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/* Dump all 'user space' globals | |
Many thanks to glutamat: http://stackoverflow.com/questions/14585537 */ | |
void( (function() | |
{ | |
var w = document.body.appendChild( document.createElement("iframe") ).contentWindow, | |
known = | |
[ | |
"screenLeft" , "screenTop" , "scrollX" , "scrollY" , "pageYOffset" , "pageXOffset" , /* Scrolling related built-ins */ | |
"innerWidth" , "innerHeight" , "outerWidth" , "outerHeight" , /* Size related built-ins */ | |
"defaultstatus" , "defaultStatus", /* Status bar text related built-ins */ |
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function isPrime( n ) | |
{ | |
if( n < 2 ) | |
return false | |
if( n < 4 ) | |
return true; | |
if( n % 2 == 0 ) | |
return false; | |
if( n % 3 == 0 ) | |
return false; |
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// Excerpt from: https://github.com/Animatron/player/blob/master/anm.collisions.js | |
function edgeTest(p1, p2, p3, r2) { | |
var rot = [ -(p2[1] - p1[1]), | |
p2[0] - p1[0] ]; | |
var ref = (rot[0] * (p3[0] - p1[0]) + | |
rot[1] * (p3[1] - p1[1])) >= 0; | |
for (var i = 0, il = r2.length; i < il; i+=2) { |
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function formatNumber( n , precision ) | |
{ | |
n = n * 1; | |
return n.toLocaleString().split(".")[0] + "." + n.toFixed( precision || 2 ).split(".")[1]; | |
} |
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/* Permute will give all permutations for the provided array ( sourceSet ) | |
do not provide usedSet nor permutationSet | |
Based on http://stackoverflow.com/a/9960925/7602 | |
*/ | |
function permute( sourceSet , usedSet , permutationsSet ) { | |
permutationsSet = permutationsSet || []; | |
usedSet = usedSet || []; | |
for (var i = 0; i < sourceSet.length; i++) { | |
usedSet.push( sourceSet.splice(i, 1)[0] ); | |
if (!sourceSet.length) |
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function sortfunction(a, b) | |
{ | |
return (a - b) //causes an array to be sorted numerically and ascending | |
} | |
function canWeDoIt( target , a ) | |
{ | |
if( a.length == 1 ) | |
return (a[0] == target); | |
if( a[0] == target ) |
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta name="description" content="ISEE Math Challenge Generator" /> | |
<meta charset=utf-8 /> | |
<title></title> | |
</head> | |
<body> | |
</body> |
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function powerSet( list ){ | |
var set = [], | |
listSize = list.length, | |
combinationsCount = (1 << listSize); | |
for (var i = 1; i < combinationsCount ; i++ , set.push(combination) ) | |
for (var j=0, combination = [];j<listSize;j++) | |
if ((i & (1 << j))) | |
combination.push(list[j]); | |
return set; |
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function fillTemplate( s ) | |
{ //Replace ~ with further provided arguments | |
for( var i = 1, a = s.split('~'), s = '' ; i < arguments.length ; i++ ) | |
s = s + a.shift() + arguments[i]; | |
return s + a.join(""); | |
} |
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//Good | |
function lambdafy( f ) | |
{ | |
return function lambdafier() { | |
var args = Array.prototype.slice.call(arguments); | |
return function lambda(){ | |
f.apply( this , args ); | |
} | |
} | |
} |
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