Lint-UselessNumericOperation.md

Pattern: Unnecessary numeric operation

Issue: -

Description

Certain numeric operations have no impact, being: Adding or subtracting 0, multiplying or dividing by 1 or raising to the power of 1. These are probably leftover from debugging, or are mistakes.

Examples

# bad
x + 0
x - 0
x * 1
x / 1
x ** 1

# good
x

# bad
x += 0
x -= 0
x *= 1
x /= 1
x **= 1

# good
x = x

Further Reading

• RuboCop - Lint/UselessNumericOperation