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How can I know which parts in the code are never used?
...t the time it is performed that it is near impossible to convey meaningful information to the user.
There are therefore two approaches:
The theoretic one is to use a static analyzer. A piece of software that will examine the whole code at once in great detail and find all the flow paths. In pract...
Determine if a function exists in bash
...obvious answer.
Edit: Below, the -f option is superfluous with BASH, feel free to leave it out. Personally, I have trouble remembering which option does which, so I just use both. -f shows functions, and -F shows function names.
#!/bin/sh
function_exists() {
declare -f -F $1 > /dev/null
...
Create a GUID in Java
...ators for random-based and name-based UUIDs, compliant with RFC-4122. Feel free to use and share.
RANDOM-BASED (v4)
This utility class that generates random-based UUIDs:
package your.package.name;
import java.security.SecureRandom;
import java.util.Random;
import java.util.UUID;
/**
* Utility cla...
Why Java needs Serializable interface?
...things serializable" agenda in mind. Its an example of some one wanting to free whell and not heed the security and design lessons that have already been learned in the past.
– gbtimmon
Jul 9 '12 at 17:30
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How to atomically delete keys matching a pattern using Redis
...m.
EDIT: Per Kikito's comment below, if you have more keys to delete than free memory in your Redis server, you'll run into the "too many elements to unpack" error. In that case, do:
for _,k in ipairs(redis.call('keys', ARGV[1])) do
redis.call('del', k)
end
As Kikito suggested.
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How does OpenID authentication work?
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What is OpenID?
OpenID is an open, decentralized, free framework for user-centric digital identity. OpenID takes advantage of already existing internet technology (URI, HTTP, SSL, Diffie-Hellman) and realizes that people are already creating identities for themselves whether...
How can jQuery deferred be used?
...presented the results at jQuery Conference San Francisco 2012.
Here is a free video of the talk:
https://www.youtube.com/watch?v=juRtEEsHI9E
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Long-held, incorrect programming assumptions [closed]
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That bugfree software was possible.
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edited Aug 11 '10 at 10:41
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Incompatible implicit declaration of built-in function ‘malloc’
...ins the header information or prototype of the malloc, calloc, realloc and free functions.
So to avoid this warning in ANSI C, you should include the stdlib header file.
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Export specific rows from a PostgreSQL table as INSERT SQL script
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Just want to share to other people, you can also use this free GUI tool: SQL Workbench/J (with postgreSQL jdbc4 driver), to do the same thing.
– null
Oct 11 '12 at 9:27
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