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What is a Windows Handle?
...r * val;
LargeObj()
{
val = malloc(2048 * 1000);
}
}
void foo(Object bar){
LargeObj lo = new LargeObj();
bar.Value++;
}
void main()
{
Object obj = new Object();
obj.val = 1;
foo(obj);
printf("%d", obj.val);
}
So because obj was passed by value (make a copy and...
Callback after all asynchronous forEach callbacks are completed
...veral ways to accomplish what you want:
Using a simple counter
function callback () { console.log('all done'); }
var itemsProcessed = 0;
[1, 2, 3].forEach((item, index, array) => {
asyncFunction(item, () => {
itemsProcessed++;
if(itemsProcessed === array.length) {
callback(...
How to extract URL parameters from a URL with Ruby or Rails?
...te the inverse, at least not in Ruby 1.8.7 / Rails 2.3. A query string of foo[]=1&foo[]=2 is correctly parsed as { "foo" =>["1","2"] }, but build_query turns that into "foo=1&foo=2", which when parsed again yields { "foo"=>"2"}.
– Raels
Jul 20 '1...
How to run a command before a Bash script exits?
...e of using trap:
#!/bin/bash -e
function cleanup {
echo "Removing /tmp/foo"
rm -r /tmp/foo
}
trap cleanup EXIT
mkdir /tmp/foo
asdffdsa #Fails
Output:
dbrown@luxury:~ $ sh traptest
t: line 9: asdffdsa: command not found
Removing /tmp/foo
dbrown@luxury:~ $
Notice that even though the asdf...
Why isn't the size of an array parameter the same as within main?
...with %zu (C99), or cast it to int if you use %d like above in your printf calls.
– Alok Singhal
Dec 29 '09 at 15:41
4
...
What does the “static” modifier after “import” mean?
...on. Where the normal import
declaration imports classes from
packages, allowing them to be used
without package qualification, the
static import declaration imports
static members from classes, allowing
them to be used without class
qualification.
So when should you use static imp...
Why do we declare Loggers static final?
...ic final Logger log = LoggerFactory.getLogger(Foo.class);
The former way allows you to use the same logger name (name of the actual class) in all classes throughout the inheritance hierarchy. So if Bar extends Foo, both will log to Bar logger. Some find it more intuitive.
...
How to check if mysql database exists
...
Why is "INFORMATION_SCHEMA" in all caps? With me it's in all lower case
– Hubro
Jun 15 '12 at 13:19
3
...
Get string character by index - Java
...???????????";
Iterate of chars
The first solution is a simple loop over all char of the string:
/* 1 */
System.out.println(
"\n\nUsing char iterator (do not work for surrogate pairs !)");
for (int pos = 0; pos < str.length(); ++pos) {
char c = str.charAt(pos);
System.out.print...
Getting output of system() calls in Ruby
If I call a command using Kernel#system in Ruby, how do I get its output?
15 Answers
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