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It’s possible to be too helpful

July 1, 2011

I think this may be the best JavaScript error I’ve ever been given: Uncaught TypeError: Object [object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object [...]

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JavaScript modulus weirdness

April 27, 2011

I just became aware of an interesting JavaScript ‘feature’. The code y = x % 1; is equivalent to y = x – Math.floor(x); because ECMA-262 says: … the floating-point remainder r from a dividend n and a divisor d is defined by the mathematical relation r = n − (d * q) where q [...]

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JavaScript: When is a function not a function?

October 14, 2010

Something that often confuses people new to JavaScript is the use of the function keyword. That’s because it represents two completely different operations, both called function. First of all, there’s the lambda operator “function”. It works exactly like (lambda) in Scheme, {|| } in Ruby, or λ in lambda calculus. That is, it binds one [...]

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Top 25 most dangerous programming errors

January 12, 2009

The SANS Institute has published a list of the Top 25 Most Dangerous Programming Errors. The list itself contains all the usual suspects–buffer overflows, SQL injection, relying on client code to perform data validation, and various other classics. If any of the items on the list strike you as surprising, you probably shouldn’t be writing [...]

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JavaScript: The Good Parts

August 9, 2008

A review of O’Reilly’s “JavaScript: The Good Parts” by Douglas Crockford

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