Generate Unique Id From String Javascript Code Example


Example 1: random id js


var ID = function () {
// Math.random should be unique because of its seeding algorithm.
// Convert it to base 36 (numbers + letters), and grab the first 9 characters
// after the decimal.
return '_' + Math.random().toString(36).substr(2, 9);
};

Example 2: javascript find unique values in array


// usage example:
var myArray = ['a', 1, 'a', 2, '1'];
var unique = myArray.filter((v, i, a) => a.indexOf(v) === i);

// unique is ['a', 1, 2, '1']

Example 3: javascript generate unique id


function uuidv4() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16);
});
}

console.log(uuidv4());

Example 4: javascript generate unique id


function randomId(): string {
const uint32 = window.crypto.getRandomValues(new Uint32Array(1))[0];
return uint32.toString(16);
}

Example 5: javascript get unique values from key


const unique = [...new Set(array.map(item => item.age))];

Example 6: javascript uniqie id


function uuid() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16);
});
}

var userID=uuid();//something like: "ec0c22fa-f909-48da-92cb-db17ecdb91c5"

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