Verbal_Expressions

JS Verbal Expressions - HMOS

Verbal Expressions is a Javascript library that helps construct difficult regular expressions.

Not everyone is a regex expert, and in practical use cases, a developer needs a semantic, understandable and API-based approach for string matching.

This modified and updated utility library is now completely ready for tackling complex problems in Harmony OS.

Installation Instructions

npm install https://github.com/holy-script/Verbal_Expressions

Or

npm install https://github.com/applibgroup/Verbal_Expressions

After Installation, For Local Demonstration, Run

npm install

Then

npx json-server --watch db.json

Change Log

• A complete overhaul of the library structure to support working imports in HMOS

• Addition of 4 lookaround combinations (positive / negative, lookahead / lookbehind)

• Autocomplete and ESLint support with helpful information on the new API functionalities as you code

Examples

Here are some simple examples to give an idea of how VerbalExpressions works:

Testing if we have a valid URL

// Create an example of how to test for correctly formed URLs
const tester = VerEx()
    .startOfLine()
    .then('http')
    .maybe('s')
    .then('://')
    .maybe('www.')
    .anythingBut(' ')
    .endOfLine();

// Create an example URL
const testMe = 'https://www.google.com';

// Use RegExp object's native test() function
if (tester.test(testMe)) {
    alert('We have a correct URL'); // This output will fire
} else {
    alert('The URL is incorrect');
}

console.log(tester); // Outputs the actual expression used: /^(http)(s)?(\:\/\/)(www\.)?([^\ ]*)$/

Replacing strings

// Create a test string
const replaceMe = 'Replace bird with a duck';

// Create an expression that seeks for word "bird"
const expression = VerEx().find('bird');

// Execute the expression like a normal RegExp object
const result = expression.replace(replaceMe, 'duck');

// Outputs "Replace duck with a duck"
alert(result);

Shorthand for string replace

const result = VerEx().find('red').replace('We have a red house', 'blue');

// Outputs "We have a blue house"
alert(result);