]
...http) {
http->open = &httpOpen;
return 0;
}
And finally a test program to show it in action:
// Test program.
int main (void) {
int status;
tCommClass commTcp, commHttp;
// Same 'base' class but initialised to different sub-classes.
tcpInit (&commTcp);
ht...
Iterate over a list of files with spaces
...to perform multiple steps the loop version is easier.
EDIT: Here's a nice test script so you can get an idea of the difference between different attempts at solving this problem
#!/usr/bin/env bash
dir=/tmp/getlist.test/
mkdir -p "$dir"
cd "$dir"
touch 'file not starting foo' foo foobar ba...
Objective-C: Property / instance variable in category
...gt;
static void *MyClassResultKey;
@implementation MyClass
- (NSString *)test {
NSString *result = objc_getAssociatedObject(self, &MyClassResultKey);
if (result == nil) {
// do a lot of stuff
result = ...;
objc_setAssociatedObject(self, &MyClassResultKey, result, OBJC_ASSOC...
How to link C++ program with Boost using CMake
...2 xy xy 4.0K May 28 19:23 ./
-rw-rw-r-- 1 xy xy 2.3M May 28 19:23 libboost_test_exec_monitor.a
-rw-rw-r-- 1 xy xy 2.2M May 28 19:23 libboost_unit_test_framework.a
.......
xy@xy:~/boost_install/lib$ ll -th include/
total 20K
drwxrwxr-x 110 xy xy 12K May 28 19:22 boost/
If you are interested in ho...
Python function overloading
...collections import namedtuple
>>> from types import * # we can test for lambda type, e.g.:
>>> type(lambda a: 1) == LambdaType
True
>>> Sprite = namedtuple('Sprite', ['name'])
>>> Point = namedtuple('Point', ['x', 'y'])
>>> Curve = namedtuple('Curve',...
Python: Why is functools.partial necessary?
...
In the latest versions of Python (>=2.7), you can pickle a partial, but not a lambda:
>>> pickle.dumps(partial(int))
'cfunctools\npartial\np0\n(c__builtin__\nint\np1\ntp2\nRp3\n(g1\n(tNNtp4\nb.'
>>> pickle.dumps(...
Convert string to integer type in Go?
...
Here are three ways to parse strings into integers, from fastest runtime to slowest:
strconv.ParseInt(...) fastest
strconv.Atoi(...) still very fast
fmt.Sscanf(...) not terribly fast but most flexible
Here's a benchmark that shows usage and example timing for each function:
packa...
How to get started on TDD with Ruby on Rails? [closed]
I am familiar with the concepts (took testing classes in college), but I am not sure how to really use them yet since I never worked on a "real" TDD project.
...
Can I set an opacity only to the background image of a div?
...
top: 0;
bottom: 0;
left: 0;
right: 0;
background: url(test.jpg) center center;
opacity: .4;
width: 100%;
height: 100%;
}
See test case on jsFiddle
:before and ::before pseudo-element
Another trick is to use the CSS 2.1 :before or CSS 3 ::before pseudo-elements. :...
Advantage of switch over if-else statement
...different area of the code, but now you have the opportunity to reuse this test. You also have more options for how to solve it. You could use std::set, for example:
bool RequiresSpecialEvent(int numError)
{
return specialSet.find(numError) != specialSet.end();
}
I'm not suggesting that thi...