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How do I use valgrind to find memory leaks?
...locks are definitely lost in loss record 1 of 1
at 0x4C29BE3: malloc (vg_replace_malloc.c:299)
by 0x40053E: main (in /home/Peri461/Documents/executable)
Let's take a look at the C code I wrote too:
#include <stdlib.h>
int main() {
char* string = malloc(5 * sizeof(char)); //LEAK: ...
Perform debounce in React.js
...as it's not really relevant, but this answer will work perfectly fine with _.debounce of underscore or lodash, as well as any user-provided debouncing function.
GOOD IDEA:
Because debounced functions are stateful, we have to create one debounced function per component instance.
ES6 (class prope...
Select distinct values from a table field
...odel is 'Shop'
class Shop(models.Model):
street = models.CharField(max_length=150)
city = models.CharField(max_length=150)
# some of your models may have explicit ordering
class Meta:
ordering = ('city')
Since you may have the Meta class ordering attribute set, you can us...
What is the difference between typeof and instanceof and when should one be used vs. the other?
...ot work as expected and typeof works well ... developer.mozilla.org/En/Core_JavaScript_1.5_Reference/…
– farinspace
May 22 '09 at 19:37
55
...
How can I get the list of files in a directory using C or C++?
... */
while ((ent = readdir (dir)) != NULL) {
printf ("%s\n", ent->d_name);
}
closedir (dir);
} else {
/* could not open directory */
perror ("");
return EXIT_FAILURE;
}
It is just a small header file and does most of the simple stuff you need without using a big template-based ap...
Java ByteBuffer to String
...sibling getBytes() method:
byte[] bytes = k.getBytes( StandardCharsets.UTF_8 );
To put bytes with a particular encoding into a String, you can use a different String constructor:
String v = new String( bytes, StandardCharsets.UTF_8 );
Note that ByteBuffer.array() is an optional operation. If y...
Can dplyr package be used for conditional mutating?
... ifelse(a == 0 | a == 1 | a == 4 | a == 3 | c == 4, 3, NA)))
Added - if_else: Note that in dplyr 0.5 there is an if_else function defined so an alternative would be to replace ifelse with if_else; however, note that since if_else is stricter than ifelse (both legs of the condition must have the ...
Get local IP address
... edited Oct 17 '17 at 19:32
ivan_pozdeev
26.5k1010 gold badges7676 silver badges124124 bronze badges
answered Jul 23 '11 at 20:26
...
Get nth character of a string in Swift programming language
...vailable also to the substrings:
extension StringProtocol {
subscript(_ offset: Int) -> Element { self[index(startIndex, offsetBy: offset)] }
subscript(_ range: Range<Int>) -> SubSequence { prefix(range.lowerBound+range.count).suffix(range.c...
Readonly Properties in Objective-C?
...
In the implementation .m file:
// inside one of my init methods
self->_foo = @"someString"; // Notice the underscore prefix of var name.
That’s it, that’s all you need. No muss, no fuss.
Details
As of Xcode 4.4 and LLVM Compiler 4.0 (New Features in Xcode 4.4), you need not mess with th...