How to Capitalize a String in JavaScript | Learn JavaScript & Algorithms
How to capitalize a string in javascript? Capitalizing a String is a good algorithmic challenge to solve using JavaScript. Challenge is to write a function that accepts a string. The function should capitalize the first letter of each word in the string then return the capitalized string.
We can use for loop to do this in JavaScript. To do that define a function called capitalize that takes a single argument, a string. Initializes a variable called result with the first character of the input string, capitalized using the toUpperCase method. Use a for loop to iterate through the rest of the characters in the string, starting at the second character. Within the loop, check if the character before the current character is a space. If it is, add the current character to the result variable, capitalized using the toUpperCase method. If the character before the current character is not a space, add the current character to the result variable without modification. Return the modified string stored in the result variable. Call the function with an input string that will generate the desired output.
We can also use for of loop to do the same in JavaScript. Define a function called capitalize that takes a single argument, a string. Initializes a variable called words as an empty array. Start for of loop and use the split method to split the input string into an array of substrings, with each element being a word in the original string, separated by a space. Iterate through the array of substrings.
Within the loop, capitalizes the first letter of each word using toUpperCase and concatenate it with the rest of the letters of the word using slice method. Pushed the resulting word to the words array. Use the join method to join all the elements in the words array into a single string, separated by spaces, and return the capitalized string. Call the function with an input string that will return the modified output string.
And this is how we capitalize a string in JavaScript using for loop and for of loop easily.
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It can be a good javascript interview question or frontend interview question. You may not be required to solve it on paper or whiteboard but the interviewer may ask you to give an idea on how to approach this algorithm. If you have an understanding of how to solve this problem or approach this algorithm, you will be able to answer it and get your next job as a frontend developer or full-stack developer.
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