Careful Quote by Douglas Crockford
“It turns out that strong typing does not eliminate the need for careful testing. And I have found in my work that the sorts of errors that strong type checking finds are no the errors I worry about.”
About This Quote
Source Interview: JavaScript: The Good Parts, 2008
Strong typing reduces certain bugs but cannot replace thorough testing; many critical errors stem from logic and design.
In simple terms: Types help but testing still needed.
Key Takeaway
Test regardless of type system.
Themes
software development
quality assurance
type systems
Mood
pragmatic
analytical
Type
technical
reflective
When to use this quote
- web development
- API design
- refactoring
- bug fixing
Key Concepts
static typing
runtime errors
test coverage
Questions to Reflect On
- How do you balance type safety with testing?
- What bugs have you missed despite strong types?
A Different Perspective
Strong typing may give false confidence, leading to overlooked edge cases.
![“suppress empty strings in the output array when the separator is a regular expression: var f = '|a|b|c|'.split(/\|/); // f is ['a', 'b', 'c'] on some systems, and // f is ['', 'a', 'b', 'c', ''] on others string.substring(start, end ) The substring method is the same as the slice method except…” quote by Douglas Crockford](https://sms4smile.com/quotes/img-quotes/566/douglas-crockford-19095_productivity_suppress-empty-strings-in-the-output-arr_751466.jpg)
![“[A]s you partake of the world's bill of fare, that's darned good advice to follow. Do a lot of spitting out the hot air. And be careful what you swallow.” quote by Dr. Seuss](https://sms4smile.com/quotes/img-quotes/da8/dr-seuss-1224_advice_a-s-you-partake-of-the-world-s-bill-of-f_6806.jpg)
