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@vitorbal
vitorbal / PropTypes best practices.md
Created January 19, 2017 10:51
Best practices for writing PropTypes for React Components (Work in Progress)

Best Practices for React PropTypes

  • Avoid using PropTypes.string for a prop that sets a type/variation, use PropTypes.oneOf(CONSTANT) instead:
// BAD:
Button.propTypes = {
    size: React.PropTypes.string
};

// Good:
package com.company;
public class Main {
public static void main(String[] args) {
// write your code here
// apelle de la methode
System.out.println(somme(1, 1));
}
@jrus
jrus / lua-uuid.lua
Created July 29, 2012 09:26
quick lua implementation of "random" UUID
local random = math.random
local function uuid()
local template ='xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'
return string.gsub(template, '[xy]', function (c)
local v = (c == 'x') and random(0, 0xf) or random(8, 0xb)
return string.format('%x', v)
end)
end
@jboner
jboner / latency.txt
Last active January 9, 2026 22:05
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD