How to select all instances of a variable and edit variable name in Sublime

Here are the specific steps:

1. Open the file: First, open the file containing the target variable.

2. Select the variable name: Place the cursor on the variable name you want to edit.

3. Select all instances:

   • Mac: Press Command + D multiple times; Sublime Text will select the next matching instance sequentially. To select all matching instances at once, use Command + Ctrl + G.

   • Windows/Linux: Similarly, use Ctrl + D to add the next matching instance to the selection. To select all matching instances at once, use Alt + F3.

4. Edit the variable name: Once all desired instances are selected, begin typing the new variable name. The input will replace all selected instances simultaneously.

5. Save the file: After completing the edits, save the file to ensure the changes are applied.

For example, suppose you have a variable name called oldVariableName widely used in a JavaScript file, and you need to change it to newVariableName. Simply place the cursor on any oldVariableName, use Ctrl + D (Windows/Linux) or Command + D (Mac) to select all instances, then type newVariableName; all occurrences of oldVariableName will be updated.

This method is particularly effective, especially when working with large files or during code refactoring, significantly improving efficiency and accuracy.