Package Exports

stringd

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (stringd) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

STRING-D

NodeJS String Variable Parser

Create parsable strings using template formats by argument mapping.

Similar to printf but supports nesting and exclusive recursions

Installing

Via NPM:

npm install stringd

Usage

// Node CommonJS
const stringd = require('stringd');
// Or ES6
import stringd from 'stringd';

<!-- Or in the Browser -->
<script src="stringd/dist/index.js"></script>

Examples

stringd('Hello :{name}', {name: 'World'});
// Hello World

stringd(':{last}, :{first} :{last}', {last: 'Doe', first: 'John'});
// Doe, John Doe

API

stringd(template, object[, ignore])

template: <string>
object: <object>
ignore: <string[]>
Returns: <string>

Parse the template with the variables stated in object, ignore the variables defined in the ignore array

Features

Multi parse methods

Whichever is more comfortable for you would work just fine

stringd('Hello :{name}', {name: 'World'});  // Hello World
stringd('Hello %{name}', {name: 'World'});  // Hello World
stringd('Hello ${name}', {name: 'World'});  // Hello World
stringd('Hello :{name%}', {name: 'World'}); // Hello World
stringd('Hello %{name%}', {name: 'World'}); // Hello World
stringd('Hello ${name%}', {name: 'World'}); // Hello World

Nesting

assert.equal('John Davis', stringd(':{name}', {
  name: ':{first} :{last}',
  last: 'Davis',
  first: 'John',
}));

Functional Evaluation

assert.equal(
  'Hello John Davis, you have contributed $585 in the span of 13 months',
  stringd(':{name:parsed}', {
    name: ':{first} :{last}',
    last: 'Davis',
    first: 'John',
    greeting: 'Hello :{name}',
    months: 13,
    duration: ':{months} months',
    contribution: 45,
    // Functions get the entire template object as an argument
    // so you can do advanced processing
    cash: ({contribution, months}) => contribution * months,
    'name:parsed': `:{greeting}, you have contributed $:{cash} in the span of :{duration}`,
  })
);

Forward Padding, Space

assert.equal('   10', stringd(':5{val}', {val: 10}));

End Padding, Space

assert.equal('10   ', stringd(':-5{val}', {val: 10}));

Forward Padding, Zero

assert.equal('00010', stringd(':05{val}', {val: 10}));

End Padding, Zero

assert.equal('10000', stringd(':-05{val}', {val: 10}));

Complex Nesting with exclusive recursion

Recursive nesting is unparsed at the second level, otherwise, it continues until its done parsing the entire string

assert.equal(
  'James:{name} :{name} :{data} :{data} :{all} :{name} :{data}Jack :{data}',
  stringd(':{name} :{misc}', {
    name: ':{first}:{data}:{last}',
    first: 'James',
    last: 'Jack',
    misc: ':{data}',
    data: ':{name} :{all}',
    all: ':{name} :{misc} :{data} :{all} :{name} :{misc}',
  })
);

Iterative processing

assert.equal('      2364', stringd(stringd('::{pad}{price}', {pad: 10}), {price: 2364}))

Precedence

stringd replaces keys in order precedence. Keys that appear first are replaced first

stringd( // str key appears first
  stringd(':{tro:{str}}', {str: 'y', 'tro:{str}': ':{tron}'}),
  { tron: 'Movie', troy: 'Dude' }
); // Dude

stringd( // str key appears later
  stringd(':{tro:{str}}', {'tro:{str}': ':{tron}', str: 'y'}),
  { tron: 'Movie', troy: 'Dude' }
); // Movie

Development

Building

Feel free to clone, use in adherance to the license and perhaps send pull requests

git clone https://github.com/miraclx/stringd.git
cd stringd
npm install
# hack on code
npm run build
npm test

Testing

Tests are executed with Jest. To use it, simple run npm install, it will install Jest and its dependencies in your project's node_modules directory followed by npm run build and finally npm test.

To run the tests:

npm install
npm run build
npm test

stringd