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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 |
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"use strict"; | |
// Load plugins | |
const autoprefixer = require("autoprefixer"); | |
const browsersync = require("browser-sync").create(); | |
const cp = require("child_process"); | |
const cssnano = require("cssnano"); | |
const del = require("del"); | |
const eslint = require("gulp-eslint"); | |
const gulp = require("gulp"); |
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// index.php | |
<?php | |
/** | |
* Solid | |
* S - принцип единственной обязанности (ответственности) | |
* Single responsibility principle | |
* Любой объект должен иметь лишь одну обязанность, и | |
* эта обязанность должна быть полностью реализована в классе объекта | |
*/ |
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// index.php | |
<?php | |
/** | |
* Solid | |
* O - принцип открытости / закрытости | |
* Open/closed principle | |
* Классы должны быть открыты для расширения и | |
* закрыты для изменений | |
*/ |
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// index.php | |
<?php | |
/** | |
* Solid | |
* L - принцип подстановки Барбары Лисков | |
* Liskov substitution principle, LSP | |
* Функции, которые используют базовый тип, должны | |
* иметь возможность использовать подтипы базового типа не зная об этом. | |
* | |
* Поведение наследуемых классов не должно противоречить |
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// ITransformer.php | |
<?php | |
/** | |
* Solid | |
* I - принцип разделения интерфейса | |
* Interface segregation principle, ISP | |
* Клиенты не должны зависеть от методов, которые они не используют | |
* | |
* Много специализированных интерфейсов лучше, чем один универсальный | |
*/ |
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// husband.php | |
<?php | |
/** | |
* Solid | |
* D - принцип инверсии зависимостей | |
* Dependency inversion principle, DIP | |
* Зависимости внутри системы строятся на основе абстракций, | |
* модули верхних уровней не должны зависеть от модулей | |
* нижних уровней. Оба типа модулей должны зависеть от абстракций. | |
* Абстракции не должны зависеть от деталей. Детали должны |
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String.prototype.trimMiddle=function() | |
// убирает все пробелы в начале и в конце строки | |
// помимо этого заменяет несколько подряд | |
// идущих пробелов внутри строки на один пробел | |
{ | |
var r=/\s\s+/g; | |
return this.trim().replace(r,' '); | |
} | |
String.prototype.trimAll=function() |