myFilter

A versatile and type-aware custom implementation of the array filter function in JavaScript. It can handle different types of elements in an array and apply a filtering function accordingly.

Features

• myFilter function similar to Array.prototype.filter.
• A Type-aware filtering for numbers, strings, objects, and more.
• Very dynamic so it can be extended for additional types and conditions.

Getting Started

Usage

1. Clone the repository:

   git clone https://github.com/JeetChauhan17/myFilter.git
   cd myFilter

2. Include the myFilter function in your project:

   function myFilter(arr, filterFunction){
       // Create a new array to hold the filtered elements
       let filteredArr = [];
       
       // Iterate over each element in the original array
       for(let i=0; i<arr.length; i++){
           let a = arr[i];
           let elementType = typeof a;
   
           // Perform different actions based on the type of the element
           switch(elementType){
               case "number":
                   if(filterFunction(a)){
                       filteredArr.push(a);
                   }
                   break;
               
               case "string":
                   if(filterFunction(a)){
                       filteredArr.push(a);
                   }
                   break;
   
               case "object":
                   if(a !== null && filterFunction(a)){
                       filteredArr.push(a);
                   }
                   break;
   
               default: 
                   break;
           }
       }
       // Return the filtered array
       return filteredArr;
   }

3. Example usage:

   const arr = [1, 2, "Jeet", 3, 4, "Arya", { "msg": "heheheha" }, "Anju", 5, null];
   
   
   // Filter function to check if a number is even
   const numEvenFn = (a) => typeof a === "number" && a % 2 === 0;
   
   // Filter function to check if a string starts with "A"
   const strStartFn = (a) => typeof a === "string" && a.startsWith("A");
   
   // Filter function to check if an object has a key "msg"
   const hasKeyFn = (a) => typeof a === "object" && a !== null && "msg" in a;
   
   
   // Filter even numbers
   const evenNums = myFilter(arr, numEvenFn);
   console.log(evenNums); // Output: [2, 4]
   
   // Filter names starting with "A"
   const namesWithA = myFilter(arr, strStartFn);
   console.log(namesWithA); // Output: ["Arya", "Anju"]
   
   // Filter objects with a key "msg"
   const objFilter = myFilter(arr, hasKeyFn);
   console.log(objFilter); // Output: [{"msg": "heheheha"}]

Contributing

If you want to contribute, feel free to do so. Just Submit a Pull Request or open an Issue to suggest add more types or improve the existing code :)

License

This project is licensed under the MIT License - see the LICENSE file for details.