Benchmark: Ramda's `where` vs. my `whereAll` - Part 2 - Example Code From the Documentation for `R.where`

HTML Preparation code:

<script src="https://unpkg.com/ramda@0.23.0/dist/ramda.js"></script>

Script Preparation code:

// Sort of like a recursive version of Ramda's `where` (http://ramdajs.com/docs/#where).
var whereAll = R.curry((spec, obj) => {
  if (typeof obj === "undefined") {
    if (spec === null || typeof spec === "boolean") {
      return !spec
    }
    return false
  } else if (spec === false) {
    return false
  }
  var output = true
  R.forEachObjIndexed((v, k) => {
    if (v === null || typeof v === "boolean" || R.keys(v).length) {
      if (!whereAll(v, obj[k])) {
        output = false
      }
    } else if (!v(obj[k])) {
      output = false
    }
  }, spec)
  return output
})

// -----------------------------------------------------------------------------

var pred1 = R.where({
  a: R.equals("foo"),
  b: R.complement(R.equals("bar")),
  x: R.gt(R.__, 10),
  y: R.lt(R.__, 20),
})

var pred2 = whereAll({
  a: R.equals("foo"),
  b: R.complement(R.equals("bar")),
  x: R.gt(R.__, 10),
  y: R.lt(R.__, 20),
})

Tests:

Using `R.where`
pred1({a: "foo", b: "xxx", x: 11, y: 19}) pred1({a: "xxx", b: "xxx", x: 11, y: 19}) pred1({a: "foo", b: "bar", x: 11, y: 19}) pred1({a: "foo", b: "xxx", x: 10, y: 19}) pred1({a: "foo", b: "xxx", x: 11, y: 20})
Using `whereAll`
pred2({a: "foo", b: "xxx", x: 11, y: 19}) pred2({a: "xxx", b: "xxx", x: 11, y: 19}) pred2({a: "foo", b: "bar", x: 11, y: 19}) pred2({a: "foo", b: "xxx", x: 10, y: 19}) pred2({a: "foo", b: "xxx", x: 11, y: 20})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Using `R.where`
Using `whereAll`

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

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Let's break down what's being tested in this benchmark.

**Benchmark Definition**

The benchmark is comparing two approaches to implement the `where` function, which filters an object based on a set of conditions. In JavaScript, this can be achieved using Ramda's `R.where` or by creating our own implementation, denoted as `whereAll`.

**Options Compared**

We have two options being compared:

1. **Ramda's `R.where`**: This is a built-in function in the Ramda library, which provides a concise and expressive way to filter objects using functions.
2. **Custom implementation: `whereAll`**: This is our own implementation of the `where` function, written in JavaScript.

**Pros and Cons**

Here are some pros and cons for each option:

**Ramda's `R.where`**

Pros:

* Concise and expressive code
* Well-tested and maintained library
* Easy to understand and use

Cons:

* External dependency on Ramda library
* May not be suitable for all environments (e.g., Node.js, browser)

**Custom implementation: `whereAll`**

Pros:

* No external dependencies
* Can be optimized for specific use cases or environments
* More control over the implementation

Cons:

* Requires more code and understanding of functional programming concepts
* May be less efficient than Ramda's implementation due to additional overhead

**Library Used (Ramda)**

The `where` function in Ramda is a higher-order function that takes two arguments: an object to filter and a predicate function. The predicate function returns a boolean value indicating whether the condition is met for each property of the object.

**Special JS Feature/ Syntax**

There are no special JavaScript features or syntax used in this benchmark. However, it's worth noting that Ramda uses a functional programming style, which can be unfamiliar to some developers.

**Other Considerations**

When choosing between these two options, consider the following:

* If you need a concise and expressive way to filter objects, Ramda's `R.where` might be a good choice. However, if you're working on a project with limited dependencies or specific optimization needs, the custom implementation (`whereAll`) might be more suitable.
* Keep in mind that Ramda's implementation may have additional overhead due to its functional programming style.

**Alternatives**

If you're interested in exploring other alternatives, here are some options:

* Lodash: Another popular JavaScript library with a `where` function similar to Ramda's.
* Microsoft's Filter: A simpler filtering function provided by the JavaScript engine.
* Vanilla JavaScript: You can implement your own filtering functions using basic JavaScript constructs like loops and conditional statements.

I hope this explanation helps you understand what's being tested in this benchmark!

Related benchmarks:

Ramda's `where` vs. my `whereAll` - Part 2 - Example Code From the Documentation for `R.where` (version: 5)

Comparing performance of: Using `R.where` vs Using `whereAll`

Created: 9 years ago by: Registered User

Jump to the latest result

Using `R.where`

Using `whereAll`

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):