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Measuring String Length

  • The len() function in Python allows us to find the length of a string
  • Use '.length' in JavaScript to do this as well


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    Measuring String Length

    • The len() function in Python allows us to find the length of a string
    • Use .length in JavaScript to do this as well
    %%js
console.log("Hello".length);

    <IPython.core.display.Javascript object>

    String Case Convertion

    • Uppercase: Convert to uppercase using .upper() in Python, .toUpperCase() in JS
    • Lowercase: Convert to lowercase using .lower() in Python, .toLowerCase() in JS
    %%js
console.log("hello".toUpperCase());
console.log("HELLO".toLowerCase());

    <IPython.core.display.Javascript object>

    String Slicing

    • Through string slicing, we can access a part of the string using indexes
    • Each character in a string gets assigned a index, starting from 0
    • Syntax in Python is [startindex:endindex]
    • Syntax in JS is .slice(startindex, endindex)
    %%js
console.log("Hello Brawler".slice(0, 5));

    <IPython.core.display.Javascript object>

    Finding Substrings

    • Searches for a substring and returns its position within a overlaying string
    • .find() in Python
    • .indexOf() in JS
    %%js
console.log("Hello Brawler".indexOf("Brawler"));

    <IPython.core.display.Javascript object>

    Replacing Substrings

    • Can replace different parts of a string with something else
    • .replace() in Python and JS
    %%js
console.log("Hello Brawler".replace("Brawler", "Mihir"));

    <IPython.core.display.Javascript object>

    Splitting Strings

    • Splits a string into a list of substrings based on a delimiter (most commonly a space or comma)
    • .split() in Python and JS
    %%js
console.log("Darryl,Mico,Fang".split(","));

    <IPython.core.display.Javascript object>

    Joining Strings

    • Basically opposite of splitting strings
    • .join() in Python and JS
    %%js
console.log(['Darryl', 'Mico', 'Fang'].join(","));


    <IPython.core.display.Javascript object>

    Sample Hack - String Analyzation

    • Determine metrics about strings (length, chars, palidrome(?), etc.)
    %%js
const string1 = "Brawl Stars is a fun game!";
const string2 = "Star Brawl war Brats";


console.log("String 1: " + string1);
const length1 = string1.length;
console.log("Length: " + length1);


function countVowels(inputString) {
    const vowels = 'aeiouAEIOU';
    let count = 0;
    for (const char of inputString) {
        if (vowels.includes(char)) {
            count++;
        }
    }
    return count;
}


console.log("Vowel Count: " + countVowels(string1));


function averageWordLength(inputString) {
    const words = inputString.split(/\s+/);
    if (words.length === 0) {
        return 0;
    }
    const totalLength = words.reduce((sum, word) => sum + word.length, 0);
    return totalLength / words.length;
}


console.log("Average Word Length: " + averageWordLength(string1));


function isPalindrome(inputString) {
    const sanitizedString = inputString.replace(/\s+/g, '').toLowerCase();
    return sanitizedString === sanitizedString.split('').reverse().join('');
}


console.log("Palindrome or Not? " + isPalindrome(string1));
console.log("String 2: " + string2);
const length2 = string2.length;
console.log("Length: " + length2);
console.log("Vowel Count: " + countVowels(string2));
console.log("Average Word Length: " + averageWordLength(string2));
console.log("Palindrome or Not? " + isPalindrome(string2));

    <IPython.core.display.Javascript object>