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word_scrambler.js
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word_scrambler.js
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function scramble(word){
var letters = word.split("")
var output = []
while(letters.length>0){
var j = Math.floor(Math.random()*letters.length)
output.push(letters[j])
letters.splice(j,1)
}
return output.join("")
}
function multiscramble(word,n){
var max_permutations = unique_perms(word)
var iters = n
if(n>max_permutations){
iters = max_permutations
}
var output = []
for(var i=0;i<iters;i++){
var temp = scramble(word)
if(output.indexOf(temp)>-1){
i--
} else {
output.push(temp)
}
}
return output
}
function factorial(n){
var result
if(n==0){
result = 1
} else{
result = n*factorial(n-1)
}
return result
}
function unique_perms(string){
var letters = string.split("")
var frequencies = {}
for(var i=0;i<letters.length;i++){
if(frequencies[letters[i]]){
frequencies[letters[i]] += 1
} else {
frequencies[letters[i]] = 1
}
}
var perms = factorial(letters.length)
for(var key in frequencies){
perms = perms/factorial(frequencies[key])
}
return perms
}