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Generating all permutations of a given string
...(n == 0) System.out.println(prefix);
else {
for (int i = 0; i < n; i++)
permutation(prefix + str.charAt(i), str.substring(0, i) + str.substring(i+1, n));
}
}
(via Introduction to Programming in Java)
...
Accessing an array out of bounds gives no error, why?
...the plain old C-compatible one. It is not a class. Further, C++ is also built on another rule which makes bounds-checking non-ideal. The C++ guiding principle is "you don't pay for what you don't use". If your code is correct, you don't need bounds-checking, and you shouldn't be forced to pay for th...
Detecting request type in PHP (GET, POST, PUT or DELETE)
...ith Apache and Lighttpd out of the box, and no rewrite rules are needed.
<?php
$method = $_SERVER['REQUEST_METHOD'];
$request = explode("/", substr(@$_SERVER['PATH_INFO'], 1));
switch ($method) {
case 'PUT':
do_something_with_put($request);
break;
case 'POST':
do_something_wit...
Twitter Bootstrap Tabs: Go to Specific Tab on Page Reload or Hyperlink
...
I'd add 1 more extra line window.scrollTo(0, 0); to make sure the Window always scroll to the top
– Trung Lê
Apr 23 '12 at 21:27
1
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Using regular expression in css?
...Is it possible to do "destruct" with each match?
– Walter
Jun 1 at 1:29
add a comment
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How to get the list of properties of a class?
...rom my library - this gets the names and values)
public static Dictionary<string, object> DictionaryFromType(object atype)
{
if (atype == null) return new Dictionary<string, object>();
Type t = atype.GetType();
PropertyInfo[] props = t.GetProperties();
Dictionary<stri...
Regular expression to match numbers with or without commas and decimals in text
...ex regex can get if you try to be clever with it, and why you should seek alternatives. Read at your own risk.
This is a very common task, but all the answers I see here so far will accept inputs that don't match your number format, such as ,111, 9,9,9, or even .,,.. That's simple enough to fix, ev...
Unstage a deleted file in git
...
Assuming you're wanting to undo the effects of git rm <file> or rm <file> followed by git add -A or something similar:
# this restores the file status in the index
git reset -- <file>
# then check out a copy from the index
git checkout -- <file>
To undo...
Google Maps Android API v2 Authorization failure
...he Signature Algorithm MUST be SHA1withRSA and NOT SHA256withRSA (the default created by eclipse for the debug key).
– Yoel Gluschnaider
Dec 20 '12 at 9:30
1
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How does having a dynamic variable affect performance?
...s starts over again; we do semantic analysis of the call and store the result in the cache.
This happens for every expression that involves dynamic. So for example if you have:
int x = d1.Foo() + d2;
then there are three dynamic calls sites. One for the dynamic call to Foo, one for the dynamic a...