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Is a GUID unique 100% of the time?
...8 written out is approximately: 34,028,236,692,093,846,346,337,460,743,177,000,000. Statistically, if you calculated 1000 GUIDs every second, it would still take trillions of years to get a duplicate.
– Entity
Jul 24 '12 at 4:01
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Combining a class selector and an attribute selector with jQuery
... to remove the space. i.e.
$(".myclass[reference=12345]").css('border', '#000 solid 1px');
There is a fiddle here http://jsfiddle.net/xXEHY/
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List of Big-O for PHP functions
...r example the difference between a call to array_key_exists at N=1 and N=1,000,000 is ~50% time increase.
Interesting Points:
isset/array_key_exists is much faster than in_array and array_search
+(union) is a bit faster than array_merge (and looks nicer). But it does work differently so keep that...
Are 2^n and n*2^n in the same time complexity?
...complexity grows is exponential.
So, we consider to be 2ⁿ, 3ⁿ, eⁿ, 2.000001ⁿ, or our n⋅2ⁿ to be same group of complexity with exponential grows.
To give it a bit mathematical sense, we consider a function f(x) to grow (not faster than) exponentially if exists such constant c > 1, tha...
Random String Generator Returning Same String [duplicate]
...dstad Agreed, I did a loop and it hits a collision after approximately 130,000 iterations. Even though there are 1,785,793,904,896 combinations.
– Andrew
Jan 24 '12 at 12:54
18
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in_array() and multidimensional array
...ran the code but it has an error - Parse error: parse error in C:\wamp\www\000_TEST\php\php.in_array\index.php on line 21 - which is if(in_array("Irix", $value) thanks.
– laukok
Nov 8 '10 at 21:51
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How to filter specific apps for ACTION_SEND intent (and set a different text for each app)
...b installs (thousands)
"com.twitter.android", // official - 10 000
"com.twidroid", // twidroid - 5 000
"com.handmark.tweetcaster", // Tweecaster - 5 000
"com.thedeck.android" }; // TweetDeck - 5 000 };
Intent tweetIntent = new Intent();
tweetIn...
Try catch statements in C
...ined, so things get a little out of hand.
– flamewave000
Mar 11 at 20:06
Yes, it is limited to one try-catch in the sa...
How to generate a random string in Ruby
...ost upvotes:
require 'benchmark'
require 'securerandom'
len = 10
n = 100_000
Benchmark.bm(12) do |x|
x.report('SecureRandom') { n.times { SecureRandom.alphanumeric(len) } }
x.report('rand') do
o = [('a'..'z'), ('A'..'Z'), (0..9)].map(&:to_a).flatten
n.times { (0...len).map { o[ran...
Event binding on dynamically created elements?
...ower overhead when many elements must be monitored. On a data table with 1,000 rows in its tbody, the first code example attaches a handler to 1,000 elements.
A delegated-events approach (the second code example) attaches an event handler to only one element, the tbody, and the event only needs to ...