Transliterate

This is a rewrite of the perl tr method.

To use

const tr = require('perl-transliterate');
tr(str, searchStr, replaceStr [, flags])

Without flags:

const tr = require('perl-transliterate');

let str = 'abba';

str = tr(str, 'ab', 'po');

console.log(str === 'poop');

Here we're taking a string we want to search through (abba) and searching for instances of ab to be replaced with po: all instances of a will be replaced with p and all instances of b will be replaced by o.

With Flags:

s

const tr = require('perl-transliterate');

let str = 'abba';
str = tr(str, 'ab', 'po', 's');

console.log(str === 'pop');

The s flag will squash characters that appear sequentially in a row, so becase b is being replaced with o and the s flag is set, it will remove an instance of b and replace with a single instance of o creating: pop. Whilst a appears twice, they are not sequntial, and thus will each will be replaced with p.

d

const tr = require('perl-transliterate');

let str = 'adam';
str = tr(str, 'adm', 'ev', 'd');

console.log(str === 'eve');

The d flag will remove characters that appear in the search string but do not have a replacement string value. In the above example, m is in the search string, but does not have a replacement string value, meaning that any m found in the string will be removed.

ds

const tr = require('perl-transliterate');

let str = 'abba';
str = tr(str, 'ab', 'p', 'ds');

console.log(str === 'p');

d and s can be combined.