How to Javascript String toUpperCase in Bash

The JavaScript String toUpperCase() function is a built-in method that converts all the characters in a string to uppercase letters. It returns a new string with all the alphabetic characters in uppercase format. This function is useful when you want to standardize the case of a string for comparison or display purposes. The toUpperCase() function does not modify the original string, but instead creates a new string with the uppercase characters. It can be called on any string variable or string literal and takes no arguments. Keep reading below to learn how to Javascript String toUpperCase in Bash.

Looking to get a head start on your next software interview? Pickup a copy of the best book to prepare: Cracking The Coding Interview!

Buy Now On Amazon

Javascript String toUpperCase in Bash With Example Code

JavaScript’s `toUpperCase()` method is a useful tool for converting strings to all uppercase letters. But what if you need to use this method in a Bash script? Fortunately, there is a way to achieve this using the `tr` command.

The `tr` command is used to translate or delete characters in a string. By using the `-d` option, we can delete all lowercase letters from a string, effectively converting it to uppercase. Here’s an example:

echo "hello world" | tr '[:lower:]' '[:upper:]'

This command will output “HELLO WORLD”. Let’s break it down:

– `echo “hello world”` prints the string “hello world” to the console.
– `|` is a pipe, which takes the output of the previous command and passes it as input to the next command.
– `tr ‘[:lower:]’ ‘[:upper:]’` translates all lowercase letters to uppercase letters.

You can also use this method to convert a variable to uppercase:

myString="hello world" myString=$(echo $myString | tr '[:lower:]' '[:upper:]') echo $myString

This will output “HELLO WORLD”. Here’s what’s happening:

– `myString=”hello world”` sets the variable `myString` to the string “hello world”.
– `myString=$(echo $myString | tr ‘[:lower:]’ ‘[:upper:]’)` sets `myString` to the output of the `echo` command piped into the `tr` command, which converts all lowercase letters to uppercase letters.
– `echo $myString` prints the value of `myString` to the console.

In conclusion, while Bash doesn’t have a built-in `toUpperCase()` method like JavaScript, we can use the `tr` command to achieve the same result.

Equivalent of Javascript String toUpperCase in Bash

In conclusion, the Bash shell provides a useful and powerful set of tools for working with strings. One of these tools is the “tr” command, which can be used to convert all characters in a string to uppercase. While this is not exactly equivalent to the JavaScript String toUpperCase function, it provides a similar functionality that can be very useful in certain situations. By understanding how to use the “tr” command in Bash, developers can more effectively work with strings and create more robust and efficient scripts. So, if you’re looking to convert strings to uppercase in Bash, the “tr” command is definitely worth exploring.