@stdlib/string-left-pad-cli NPM

lpad

Left pad a string.

Installation

To use as a general utility, install the CLI package globally

npm install -g @stdlib/string-left-pad-cli

Usage

Usage: lpad [options] --len=<length> [<string>]

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.
         --len length          Minimum string length.
         --pad str             String used to pad. Default: ' '.
         --split sep           Delimiter for stdin data. Default: '/\\r?\\n/'.

Notes

If the split separator is a regular expression, ensure that the split option is either properly escaped or enclosed in quotes.

# Not escaped...
$ echo -n $'beep\nboop' | lpad -len 8 --split /\r?\n/

# Escaped...
$ echo -n $'beep\nboop' | lpad -len 8 --split /\\r?\\n/

The implementation ignores trailing delimiters.

Examples

$ lpad beep --len 10 --pad b
bbbbbbbeep

To use as a standard stream,

$ echo -n 'beep' | lpad --len 8
    beep

By default, when used as a standard stream, the implementation assumes newline-delimited data. To specify an alternative delimiter, set the split option.

$ echo -n 'boop\tbeep' |  lpad --len 8 --split '\t'
    boop
    beep

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.