Sha256: c706366780721edc006be4da04b113cf71f9d98905be64fb956d7d354186743f
Contents?: true
Size: 1.26 KB
Versions: 211
Compression:
Stored size: 1.26 KB
Contents
export default class Square {
constructor (input) {
this.input = input;
}
normalizePlaintext () {
return this.input.toLowerCase().replace(/[^a-zA-Z0-9]/g,'');
}
size () {
const realLength = Math.sqrt(this.normalizePlaintext().length);
return Math.ceil(realLength);
}
plaintextSegments () {
const plainText = this.normalizePlaintext();
const chunkSize = this.size();
const splitRegex = new RegExp('.{1,' + chunkSize + '}','g');
return plainText.match(splitRegex);
}
ciphertext () {
const textSegments = this.plaintextSegments(),
columns = [];
let i, j,
currentSegment,
currentLetter;
for (i = 0; i < this.size(); i++) {
columns.push([]);
}
for (i = 0; i < textSegments.length; i++) {
currentSegment = textSegments[i];
for (j = 0; j < currentSegment.length; j++) {
currentLetter = currentSegment[j];
columns[j].push(currentLetter);
}
}
for (i = 0; i < columns.length; i++) {
columns[i] = columns[i].join('');
}
return columns.join('');
}
normalizeCiphertext () {
const chunkSize = this.size();
const splitRegex = new RegExp('.{1,' + chunkSize + '}','g');
return this.ciphertext().match(splitRegex).join(' ');
}
}
Version data entries
211 entries across 211 versions & 1 rubygems