Strings Collections parsing

1. Usage Instructions

clone the repo and install Node.js modules

$ git clone https://github.com/elenamorton/parser_ldc_js.git
$ cd parser_ldc_js
$ npm install

run tests

$ npm test

start up the CLI Node application

$ npm start

Used Technologies

Vanilla JavaScript ES6
NodeJS v6.11.2
Npm v3.10.10
Test suite based on Mocha(v3.5.3), Chai(v4.1.2)

2. Requirements

Write a program with unit-tests to process a collection of string values which are passed to a method which returns a collection of processed strings. Code should be test-driven, efficient, re-usable and loosely coupled.

Headline specifications

The input strings may be any length and can contain any character;
Contiguous duplicate characters in the same case should be reduced to a single character in the same case;
Underscores (_) and number 4 should be removed;
Dollar sign ($) should be replaced with a pound sign (£);
Output strings must not be null or empty string;
Output strings should be truncated to max length of 15 chars.

3. Program design

Assumptions

Each input string is processed independently;
A default output string is returned in case of null or emplty input string, that is set as ##@@$$__%__$$@@##.

Implementation

This application contains a single class App, that defines one main method processInputStr, and three helper methods to allow incremental input processing: removal of duplicates removeDuplicateChars, removal of extra chars removeExtraChars, and replacing certain chars replaceChars;
There are a set of const values to allow easy setup of the followings:
- output size limit as OUTPUT_SIZE;
- an array of chars set to be additionally removed as OTHER_CHARS_TO_REMOVE, and
- default output string returned in case an empty/null input string is processed as DEFAULT_RESULT.

elenamorton / parser_ldc_js