Array of strings containing numbers
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Problem Statement
Create a JavaScript function that returns a new array containing only the strings from the original array that include numeric characters.
const input = ["hey", "age = 12", "pi = 3.14"];
Example 1
Input: array = ["hey", "age = 12", "pi = 3.14"]
Output: ["age = 12", "pi = 3.14"]
Solution 1: Using filter Method
function method1(arr) {
return arr.filter((v) => /[0-9]/g.test(v));
}
const array1 = ["hey", "age = 12", "pi = 3.14"];
method1(array1); //output: ["age = 12", "pi = 3.14"]
Solution 2: Using forEach Method
function method2(arr) {
const result = [];
arr.forEach((str) => {
if (/[0-9]/g.test(str)) {
result.push(str);
}
});
return result;
}
const array1 = ["hey", "age = 12", "pi = 3.14"];
method2(array1); //output: ["age = 12", "pi = 3.14"]
Solution 3: Using forEach with map for Transformation
function extractNumericStrings(arr) {
const result = [];
arr.map(str => {
if (/\d/.test(str)) {
result.push(str);
}
});
return result;
}
const array1 = ["hey", "age = 12", "pi = 3.14"];
extractNumericStrings(array1); //output: ["age = 12", "pi = 3.14"]