extsprintf
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    1.3.0 • Public • Published

    extsprintf: extended POSIX-style sprintf

    Stripped down version of s[n]printf(3c). We make a best effort to throw an exception when given a format string we don't understand, rather than ignoring it, so that we won't break existing programs if/when we go implement the rest of this.

    This implementation currently supports specifying

    • field alignment ('-' flag),
    • zero-pad ('0' flag)
    • always show numeric sign ('+' flag),
    • field width
    • conversions for strings, decimal integers, and floats (numbers).
    • argument size specifiers. These are all accepted but ignored, since Javascript has no notion of the physical size of an argument.

    Everything else is currently unsupported, most notably: precision, unsigned numbers, non-decimal numbers, and characters.

    Besides the usual POSIX conversions, this implementation supports:

    • %j: pretty-print a JSON object (using node's "inspect")
    • %r: pretty-print an Error object

    Example

    First, install it:

    # npm install extsprintf
    

    Now, use it:

    var mod_extsprintf = require('extsprintf');
    console.log(mod_extsprintf.sprintf('hello %25s', 'world'));
    

    outputs:

    hello                     world
    

    Also supported

    printf: same args as sprintf, but prints the result to stdout

    fprintf: same args as sprintf, preceded by a Node stream. Prints the result to the given stream.

    Keywords

    none

    Install

    npm i [email protected]

    Version

    1.3.0

    License

    MIT

    Last publish

    Collaborators

    • dbuell
    • tchameroy
    • todd.whiteman
    • kusor
    • wyatt
    • michael.hicks
    • bahamat
    • chudley
    • trentm
    • dap
    • jclulow
    • arekinath
    • melloc
    • kellymclaughlin