• 1. Utility
  • 1.1. Motivations
  • 1.2. Create ranges in javascript using for of.
  • 1.3. Evaluate complex comparator chained terms as an expression.
  • 1.4. Installation
  • 1.5. Usage
  • 1.6. Contributing
  • 1.7. License

1. Utility

1.1. Motivations

https://www.youtube.com/watch?v=HPfPFM1wNmE

1.2. Create ranges in javascript using for of.

I provide two methods you can use for this:

The performance may be different based on the environment you are using. Use the one that is faster for you, but both algorithms have the same complexity bound.

1.3. Evaluate complex comparator chained terms as an expression.

Example : We need to evaluate the expression 5 < 12 >= 22.

The above expression should evaluate to false, since 5 < 12 but 12 is not >= 22.

Motivation : Other languages like python currently have this functionality

utility-range-and-complex-expressions is a js library for dealing with common types of problems. This library will be updated to create a curated list of fast performing utility methods, with the fastest asymptotic time bounds available, and various different implementation styles which can result in better performance by offering options better suited to an environment.

Some implementations of the same problem may differ slightly in the end result because the implementations themselves may be slightly different and therefore expect different configurations. This behavior is useful in cases where you do not want a method to throw an error, or a method where you require the method to fail gracefully, or in the case where you would like the method to try to do the work, without having the method implementation specifically throw an error.

Some implementations may not different in any way, other than how they are implemented, and do not have different expectations or results.

1.4. Installation

Use the npm package manager to install at the directory where your package.json is located.

npm install @toorieaa/utility-range-and-complex-expressions

1.5. Usage

import * as Utility from "@toorieaa/utility-range-and-complex-expressions";

const result = Utility.evaluateAComplexComparisonExpression(
  "3",
  "==",
  3,
  "===",
  "3"
);
console.debug(result); //false

const result2 = Utility.evaluateAComplexComparisonExpression(
  "3",
  "<=",
  3,
  ">",
  "2"
);
console.debug(result2); //true

//25
//26
//27
//28
//29
for (const interim of Utility.createRange2(25, 30)) {
  console.log(interim);
}

//
for (const interim of Utility.createRange2(75, 75)) {
  console.log(interim);
}

//74
for (const interim of Utility.createRange2(74, 75)) {
  console.log(interim);
}

//25
//26
//27;
//28;
//29;
for (const interim of Utility.createRange1(25, 30)) {
  console.log(interim);
}

//
for (const interim of Utility.createRange1(75, 75)) {
  console.log(interim);
}

//75
for (const interim of Utility.createRange1(75, 75, true)) {
  console.log(interim);
}

1.6. Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

1.7. License

[MIT]