Which of the following is the correct syntax to update hash a with hash b in Ruby?

easy📝 Syntax Q12 of 15

Ruby - Hashes

Which of the following is the correct syntax to update hash a with hash b in Ruby?

a = {x: 1}

b = {y: 2}

A<code>a + b</code>

B<code>a.merge!b</code>

C<code>a.merge b</code>

D<code>a.update(b)</code>

Step-by-Step Solution

Solution:

Step 1: Check syntax for updating hash
update is a method that modifies the original hash and takes another hash as argument with parentheses.
Step 2: Compare with other options
merge! also updates but usually called with ! and parentheses are optional but update(b) is the most explicit and correct syntax here.
Final Answer:
a.update(b) -> Option D
Quick Check:
Use update() to modify original hash [OK]

Quick Trick: Use update(hash) to change original hash [OK]

Common Mistakes:

MISTAKES

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