Environment variables should be properly validated with correct type checking and without redundant conditions. Common issues include comparing strings to integers and using unnecessary double-checks that can lead to unexpected behavior.
Key principles:
Examples of issues and fixes:
❌ Problematic patterns:
# Redundant checking
if ENV["RCT_USE_PREBUILT_RNCORE"] && ENV["RCT_USE_PREBUILT_RNCORE"] == "1"
# Type mismatch - comparing string to integer
return ENV["RCT_NEW_ARCH_ENABLED"] == 0 ? false : true
✅ Improved patterns:
# Direct value check
if ENV["RCT_USE_PREBUILT_RNCORE"] == "1"
# Correct string comparison with simplified logic
return ENV["RCT_NEW_ARCH_ENABLED"] != "0"
This approach prevents runtime errors, improves code readability, and ensures consistent behavior across different environments and deployment scenarios.
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