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Включение кеша браузера | |
Вариант 1 | |
<ifModule mod_headers.c> | |
<FilesMatch "\.(js|css|txt)$"> | |
Header set Cache-Control "max-age=604800" | |
</FilesMatch> | |
<FilesMatch "\.(flv|swf|ico|gif|jpg|jpeg|png)$"> | |
Header set Cache-Control "max-age=2592000" |
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//return an array of objects according to key, value, or key and value matching | |
function getObjects(obj, key, val) { | |
var objects = []; | |
for (var i in obj) { | |
if (!obj.hasOwnProperty(i)) continue; | |
if (typeof obj[i] == 'object') { | |
objects = objects.concat(getObjects(obj[i], key, val)); | |
} else | |
//if key matches and value matches or if key matches and value is not passed (eliminating the case where key matches but passed value does not) | |
if (i == key && obj[i] == val || i == key && val == '') { // |
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; Аппликативный и нормальный порядки вычисления | |
; | |
; «полная подстановка, затем редукция» известен под на- | |
; званием нормальный порядок вычислений (normal-order evaluation) | |
; | |
; Пример работы нормального порядка вычисления | |
; Последовательность подстановок | |
; (sum-of-squares (+ 5 1) (* 5 2)) | |
; (+ (square (+ 5 1)) (square (* 5 2))) | |
; (+ (* (+ 5 1) (+ 5 1)) (* (* 5 2) (* 5 2))) |