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@bignum/template-light

v0.2.0

Published

Write formulas with template literals.

Downloads

13

Readme

@bignum/template-light

Write formulas with template literals. (light version)

This is the light version of @bignum/template. It has significantly more limited functionality than @bignum/template, but is much smaller.

NPM license NPM version NPM downloads NPM downloads NPM downloads NPM downloads NPM downloads

🚀 Features

  • You can write formulas with template literals.
    (f`${0.3} - ${0.1}` is easier to read than a statement like new MyNum(0.3).minus(0.1).)
  • Prevent rounding errors by calculating with rational numbers using BigInt.
  • There are no dependencies and can be minified to 2.6kb.

Note that although no rounding is performed during calculations, the calculation results are returned to Number, so values that cannot be held by Number may be rounded.

If you want more operations and more rounding avoidance, consider using @bignum/template.

💿 Installation

npm install @bignum/template-light

📖 Usage

import { f } from "@bignum/template-light";

const result = f`${0.1} + ${0.1} * ${2}`;
console.log(result); // 0.3

// Prevent rounding errors by calculating with rational numbers using BigInt.
console.log(f`${0.2} + ${0.1}`); // 0.3
console.log(0.2 + 0.1); // 0.30000000000000004

🧮 API

f

Perform calculations using template literals.

Example:

import { f } from "@bignum/template-light";

console.log(f`${0.1} + ${0.2}`); // 0.3

📝 Supported Syntax

Operators

The following operators are supported:

/* Arithmetic Operators */
// add
f`${0.1} + ${0.2}`; // 0.3
// subtract
f`${0.3} - ${0.1}`; // 0.2
// multiply
f`${0.07} * ${100}` // 7
// divide
f`${0.6} / ${0.2}`; // 3
// modulo
f`${0.6} % ${0.2}`; // 0

/* Parentheses */
f`(${0.1} + ${0.2}) * ${10}`; // 3
f`${0.1} + ${0.2} * ${10}`; // 2.1

Operand

Substitutions in the template literal are considered operands.

f`${0.2} + ${0.1}`; // 0.3