Simplify duplicated function call inside if-else statement

If-statements can contain duplicated statements with minimal differences. For example, copy-paste changes can result in such code duplication. The duplication can often be simplified by extracting the difference using the conditional operator and reducing the if-else to the deduplicated statement.

Before

if (direction === "left") {
  move(original.x, -10);
} else {
  move(original.x, 10);
}

Refactoring Steps

1. Extract variable twice with the same variable name
2. Split declaration and initialization of both extracted constants
3. Move duplicated first statement out of if-else
4. Move duplicated last statement out of if-else
5. Convert the if-else statement into a conditional expression
6. Merge variable declaration and initialization
7. Inline variable

After

move(original.x, direction === "left" ? -10 : 10);