euler
Version:
a commandline tool for greasing up your rusty programming and math skills through Project Euler challenges.
65 lines (49 loc) • 1.22 kB
JavaScript
;
var fs = require('fs');
var filter = function(suffix, number, element) {
suffix = suffix || '(js|coffee)';
number = number || '\\d\\d\\d'; // same as '\\d{3}' ?
return (new RegExp('euler_' + number + '.' + suffix + '\\b')).test(element);
};
var getList = function(filter) {
var list;
list = fs.readdirSync('.');
list = list.filter(filter);
list.sort(function(a, b) {
return a.localeCompare(b);
});
return list;
};
var find = {};
find.all = function(suffix, number) {
var list, selector;
selector = filter.bind(null, suffix, number);
return getList(selector);
};
find.ifExists = function(success, failure, suffix, number) {
var exists;
exists = fs.existsSync('euler_' + number + '.' + suffix);
if(exists) {
success();
} else {
failure();
}
return exists;
};
find.highest = function(success, failure, suffix) {
var list, number;
list = this.all(suffix);
if (list) {
if (list.length) {
number = list[list.length-1].slice(6, 9);
suffix = list[list.length-1].split('.')[1];
} else {
number = '000';
suffix = 'js';
}
success && success(number);
} else {
failure();
}
};
module.exports = find;