In Javascript, runnable in Ihrem Browser:
vocabulary = ['start', 'tarts', 'stars', 'rats', 'tears'] // ...etc. read from a file
function letters(word) {
return word.split('');
}
function possibleWords(length, allowedLetters) {
var isAllowedLetter = function(letter) {
return allowedLetters.indexOf(letter) != -1; // allowedLetters contains letter
};
return vocabulary.filter(function(word) {
return word.length==length && letters(word).every(isAllowedLetter);
})
}
Demo:
> possibleWords(5, ['s','t','a','r'])
["start", "tarts", "stars"]
zu machen diese effizienter zu gestalten, würden Sie tun:
vocabulary = ['start', 'tarts', 'stars', 'rats', 'tears'] // ...etc. read from a file
function letters(word) {
return word.split('');
}
function set(iterable) {
var data = {};
iterable.forEach(function(x) {
data[x] = true;
});
return {
contains: function(x) {
return !(data[x]===undefined);
}
};
}
function possibleWords(length, allowedLetters) {
var isAllowedLetter = allowedLetters.contains;
return vocabulary.filter(function(word) {
return word.length==length && letters(word).every(isAllowedLetter);
})
}
Demo:
> possibleWords(5, set(['s','t','a','r']))
["start", "tarts", "stars"]
JavaScript dies tun können, ist es eine vollwertige Programmiersprache. –