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How do you reverse a string in place in JavaScript?
...r, there are some problems with this solution. For example:
naiveReverse('foo ???? bar');
// → 'rab �� oof'
// Where did the `????` symbol go? Whoops!
If you’re wondering why this happens, read up on JavaScript’s internal character encoding. (TL;DR: ???? is an astral symbol, and JavaScr...
Creating C formatted strings (not printing them)
...h>
#include <stdio.h>
// a function that accepts a string:
void foo( char* s);
// You'd like to call a function that takes a format string
// and then calls foo():
void foofmt( char* fmt, ...)
{
char buf[100]; // this should really be sized appropriately
...
PHP json_encode encoding numbers as strings
...$arr["var"], "float") to fix it.
<?php
class testclass {
public $foo = 1;
public $bar = 2;
public $baz = "Hello, world";
}
$testarr = array( 'foo' => 1, 'bar' => 2, 'baz' => 'Hello, world');
$json_obj_txt = json_encode(new testclass());
$json_arr_txt = json_encode($testa...
Rails “validates_uniqueness_of” Case Sensitivity
...important):
Process A gets a request to create a new user with the name 'foo'
Process B does the same thing
Process A validates the uniqueness of 'foo' by asking the DB if that name exists yet and the DB says the name doesn't exist yet.
Process B does the same thing and gets the same response
Proc...
What is HEAD in Git?
...So if you did a git log and got something like commit ad0265... HEAD -> foo ... that would mean the foo branch is a reference to commit id ad0265. Doing a checkout of the text reference foo is not a detached head. Doing a checkout of the commit id ad0265 would result in a detached head. May be...
CodeIgniter - accessing $config variable in view
...->item() works fine.
For example, if the config file contains $config['foo'] = 'bar'; then $this->config->item('foo') == 'bar'
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Testing Abstract Classes
...nd as an arbitrary answer: You have an abstract class 'A' having a common 'foo()' method. This 'foo()' method is being used overall all 'B', and 'C' classes, both derive from 'A'. Which class would you choose to test 'foo()'?
– user3790897
Aug 21 '17 at 14:28
...
Using NSPredicate to filter an NSArray based on NSDictionary keys
...ata = [NSArray arrayWithObject:[NSMutableDictionary dictionaryWithObject:@"foo" forKey:@"BAR"]];
NSArray *filtered = [data filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(BAR == %@)", @"foo"]];
Filtered in this case contains the dictionary.
(the %@ does not have to be quoted,...
What are copy elision and return value optimization?
... Thing {
public:
Thing();
~Thing();
Thing(const Thing&);
};
void foo(Thing t);
foo(Thing());
or when an exception is thrown and caught by value:
struct Thing{
Thing();
Thing(const Thing&);
};
void foo() {
Thing c;
throw c;
}
int main() {
try {
foo();
}
catch(Thi...
How can I recover the return value of a function passed to multiprocessing.Process?
...to get a value from a Process using Queue:
import multiprocessing
ret = {'foo': False}
def worker(queue):
ret = queue.get()
ret['foo'] = True
queue.put(ret)
if __name__ == '__main__':
queue = multiprocessing.Queue()
queue.put(ret)
p = multiprocessing.Process(target=worker,...