Chapter 2. Strings

Fish Shell Chapter 2.
Strings

Capitalizing a string

In Fish Shell, strings can be manipulated directly with built-in functions, without the need for external tools or libraries.

Concatenating strings

In Fish, slap strings together with spaces between or use string join.

Converting a string to lower case

Using the string command, converting text to lower case is straightforward.

Deleting characters matching a pattern

In Fish Shell, the magic happens with the string utility, a handy built-in tool for string operations - introduced in version 2.3.0.

Extracting substrings

In Fish, you use string command to manipulate strings.

Finding the length of a string

Here’s how to get a string’s length in Fish.

Interpolating a string

In Fish, you use double quotes and place the variable or command you want to interpolate with a dollar sign $ straight in the string.

Removing quotes from a string

Fish has built-in magic for this kind of task.

Searching and replacing text

Let’s change all instances of ‘cat’ to ‘dog’ in a string.

Using regular expressions

While Fish Shell itself does not have a built-in command for regex, it effectively uses external commands like grep, sed, and awk that support regex, allowing you to incorporate regex operations in your scripts.