r-lyeh

A metatable can be defined like

local t = setmetatable({}, {
  __tostring = function() return 'custom tostring behavior!' end
})

Here are the metamethods that you can define, and their behavior

Operators

r-lyeh

// generic A* pathfinding

//
// INTERFACE
//

// mandatory macros

#ifndef ASTAR_POS_TYPE
#error ASTAR_POS_TYPE should specify position type

r-lyeh

import numpy as np

def sigmoid(x):
    return 1 / (1 + np.exp(-x))

def neural_network(X, y):
    learning_rate = 0.1
    W1 = np.random.rand(2, 4)
    W2 = np.random.rand(4, 1)

r-lyeh

# source : http://code.google.com/p/natvpn/source/browse/trunk/stun_server_list
# A list of available STUN server.

stun.l.google.com:19302
stun1.l.google.com:19302
stun2.l.google.com:19302
stun3.l.google.com:19302
stun4.l.google.com:19302
stun01.sipphone.com
stun.ekiga.net

r-lyeh

Here's a list of mildly interesting things about the C language that I learned over time.

1. Combined type and variable/field declaration, inside a struct scope: https://godbolt.org/g/Rh94Go
2. Compound literals are lvalues: https://godbolt.org/g/Zup5ZB
3. Switch cases anywhere: https://godbolt.org/g/fSeL18 (also see: Duff's Device)
4. Flexible array members: https://godbolt.org/g/HCjfzX
5. {0} as a universal initializer: https://godbolt.org/g/MPKkXv
6. Function typedefs: https://godbolt.org/g/5ctrLv
7. Array pointers: https://godbolt.org/g/N85dvv
8. Modifiers to array sizes in parameter definitions: https://godbolt.org/z/SKS38s

r-lyeh

Unicode table - List of most common Unicode characters *
* This summary list contains about 2000 characters for most common ocidental/latin languages and most printable symbols but not chinese, japanese, arab, archaic and some unprintable.
Contains character codes in HEX (hexadecimal), decimal number, name/description and corresponding printable symbol.
What is Unicode?

Unicode is a standard created to define letters of all languages ​​and characters such as punctuation and technical symbols. Today, UNICODE (UTF-8) is the most used character set encoding (used by almost 70% of websites, in 2013). The second most used character set is ISO-8859-1 (about 20% of websites), but this old encoding format is being replaced by Unicode.
How to identify the Unicode number for a character?

Type or paste a character: