case-study 
Get, count, or verify uppercase and lowercase words in a string
Install
$ npm install case-study
Usage
const caseStudy = require('case-study');
const str = `The library's supposed to get all upper and lower case words.
I WANT MY MONEY BACK ... AND I'M GONNA SUE YOU.`;
caseStudy.findUpperCase(str);
// => ["I","WANT","MY","MONEY","BACK","AND","I'M",
// "GONNA","SUE","YOU"]
caseStudy.findLowerCase(str);
// => ["library's", "supposed","to","get","all","upper","and","lower","case","words"]
const wordsWithNumbers = `K2, H2O, B2B, B2C, AK47, 3G, G8, 7UP,
and gr8, 1to1, one2one, 8pm.`;
caseStudy.findUpperCase(wordsWithNumbers);
// => ["K2","H2O","B2B","B2C","AK47","3G","G8","7UP"]
caseStudy.findLowerCase(wordsWithNumbers);
// => ["and","gr8","1to1","one2one","8pm"]APIs
findUpperCase(str, options)
Returns an Array of upper case words
findLowerCase(str, options)
Returns an Array of lower case words
upperCaseExists(str, options)
Returns Boolean
lowerCaseExists(str, options)
Returns Boolean
countUpperCase(str, options)
Returns Number
countLowerCase(str, options)
Returns Number
Options
Type: Object
contraction
Type: Boolean
Default: true
Count words with contraction as one
let str = `YOU SHOULDN'T'VE HANDLED CONTRACTIONS!`;
caseStudy.findUpperCase(str, {contraction: false})
// => ["YOU","SHOULDN","T","VE","HANDLED","CONTRACTIONS"]
str = `d'y'all think I shouldn't've handled contractions?`;
caseStudy.findLowerCase(str, {contraction: false})
// => ["d","y","all","think","shouldn","t","ve","handled","contractions"]duplicate
Type: Boolean
Default: true
Include duplicate words.
let str = `WRITING ENTIRELY IN BLOCK CAPITAL LETTERS
IS SHOUTING, AND SHOUTING IS RUDE.`;
caseStudy.findUpperCase(str, {duplicate: false});
// => ["WRITING","ENTIRELY","IN","BLOCK","CAPITAL",
// "LETTERS","IS","SHOUTING","AND","RUDE"]
str = `He was a strange man, very strange man, indeed.`;
caseStudy.findLowerCase(str, {duplicate: false})
// => ["was","a","strange","man","very","indeed"]list
Type: Array
Only extract words passed in the list
let str = "FAILURE? THE WORD FAILURE IS NOT IN MY DICTIONARY!";
caseStudy.findUpperCase(str, { list: ['FAILURE'] })
// => ["FAILURE", FAILURE]
let str = `Unfortunately, we can't give you any more discount.
We've given you the maximum possible discount.`;
caseStudy.findLowerCase(str, {list: ['you', 'discount']})
// => ["you","discount","you","discount"]exclude
Type: Array
Ignore words passed in the list
let str = "PLEASE DO NOT REMOVE THE IMPORTANT PARTS OF THE SPEECH!";
caseStudy.findUpperCase(str, {exclude: ['DO', 'NOT']})
// => ["PLEASE","REMOVE","THE","IMPORTANT","PARTS","OF","THE","SPEECH"]
str = `I've just told you, it's not possible.`;
caseStudy.findLowerCase(str, {exclude: ['you', 'not']})
// => ["ve","just","told","it's","possible"]Related
License
MIT © Talha Awan