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Regular expression to match URLs in Java
...tic final String concatGroups(Matcher matcher) {
StringBuilder b = new StringBuilder();
final int numGroups = matcher.groupCount();
for (int i = 1; i <= numGroups; i++) {
String s = matcher.group(i);
if (s != null) {
b.append(s);
...
PHP CURL DELETE request
.... If anyone else is having this problem, here is my solution:
I created a new method:
public function curl_del($path)
{
$url = $this->__url.$path;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "DELETE");
$result = curl_exec($...
Node.js Best Practice Exception Handling
...= 0 ) {
// "throw" the error safely by returning it
return new Error("Can't divide by zero")
}
else {
// no error occured, continue on
return x/y
}
}
// Divide 4/2
var result = divideSync(4,2)
// did an error occur?
if ( result instanceof Error ) {
//...
Why doesn't Dijkstra's algorithm work for negative weight edges?
.... Then we visit D's adjacent nodes, and the only adjacent node is C, whose new distance is -5. Note that in the Dijkstra's algorithm, we also keep track of the parent from which we reach (and update) the node, and doing it from C, you will get the parent B, and then A, resulting in a correct result....
Why do we use Base64?
... "\n>From " when it saves the message to a mailbox. Or HTTP headers are newline terminated with no reversible way to escape newlines in the data (line continuation conflates whitespace), so you can't just dump arbitrary ASCII into them either. base64 is better than just 7-bit safe, it's alpha-num...
Center image in table td in CSS
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Top SystemsTop Systems
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SQL, Postgres OIDs, What are they and why are they useful?
... the OIDs on row counters doesn't help the database with assigning OIDs to new tables (for the table, not its rows). Also, consider whether a singe 4-byte integer counter is really going to be sufficient for every table in your database.
– FuzzyChef
Jan 30 '15...
frequent issues arising in android view, Error parsing XML: unbound prefix
...
...and in the new Google Play AdMob it's :xmlns:ads="schemas.android.com/apk/res-auto"
– user1010160
Jun 12 '14 at 0:04
...
NSUserDefaults removeObjectForKey vs. setObject:nil
...unction () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f6033174%2fnsuserdefaults-removeobjectforkey-vs-setobjectnil%23new-answer', 'question_page');
}
);
...
Multiple controllers with AngularJS in single page app
...gs) if only your first controller works. (I remember this from my Angular newbie days.)
– ftexperts
Oct 28 '14 at 4:11
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