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Why do we need boxing and unboxing in C#?
...pes to have a completely different representation of their underlying data from the way that reference types represent their underlying data (e.g., an int is just a bucket of thirty-two bits which is completely different than a reference type).
Think of it like this. You have a variable o of type o...
What is the difference between a generative and a discriminative algorithm?
...rposes. For example, you could use p(x,y) to generate likely (x,y) pairs.
From the description above, you might be thinking that generative models are more generally useful and therefore better, but it's not as simple as that. This paper is a very popular reference on the subject of discriminative ...
Hashset vs Treeset
...gineer I've ever known has asked me pointedly why I would use a TreeSet . From a CS background, I don't think it matters all that much which you use, and I don't care to mess around with hash functions and buckets (in the case of Java ).
...
How to extract custom header value in Web API message handler?
...cally supplies a default guid as a string (as it would have been retrieved from Header) and the Guid.Parse third parameter will translate the found or default string value into a GUID.
– Mikee
Feb 6 '15 at 14:23
...
How is an HTTP POST request made in node.js?
...require('fs');
function PostCode(codestring) {
// Build the post string from an object
var post_data = querystring.stringify({
'compilation_level' : 'ADVANCED_OPTIMIZATIONS',
'output_format': 'json',
'output_info': 'compiled_code',
'warning_level' : 'QUIET',
'j...
Are Java static calls more or less expensive than non-static calls?
... to say "premature opimisation is the root of all evil" I'd get 1000 votes from people who know as much about performance as the parrot.
– rghome
Jan 28 '19 at 14:54
...
Java - removing first character of a string
...
Use the substring() function with an argument of 1 to get the substring from position 1 (after the first character) to the end of the string (leaving the second argument out defaults to the full length of the string).
"Jamaica".substring(1);
...
Database sharding vs partitioning
...ted out partitioned on very few servers, using Postgres to divide the data from the get-go. I believe it was several thousand logical shards on those few physical shards. Read their awesome writeup from 2012 here: Instagram Engineering - Sharding & IDs
See here as well: http://www.quora.com/Wha...
PhoneGap: Detect if running on desktop browser
...do the job for 98% of the cases.
/**
* Determine whether the file loaded from PhoneGap or not
*/
function isPhoneGap() {
return (window.cordova || window.PhoneGap || window.phonegap)
&& /^file:\/{3}[^\/]/i.test(window.location.href)
&& /ios|iphone|ipod|ipad|android/i...
How can I tell Rails to use RSpec instead of test-unit when creating a new Rails app?
...
Can you edit the code from g.test_framework = :rspec to g.test_framework :rspec
– Deepak Lamichhane
Jul 2 '13 at 10:23
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