![Introducing Enhanced Alert Actions and Triage Functionality](https://cdn.sanity.io/images/cgdhsj6q/production/fe71306d515f85de6139b46745ea7180362324f0-2530x946.png?w=800&fit=max&auto=format)
Product
Introducing Enhanced Alert Actions and Triage Functionality
Socket now supports four distinct alert actions instead of the previous two, and alert triaging allows users to override the actions taken for all individual alerts.
big.js
Advanced tools
Package description
The big.js npm package is a library for arbitrary-precision decimal arithmetic. It allows you to perform calculations on numbers with a large number of digits without losing precision, which is a common issue with JavaScript's native Number type.
Arithmetic Operations
Perform precise addition, subtraction, multiplication, and division operations.
{"addition": "new Big('0.1').plus(new Big('0.2')).toString()", "subtraction": "new Big('0.3').minus(new Big('0.1')).toString()", "multiplication": "new Big('0.2').times(new Big('0.3')).toString()", "division": "new Big('0.3').div(new Big('0.2')).toString()"}
Comparison Operations
Compare two Big numbers to determine equality, or whether one is greater than or less than the other.
{"equals": "new Big('1.0').eq(new Big('1.00'))", "greaterThan": "new Big('2').gt(new Big('1.9999'))", "lessThan": "new Big('0.1').lt(new Big('0.2'))"}
Rounding
Round Big numbers to a specified number of decimal places, or convert a Big number to a fixed-point notation string.
{"round": "new Big('0.12345').round(2).toString()", "toFixed": "new Big('0.12345').toFixed(2)"}
Configuration
Configure the number of decimal places for rounding and the rounding mode (e.g., round half up, round down, etc.).
{"setDP": "Big.DP = 10", "setRM": "Big.RM = 1"}
bignumber.js is another arbitrary-precision decimal and non-decimal arithmetic library with similar functionality to big.js. It provides more features, such as support for non-decimal bases, but it might be slower for some operations due to its broader scope.
decimal.js is a library for arbitrary-precision arithmetic that is similar to big.js but with additional features like trigonometric and logarithmic functions, which big.js does not have. It also allows for immutable Decimal instances.
fraction.js is focused on rational numbers (fractions) and provides arithmetic operations for them. It is different from big.js, which deals with decimal numbers, but it can be used for high-precision calculations where representing numbers as fractions is more appropriate.
Changelog
2.0.0
abs
method and replaced cmp
with eq
, gt
, gte
, lt
, and lte
methods.Readme
A small, fast Javascript library for arbitrary-precision decimal arithmetic.
The little sister to bignumber.js.
toExponential
, toFixed
and toPrecision
methods of Javascript's Number typesqrt
methodThe library is the single Javascript file big.js (or big.min.js, which is big.js minified).
It can be loaded via a script tag in an HTML document for the browser
<script src='./relative/path/to/big.js'></script>
or as a CommonJS, Node.js or AMD module using require
.
For Node, put the big.js file into the same directory as the file that is requiring it and use
var Big = require('./big');
or put it in a node_modules directory within the directory and use require('big')
.
To load with AMD loader libraries such as requireJS:
require(['big'], function(Big) {
// Use Big here in local scope. No global Big.
});
In all examples below, var
, semicolons and toString
calls are not shown.
If a commented-out value is in quotes it means toString
has been called on the preceding expression.
The library exports a single function: Big, the constructor of Big number instances.
It accepts a value of type Number, String or Big number Object.
x = new Big(123.4567)
y = Big('123456.7e-3') // 'new' is optional
z = new Big(x)
x.eq(y) && x.eq(z) && y.eq(z) // true
A Big number is immutable in the sense that it is not changed by its methods.
0.3 - 0.1 // 0.19999999999999998
x = new Big(0.3)
x.minus(0.1) // "0.2"
x // "0.3"
The methods that return a Big number can be chained.
x.div(y).plus(z).times(9).minus('1.234567801234567e+8').plus(976.54321).div('2598.11772')
x.sqrt().div(y).pow(3).gt(y.mod(z)) // true
Like Javascript's Number type, there are toExponential
, toFixed
and toPrecision
methods.
x = new Big(255.5)
x.toExponential(5) // "2.55500e+2"
x.toFixed(5) // "255.50000"
x.toPrecision(5) // "255.50"
The maximum number of decimal places and the rounding mode used to round the results of the div
, sqrt
and pow
(with negative exponent) methods is determined by the value of the DP
and RM
properties of the Big
number constructor.
The other methods always give the exact result.
Big.DP = 10
Big.RM = 1
x = new Big(2);
y = new Big(3);
z = x.div(y) // "0.6666666667"
z.sqrt() // "0.8164965809"
z.pow(-3) // "3.3749999995"
z.times(z) // "0.44444444448888888889"
z.times(z).round(10) // "0.4444444445"
The value of a Big number is stored in a decimal floating point format in terms of a coefficient, exponent and sign.
x = new Big(-123.456);
x.c // "1,2,3,4,5,6" coefficient (i.e. significand)
x.e // 2 exponent
x.s // -1 sign
For futher information see the API reference in the doc folder.
The test directory contains the test scripts for each Big number method.
The tests can be run with Node or a browser.
To test a single method, from a command-line shell at the test/ directory, use e.g.
$ node toFixed
To test all the methods
$ node every-test
For the browser, see single-test.html and every-test.html in the test/browser/ directory.
big-vs-number.html enables some of the methods of big.js to be compared with those of Javascript's Number type.
The perf directory contains two applications and a lib directory containing the BigDecimal libraries used by both.
big-vs-bigdecimal.html tests the performance of big.js against the Javascript translations of two versions of BigDecimal, its use should be more or less self-explanatory. (The GWT version doesn't work in IE 6.)
The BigDecimal in Node's npm registry is the GWT version. Despite its seeming popularity I have found it to have some serious bugs, see the Node script perf/lib/bigdecimal_GWT/bugs.js for examples of flaws in its remainder, divide and compareTo methods.
bigtime.js is a Node command-line application which tests the performance of big.js against the GWT version of BigDecimal from the npm registry.
For example, to compare the time taken by the big.js plus
method and the BigDecimal add
method:
$ node bigtime plus 10000 40
This will time 10000 calls to each, using operands of up to 40 random digits and will check that the results match.
For help:
$ node bigtime -h
I.e. minify.
For Node, if uglify-js is installed globally ( npm install uglify-js -g
) then
uglifyjs -o ./big.min.js ./big.js
will create big.min.js.
The big.min.js already present was created with Microsoft Ajax Minifier 4.91, as it produced a smaller file size.
Feedback is welcome.
Bugs/comments/questions?
Open an issue, or email
Michael Mclaughlin
M8ch88l@gmail.com
Bitcoin donation to:
1DppGRQSjVSMgGxuygDEHQuWEdTiVEzJYG
Thank you
See LICENCE.
####2.0.0
abs
method and replaced cmp
with eq
, gt
, gte
, lt
, and lte
methods.####1.0.1
####1.0.0
FAQs
A small, fast, easy-to-use library for arbitrary-precision decimal arithmetic
The npm package big.js receives a total of 15,898,807 weekly downloads. As such, big.js popularity was classified as popular.
We found that big.js demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Product
Socket now supports four distinct alert actions instead of the previous two, and alert triaging allows users to override the actions taken for all individual alerts.
Security News
Polyfill.io has been serving malware for months via its CDN, after the project's open source maintainer sold the service to a company based in China.
Security News
OpenSSF is warning open source maintainers to stay vigilant against reputation farming on GitHub, where users artificially inflate their status by manipulating interactions on closed issues and PRs.