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JavaScript function that generates all possible combinations of a string
We are required to write a JavaScript function that takes in a string as the only argument. The function should generate an array of strings that contains all possible contiguous substrings that exist in the array.
Example
Following is the code −
const str = 'Delhi';
const allCombinations = (str1 = '') => {
const arr = [];
for (let x = 0, y=1; x < str1.length; x++,y++) {
arr[x]=str1.substring(x, y);
};
const combination = [];
let temp= "";
let len = Math.pow(2, arr.length);
for (let i = 0; i < len ; i++){
temp= "";
for (let j=0;j<arr.length;j++) {
if ((i & Math.pow(2,j))){
temp += arr[j];
}
};
if (temp !== ""){
combination.push(temp);
}
}
return combination;
};
console.log(allCombinations(str));Output
Following is the output on console −
[ 'D', 'e', 'De', 'l', 'Dl', 'el', 'Del', 'h', 'Dh', 'eh', 'Deh', 'lh', 'Dlh', 'elh', 'Delh', 'i', 'Di', 'ei', 'Dei', 'li', 'Dli', 'eli', 'Deli', 'hi', 'Dhi', 'ehi', 'Dehi', 'lhi', 'Dlhi', 'elhi', 'Delhi' ]
Updated on: 11-Dec-2020
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