[Solved] Find the mistake in this Ruby method using a guard clause:def validate(input) return "Empty input" if input = "" "Input is valid" end | Ruby

Ruby - Control Flow

Find the mistake in this Ruby method using a guard clause:

def validate(input)
  return "Empty input" if input = ""
  "Input is valid"
end

AMissing parentheses around the condition in the guard clause

BUsing assignment '=' instead of comparison '==' in the guard clause

CThe guard clause should return nil instead of a string

DThe method should use 'unless' instead of 'if'

Step-by-Step Solution

Solution:

Step 1: Review guard clause syntax
The guard clause condition should use comparison operators to check values.
Step 2: Identify error
The code uses = which is assignment, not comparison. It should be == to compare input with an empty string.
Final Answer:
Using assignment '=' instead of comparison '==' in the guard clause -> Option B
Quick Check:
Use '==' for comparisons, not '=' [OK]

Quick Trick: Use '==' for comparisons in guard clauses [OK]

Common Mistakes:

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