leifw

I had some naive notions about how JavaScript evaluated certain Boolean expressions. For example, I assumed that code like

if (x) { ... }

would always evaluate like

if (x == true) { ... }

I was wrong. For example,

if ([]) { ... }

evaluates to true, but

if ([] == true) { ... }

evaluates to false.

I wrote the following test to help me identify other perilous JavaScript irregularities.
Read the squares as:

if (y)
    green
else
    red

Labels: javascript