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Get the total number of same objects in JavaScript
Suppose, we have an array of objects describing the routes of some flights like this −
const routes = [ { flyFrom: "CDG", flyTo: "DUB", return: 0, }, { flyFrom: "DUB", flyTo: "SXF", return: 0, }, { flyFrom: "SFX", flyTo: "CDG", return: 1, } ];
We need to count how many times there is return − 0 and how many times there is the return: 1.
The end output should look like −
for the cases where return: 0 appears 2 times --- 1 Stop for the cases where return: 1 appears 1 time --- Non-stop
Example
The code for this will be −
const routes = [ { flyFrom: "CDG", flyTo: "DUB", return: 0, }, { flyFrom: "DUB", flyTo: "SXF", return: 0, }, { flyFrom: "SFX", flyTo: "CDG", return: 1, } ]; const displaySimilar = arr => { const count = {}; arr.forEach(el => { count[el.return] = (count[el.return] || 0) + 1; }); Object.keys(count).forEach(key => { for(let i = 0; i < count[key]; i++){ if(key === '0'){ console.log('1 Stop'); } else if(key === '1'){ console.log('Non-stop'); }; } }) }; displaySimilar(routes);
Output
And the output in the console will be −
1 Stop 1 Stop Non-stop
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