Lodash mixins for arbitrary-precision arithmetic
Because of binary floating-point, arithmetic operations in JavaScript may imply rounding issues like:
0.1 + 0.2 = 0.30000000000000004
You will find a complete explanation about floating-point arithmetic at http://floating-point-gui.de/.
Lodash-arithmetic provides simple Lo-Dash mixins for basic arithmetic operations: addition, subtraction, multiplication and division. Even if Lo-Dash 4 natively has the methods _.add, _.subtract, _.multiply and _.divide, they do not take in account arbitrary-precision decimal.
Let's see the following examples:
// Without Lo-Dash
console.log(0.1 + 0.2 === 0.3) // false
// With Lo-Dash 4 but without the arithmetic mixins
console.log(_.add(0.1, 0.2) === 0.3) // false
// With Lo-Dash and the arithmetic mixins
console.log(_.add(0.1, 0.2) === 0.3) // trueThe easiest way is to install lodash-arithmetic as dependency:
npm install lodash-arithmetic --save_.add(0.1, 0.2); // 0.3_.subtract(0.1235, 0.1234); // 0.0001_.multiply(0.07, 100); // 7_.divide(8.2, 1000); // 0.0082_(0.1)
.add(0.2)
.multiply(77.1)
.subtract(0.12345)
.value(); // 23.00655Code licensed under MIT License.
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