Using newer compiler versions and the optimizer gives gas optimizations and additional safety checks for free!
The advantages of versions 0.8.* over <0.8.0 are:
0.8.0 (can be more gas efficient than some
library based safemath).0.8.2, leads to cheaper runtime gas.
Especially relevant when the contract has small functions. For
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| /* | |
| TITLE: CODE GRABBER FOR HT6P20B ENCODER | |
| CREATED BY: AFONSO CELSO TURCATO | |
| DATE: 14/JAN/2014 | |
| E-MAIL: acturcato (at) gmail.com | |
| LICENSE: GPL | |
| REV.: 00 | |
| DESCRIÇÃO: | |
| http://acturcato.wordpress.com/2014/01/14/clonagem-de-controle-remoto-rf-learning-code-ht6p20b-com-arduino/ |
| class Integer | |
| def factorial | |
| return 1 if self == 0 | |
| (1..self).inject(:*) | |
| end | |
| def nPr(r) | |
| numerator = self.factorial | |
| denominator = self.factorial(self - r) | |
| @permutations = (self-r+1 .. self).inject(:*) |