Iterating over a loop to display a specific selection of elements from a list

Question

Iterating over a loop to display a specific selection of elements from a list

Just starting out with coding and posting for the first time here. I apologize if this question has already been answered, but I'm not sure what exactly to search for anyway...

I'm working on a for loop to render elements from an array pulled from an API. My aim is to display only 10 items based on a specific criteria rather than just the first 10 items in the array.

Here's an example:

for(let i=0;i<json.length;i++)
{
    let product = json[i];
    let category = product.category;
    
    renderProduct(); //this function prints the product to the DOM
 }

In my API, each object has a category - let's say some are X, some are Y, some are Z, some are Q, etc... My goal is to display the first 10 objects that have the category X. I hope this explanation makes sense. Thank you all for your help and input!

javascript arrays for-loop

Answer 1

Answer №1

To browse through products based on a specific category, you can implement a loop that checks the category and skips to the next iteration if it is not the desired one. You can also use a counter to track the number of relevant products displayed and exit the loop when reaching a specified count.

let displayCount = 8;
for (const item of productArray) {
    if (item.category !== 'Y') continue;
    showProduct(item);
    if (!--displayCount) break;
}

Answer 2

To browse through products based on a specific category, you can implement a loop that checks the category and skips to the next iteration if it is not the desired one. You can also use a counter to track the number of relevant products displayed and exit the loop when reaching a specified count.

let displayCount = 8;
for (const item of productArray) {
    if (item.category !== 'Y') continue;
    showProduct(item);
    if (!--displayCount) break;
}

Answer 3

Answer №2

To ensure efficiency, loop through the array to check for specific categories and limit the results to the top ten products:

const items = [{id:1,category:'A'},{id:2,category:'B'},{id:3,category:'C'}...]; // array containing product items
const topProducts = [];
for(let i=0; i<items.length; i++)
{
  let item = items[i];
  let category = item.category;
  if(category === 'A' && topProducts.length <= 9){
    topProducts.push(item);
  }
  if(topProducts.length >= 10){
    break;
  }
}
console.log('Top 10 items in Category A:', topProducts);
renderProduct(); // function to display products on the webpage

Take a look at this example HERE

Best of luck!

Answer 4

To ensure efficiency, loop through the array to check for specific categories and limit the results to the top ten products:

const items = [{id:1,category:'A'},{id:2,category:'B'},{id:3,category:'C'}...]; // array containing product items
const topProducts = [];
for(let i=0; i<items.length; i++)
{
  let item = items[i];
  let category = item.category;
  if(category === 'A' && topProducts.length <= 9){
    topProducts.push(item);
  }
  if(topProducts.length >= 10){
    break;
  }
}
console.log('Top 10 items in Category A:', topProducts);
renderProduct(); // function to display products on the webpage

Take a look at this example HERE

Best of luck!

Iterating over a loop to display a specific selection of elements from a list

Answer №1

Answer №2

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