extsprintf
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Package description
The extsprintf npm package provides extended sprintf-style formatting capabilities. It is designed to offer more powerful and flexible string formatting options than the traditional sprintf function found in many programming languages. This package allows for formatting strings with placeholders, enabling the insertion of variable content in a template-like fashion. It supports various formatting types, including numbers, strings, and JSON objects, making it suitable for a wide range of applications such as logging, message formatting, and text processing.
Basic String Formatting
This feature allows for basic string formatting using placeholders for strings (%s) and decimal integers (%d). It is useful for constructing messages with dynamic values.
"%s is %d years old.", 'John', 25Conditional Formatting
Conditional formatting supports inserting values from an object into a string based on property names. This is particularly useful for templating and creating more readable code.
"%(name)s is %(age)d years old.", { name: 'John', age: 25 }JSON Formatting
This feature allows for the formatting of objects as JSON strings using the %j placeholder. It's useful for logging or displaying structured data in a string format.
"%j", { name: 'John', age: 25 }sprintf-js offers similar sprintf-style formatting capabilities. It provides a rich set of format specifiers and is widely used for string formatting. Compared to extsprintf, sprintf-js focuses more on the traditional sprintf functionality and might not offer some of the extended features found in extsprintf.
util-format is another package that provides string formatting functions, similar to those in Node.js's util.format(). It supports a subset of format specifiers and can be used as a lightweight alternative to extsprintf for basic formatting needs. However, it lacks some of the advanced formatting options available in extsprintf.
Readme
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
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 objectFirst, install it:
# npm install extsprintf
Now, use it:
var mod_extsprintf = require('extsprintf');
console.log(mod_extsprintf.sprintf('hello %25s', 'world'));
outputs:
hello world
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.
FAQs
extended POSIX-style sprintf
The npm package extsprintf receives a total of 14,621,005 weekly downloads. As such, extsprintf popularity was classified as popular.
We found that extsprintf demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 14 open source maintainers collaborating on the project.
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