You need to define a runtime field complete_name that joins first_name and last_name with a comma and space (", "). Which painless script correctly implements this?
hard🚀 Application Q8 of Q15
Elasticsearch - Advanced Patterns
You need to define a runtime field complete_name that joins first_name and last_name with a comma and space (", "). Which painless script correctly implements this?
The runtime field complete_name must concatenate first_name and last_name separated by a comma and a space.
Step 2: Analyze each option
"source": "emit(doc['first_name'].value + ', ' + doc['last_name'].value)" concatenates first_name + ', ' + last_name, which matches the requirement. "source": "emit(doc['first_name'].value + ' ' + doc['last_name'].value)" uses a space instead of a comma and space. "source": "emit(doc['last_name'].value + ', ' + doc['first_name'].value)" reverses the order. "source": "emit(doc['first_name'].value + '-' + doc['last_name'].value)" uses a hyphen instead of a comma and space.
Final Answer:
"source": "emit(doc['first_name'].value + ', ' + doc['last_name'].value)" correctly concatenates with a comma and space.
Quick Check:
Check the separator used between names [OK]
Quick Trick:Check string concatenation and separator carefully [OK]
Common Mistakes:
MISTAKES
Using wrong separator between fields
Reversing the order of concatenation
Forgetting to add space after comma
Master "Advanced Patterns" in Elasticsearch
9 interactive learning modes - each teaches the same concept differently
