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// JavaScript 1.7 stuff
// From snippets in
// https://developer.mozilla.org/en/New_in_JavaScript_1.7
// Generators
function fib() {
var i = 0, j = 1;
while (true) {
yield i;
var t = i;
i = j;
j += t;
}
}
var g = fib();
for (var i = 0; i < 10; i++) {
document.write(g.next() + "<br>\n");
}
var obj = {name:"Jack Bauer", username:"JackB", id:12345, agency:"CTU",
region:"Los Angeles"};
var it = Iterator(obj);
try {
while (true) {
print(it.next() + "\n");
}
} catch (err if err instanceof StopIteration) {
print("End of record.\n");
} catch (err) {
print("Unknown error: " + err.description + "\n");
}
// Array Comprehensions
function range(begin, end) {
for (let i = begin; i < end; ++i) {
yield i;
}
}
var ten_squares = [i * i for each (i in range(0, 10))];
var evens = [i for each (i in range(0, 21)) if (i % 2 == 0)];
// Blockscope with Let
var x = 5;
var y = 0;
let (x = x+10, y = 12) {
print(x+y + "\n");
}
print((x + y) + "\n");
var x1 = 5;
var y1 = 0;
document.write( let(x1 = x1 + 10, y1 = 12) x1+y1 + "<br>\n");
document.write(x1+y1 + "<br>\n");
if (x > y) {
let gamma = 12.7 + y;
i = gamma * x;
}
// Let in for loop
var i=0;
for ( let i=i ; i < 10 ; i++ )
document.write(i + "<br>\n");
for ( let [name,value] in obj )
document.write("Name: " + name + ", Value: " + value + "<br>\n");
// Destructuring assignment
function destr() {
var a = 1;
var b = 3;
[a, b] = [b, a];
}
function destr2() {
var a = 'o';
var b = "<span style='color:green;'>o</span>";
var c = 'o';
var d = 'o';
var e = 'o';
var f = "<span style='color:blue;'>o</span>";
var g = 'o';
var h = 'o';
for (lp=0;lp<40;lp++)
{[a, b, c, d, e, f, g, h] = [b, c, d, e, f, g, h, a];
document.write(a+''+b+''+c+''+d+''+e+''+f+''+g+''+h+''+"<br />");}
}
function f() {
return [1, 2];
}
function callf() {
var a, b;
[a, b] = f();
document.write ("A is " + a + " B is " + b + "<br>\n");
}
// Looping across objects
let obj = { width: 3, length: 1.5, color: "orange" };
for (let [name, value] in Iterator(obj)) {
document.write ("Name: " + name + ", Value: " + value + "<br>\n");
}
// This is not working yet:
/*
var people = [
{
name: "Mike Smith",
family: {
mother: "Jane Smith",
father: "Harry Smith",
sister: "Samantha Smith"
},
age: 35
},
{
name: "Tom Jones",
family: {
mother: "Norah Jones",
father: "Richard Jones",
brother: "Howard Jones"
},
age: 25
}
];
for each (let {name: n, family: { father: f } } in people) {
document.write ("Name: " + n + ", Father: " + f + "<br>\n");
}
*/
// Ignoring some return values
function f() {
return [1, 2, 3];
}
var [a, , b] = f();
document.write ("A is " + a + " B is " + b + "<br>\n");
function testexpr() {
// Simple regular expression to match http / https / ftp-style URLs.
var parsedURL = /^(\w+)\:\/\/([^\/]+)\/(.*)$/.exec(url);
if (!parsedURL)
return null;
var [, protocol, fullhost, fullpath] = parsedURL;
}
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