fibonacci

Module for node.js to calculate fibonacci numbers for one or endless iterations, until you run out of memory.

Using the bn.js module it can return numbers of any size without being limited by the hardcoded javascript Number.MAX_LIMIT.

Usage

Just one

Find one fibonacci number at 3000 iterations:

const fibonacci = require ('fibonacci');
const bigNumber = fibonacci.iterate (3000);
console.log (bigNumber);

Result:

{ number: '410615886307971260333568378719267105220125108637369252408885430926905584274113403731330491660850044560830036835706942274588569362145476502674373045446852160486606292497360503469773453733196887405847255290082049086907512622059054542195889758031109222670849274793859539133318371244795543147611073276240066737934085191731810993201706776838934766764778739502174470268627820918553842225858306408301661862900358266857238210235802504351951472997919676524004784236376453347268364152648346245840573214241419937917242918602639810097866942392015404620153818671425739835074851396421139982713640679581178458198658692285968043243656709796000',
length: 627,
iterations: '3000',
ms: 208 }

Many numbers

Get all numbers up to 4 seconds.

WARNING: it is very important that you run the iterate() function AFTER the .on('result') event, otherwise the iteration will continue forever without emitting the events!

fibonacci.on ('result', num => {
  console.log (`${num.iterations} / ${num.number}\n`);

  if (num.ms > 4000) {
    console.log ('Done!');
    fibonacci.kill();
  }
});

// run this AFTER everything
fibonacci.iterate();

Here you see I use the result event to catch each result, the num.ms property to figure out how many milliseconds have passed and finally kill() to stop the iteration.

Installation

npm i fibonacci

Methods

Method .iterate

( [max_iterations] )

Run the iteration

argument | type | default | description :----------------|:-------|:--------|:----------- [max_iterations] | number | | Limit iterations, otherwise continue forever

Without this argument it will continue untill kill() is called, the process terminated or system ran out of memory.

Returns

resultObject with these elements:

property | type | description :----------|:--------|:----------- number | string | calculated number length | string | number of digits iterations | string | amount of iterations to find number ms | integer | duration in milliseconds

Method .kill

( )

Stop the iteration loop.

Events

Event result

( resultObject )

Emitted when a result is found.

Callback

resultObject with these elements:

property | type | description :----------|:--------|:----------- number | string | calculated number length | string | number of digits iterations | string | amount of iterations to find number ms | integer | duration in milliseconds

Event done

( resultObject )

Emitted when max_iterations is reached, see Event result for details.

Unlicense

This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means.

In jurisdictions that recognize copyright laws, the author or authors of this software dedicate any and all copyright interest in the software to the public domain. We make this dedication for the benefit of the public at large and to the detriment of our heirs and successors. We intend this dedication to be an overt act of relinquishment in perpetuity of all present and future rights to this software under copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

For more information, please refer to https://unlicense.org/

Author

Franklin | Buy me a coffee