Exercises
Write a function that converts a hexadecimal color, for example blue
"#0000FF", into its RGB representation "rgb(0, 0, 255)". Name your functiongetRGB()and test it with this code:>>> var a = getRGB("#00FF00"); >>> a;"rgb(0, 255, 0)"
What does each of these lines print in the console?
>>> parseInt(1e1) >>> parseInt('1e1') >>> parseFloat('1e1') >>> isFinite(0/10) >>> isFinite(20/0) >>> isNaN(parseInt(NaN));What does this following code
alert()?var a = 1; function f() { var a = 2; function n() { alert(a); } n(); } f();All these examples alert "Boo!". Can you explain why?
4.1.
var f = alert; eval('f("Boo!")');4.2.
var e; var f = alert; eval('e=f')('Boo!');4.3.
( function(){ return alert; } )()('Boo!');