In my previous blog, I explained how the Array length property works and also created my own version of it without using the built-in length property.Today, I continued the same learning journey by creating my own versions of JavaScript array methods:
toString()
Instead of directly using JavaScript's built-in methods, I tried to understand the internal working of these methods by implementing them manually.
Creating My Own toString() Method
The toString() method converts an array into a string.
Example:
const arr = [1, 2, 3];
console.log(arr.toString()); // "1,2,3"
In this program, I manually converted the array into a string.
My Approach
arr = [1, 2, 3, 4, 5];
str = "";
len = countOfLength();
for (let count of arr) {
if (count < len) {
str = str + count + ",";
} else {
str = str + count;
}
}
function countOfLength() {
let lengthDemo = 0;
for (let count of arr) {
lengthDemo++;
}
return lengthDemo;
}
console.log(str);
How It Works
Step 1: Count the array length
len = countOfLength();
I first calculated the array length manually using a custom function.
function countOfLength() {
let lengthDemo = 0;
for (let count of arr) {
lengthDemo++;
}
return lengthDemo;
}
This function loops through the array and counts the total number of elements.
Step 2: Loop through the array
for (let count of arr)
This loop visits every element one by one.
Step 3: Build the string
str = str + count + ",";
Each value is added to the string along with a comma.
For the last element, I avoided adding an extra comma.
Finally, the output becomes:
"1,2,3,4,5"
Building methods manually is a great way to understand how JavaScript works internally. Instead of only using built-in methods, implementing them ourselves helps improve problem-solving skills and strengthens JavaScript fundamentals.
I will continue this series by implementing more JavaScript array methods manually and share my learning journey step by step in upcoming blogs.
Stay tuned for the next part! 👋
