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| # 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. | |