筆記與流年

Based on some great feedback to my article about JavaScript's treatment of the this keyword, I've decided to have a stab at explaining two other often misunderstood JavaScript language features: call() and apply(). Here goes.

Debouncing means to coalesce several temporally close signals into one signal. For example, your computer keyboard does this. Every time you hit a key, the contacts actually bounce a few times, causing several signals to be sent to the circuitry. The circuitry determines that the bouncing has ended when no bounces are detected within a certain period (the “detection period”).

Cufón and Typeface.js are both methods to show text in custom fonts (like sIFR), are both only a couple of months old and both use canvas or VML. So what’s the difference? And which one is better?