CFP - Docs - expand

expand

(length: number, char: Character) => (aString: string) => string

Expand a string to length with char

Try It

const expandTo3 = expand(3, '-')
const expandTo5 = expand(5, '-')

expandTo3('ab') // is 'ab-'
expandTo3('abc') // is 'abc'

expandTo5('ab') // is '-ab--'
expandTo5('abc') // is '-abc-'
const expandTo3 = expand(3, '-')
const expandTo5 = expand(5, '-')

expandTo3('ab') // is 'ab-'
expandTo3('abc') // is 'abc'

expandTo5('ab') // is '-ab--'
expandTo5('abc') // is '-abc-'

Try It

const expandTo3 = expand(3, '-')
const expandTo5 = expand(5, '-')

expandTo3('ab') // is 'ab-'
expandTo3('abc') // is 'abc'

expandTo5('ab') // is '-ab--'
expandTo5('abc') // is '-abc-'
const expandTo3 = expand(3, '-')
const expandTo5 = expand(5, '-')

expandTo3('ab') // is 'ab-'
expandTo3('abc') // is 'abc'

expandTo5('ab') // is '-ab--'
expandTo5('abc') // is '-abc-'

Sometimes we want a string to have a certain length. Below, we format a comment header stating that the code should not be modified.

Try It

const headerWidth = 30
const border = '='.repeat(headerWidth)

const headerLines = [border, 'Autogenerated code', 'Do not modify!', border]

const expandLine = expand(headerWidth, ' ')

const header = headerLines.map(line => `// |${expandLine(line)}|`).join('\n')
console.log(header)
// prints
// |==============================|
// |      Autogenerated code      |
// |        Do not modify!        |
// |==============================|
const headerWidth = 30
const border = '='.repeat(headerWidth)

const headerLines = [border, 'Autogenerated code', 'Do not modify!', border]

const expandLine = expand(headerWidth, ' ')

const header = headerLines.map(line => `// |${expandLine(line)}|`).join('\n')
console.log(header)
// prints
// |==============================|
// |      Autogenerated code      |
// |        Do not modify!        |
// |==============================|

Try It

const headerWidth = 30
const border = '='.repeat(headerWidth)

const headerLines = [
  border,
  'Autogenerated code',
  'Do not modify!',
  border,
]

const expandLine = expand(headerWidth, ' ')

const header = headerLines
  .map(line => `// |${expandLine(line)}|`)
  .join('\n')
console.log(header)
// prints
// |==============================|
// |      Autogenerated code      |
// |        Do not modify!        |
// |==============================|
const headerWidth = 30
const border = '='.repeat(headerWidth)

const headerLines = [
  border,
  'Autogenerated code',
  'Do not modify!',
  border,
]

const expandLine = expand(headerWidth, ' ')

const header = headerLines
  .map(line => `// |${expandLine(line)}|`)
  .join('\n')
console.log(header)
// prints
// |==============================|
// |      Autogenerated code      |
// |        Do not modify!        |
// |==============================|