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Delete duplicate elements based on first letter – JavaScript
We are required to write a JavaScript function that takes in array of strings and delete every one of the two string that start with the same letter.
For example, If the actual array is −
const arr = ['Apple', 'Jack' , 'Army', 'Car', 'Jason'];
Then, we have to keep only one string in the array, so one of the two strings starting with A should get deleted. In the same way, the logic follows for the letter J in the above array.
Let’s write the code for this function −
Example
const arr = ['Apple', 'Jack' , 'Army', 'Car', 'Jason'];
const delelteSameLetterWord = arr => {
const map = new Map();
arr.forEach((el, ind) => {
if(map.has(el[0])){
arr.splice(ind, 1);
}else{
map.set(el[0], true);
};
});
};
delelteSameLetterWord(arr);
console.log(arr);Output
Following is the output in the console −
[ 'Apple', 'Jack', 'Car' ]
Updated on: 14-Sep-2020
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