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substringAfter

Return the part of a string after a specified substring.

Installation

npm install @stdlib/string-substring-after

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
• To use as a general utility for the command line, install the corresponding CLI package globally.

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

var substringAfter = require( '@stdlib/string-substring-after' );

substringAfter( str, search[, fromIndex] )

Returns the part of a string after a specified substring.

var str = 'beep boop';
var out = substringAfter( str, 'o' );
// returns 'op'

out = substringAfter( str, ' ' );
// returns 'boop'

By default, the search starts at the beginning of the string. To start searching from a different index, provide a fromIndex argument:

var str = 'boop baz boop';
var out = substringAfter( str, 'o', 3 );
// returns 'op'

Notes

• If a substring is not present in a provided string, the function returns an empty string.
• If provided an empty substring, the function returns the input string.
• If fromIndex is less than 0 or greater than str.length, the search starts at index 0 and str.length, respectively.

Examples

var substringAfter = require( '@stdlib/string-substring-after' );

var str = 'To be, or not to be, that is the question.';
var out = substringAfter( str, ', ' );
// returns 'or not to be, that is the question.'

out = substringAfter( str, 'to be' );
// returns ', that is the question.'

out = substringAfter( str, 'question.' );
// returns ''

out = substringAfter( str, 'xyz' );
// returns ''

out = substringAfter( str, '' );
// returns 'To be, or not to be, that is the question.'

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CLI

Installation

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

npm install -g @stdlib/string-substring-after-cli

Usage

Usage: substring-after [options] --search=<string> [<string>]

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.
         --search string       Search string.
         --from-index int      Start index. Default: 0.
         --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 $'foo\nbar\nbaz' | substring-after --search a --split /\r?\n/
  
  # Escaped...
  $ echo -n $'foo\nbar\nbaz' | substring-after --search a --split /\\r?\\n/

• The implementation ignores trailing delimiters.

Examples

$ substring-after abcdefg --search d
efg

To use as a standard stream,

$ echo -n $'bar\nbaz' | substring-after --search b
ar
az

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 'bar\tbaz' | substring-after --search b --split '\t'
ar
az

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See Also

• @stdlib/string-substring-before: return the part of a string before a specified substring.
• @stdlib/string-substring-before-last: return the part of a string before the last occurrence of a specified substring.
• @stdlib/string-substring-after-last: return the part of a string after the last occurrence of a specified substring.

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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.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.