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What is a good Hash Function?
...doing "normal" hash table lookups on basically any kind of data - this one by Paul Hsieh is the best I've ever used.
http://www.azillionmonkeys.com/qed/hash.html
If you care about cryptographically secure or anything else more advanced, then YMMV. If you just want a kick ass general purpose hash ...
C# 'is' operator performance
...erences in the 'is' operations. Why don't you remove those new operations, by reusing two different pre-allocated instances, and then re-run the code and post your results.
– user196088
Oct 25 '09 at 4:59
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Real differences between “java -server” and “java -client”?
... upgrade for both the Classic VM and the just-in-time (JIT) compilers used by previous versions of the JDK. The Client VM offers improved run time performance for applications and applets. The Java HotSpot Client VM has been specially tuned to reduce application start-up time and memory footprint, m...
How do I get a human-readable file size in bytes abbreviation using .NET?
How do I get a human-readable file size in bytes abbreviation using .NET?
19 Answers
1...
The role of #ifdef and #ifndef
...Text inside an ifdef/endif or ifndef/endif pair will be left in or removed by the pre-processor depending on the condition. ifdef means "if the following is defined" while ifndef means "if the following is not defined".
So:
#define one 0
#ifdef one
printf("one is defined ");
#endif
#ifndef one...
Where should Rails 3 custom validators be stored?
...ld go in a /lib or /lib/validators directory of a project. I've found (by reading an answer to another post) that they only seem to work in config/initializers . Does anyone know, or have a pointer to official documentation that shows where custom validators should live?
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Maximum length of the textual representation of an IPv6 address?
I want to store the data returned by $_SERVER["REMOTE_ADDR"] in PHP into a DB field, pretty simple task, really. The problem is that I can't find any proper information about the maximum length of the textual representation of an IPv6 address, which is what a webserver provides through $_SERVER...
Remove a git commit which has not been pushed
... yet.
So when I do git status , I get '# Your branch is ahead of 'master' by 1 commit.
11 Answers
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How to get the previous URL in JavaScript?
...the URL of the last page the user visited, if they got to the current page by clicking a link (versus typing directly into the address bar, or I believe in some cases, by submitting a form?). Specified by DOM Level 2. More here.
window.history allows navigation, but not access to URLs in the sessio...
Show a number to two decimal places
...imal places. For the OP's purpose - showing an integer to 2 decimal places by padding it with trailing zeroes - you need a number formatting function, not a rounding function.
– Mark Amery
Mar 16 '14 at 21:38
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