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Preloading images with jQuery
... } (new Image(), pictureUrls[i]));
}
};
preloadPictures(['http://foo/picture.bar', 'http://foo/picture.bar', 'http://foo/picture.bar', 'http://foo/picture.bar'], function(){
console.log('a');
});
preloadPictures(['http://foo/picture.bar', 'http://foo/picture.bar', 'http://foo/picture....
How do I create a variable number of variables?
...
'eggs'
For cases where you're thinking of doing something like
var1 = 'foo'
var2 = 'bar'
var3 = 'baz'
...
a list may be more appropriate than a dict. A list represents an ordered sequence of objects, with integer indices:
lst = ['foo', 'bar', 'baz']
print(lst[1]) # prints bar, becau...
Why exactly is eval evil?
... problems
To explain the last point with a simplified example:
(defmacro foo (a b)
(list (if (eql a 3) 'sin 'cos) b))
So, I may want to write a macro that based on the first parameter uses either SIN or COS.
(foo 3 4) does (sin 4) and (foo 1 4) does (cos 4).
Now we may have:
(foo (+ 2 1) 4)
Th...
What's the difference between URI.escape and CGI.escape?
...that it could not handle the RFC-3896 spec.
URI.escape 'http://google.com/foo?bar=at#anchor&title=My Blog & Your Blog'
# => "http://google.com/foo?bar=at%23anchor&title=My%20Blog%20&%20Your%20Blog"
URI.escape was marked as obsolete:
Moreover current URI.encode is simple gs...
+ operator for array in PHP?
...ray will be ignored.
So if you do
$array1 = ['one', 'two', 'foo' => 'bar'];
$array2 = ['three', 'four', 'five', 'foo' => 'baz'];
print_r($array1 + $array2);
You will get
Array
(
[0] => one // preserved from $array1 (left-hand array)
[1] => two // preserved...
Clone() vs Copy constructor- which is recommended in java [duplicate]
...l from
unexpectedly backfiring
Prefer a method that copies the object
Foo copyFoo (Foo foo){
Foo f = new Foo();
//for all properties in FOo
f.set(foo.get());
return f;
}
Read more
http://adtmag.com/articles/2000/01/18/effective-javaeffective-cloning.aspx
...
Is R's apply family more than syntactic sugar?
...y, but you also specify the return value type which makes it much faster.
foo <- function(x) x+1
y <- numeric(1e6)
system.time({z <- numeric(1e6); for(i in y) z[i] <- foo(i)})
# user system elapsed
# 3.54 0.00 3.53
system.time(z <- lapply(y, foo))
# user system elaps...
Why do C and C++ compilers allow array lengths in function signatures when they're never enforced?
...true but it is also possible to pass an array of just that size using void foo(int (*somearray)[20]) syntax. in this case 20 is enforced on the caller sites.
– v.oddou
Mar 28 '14 at 3:11
...
What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?
...uct.
The concrete behavioural differences between them include:
rescue Foo will rescue instances of Foo including subclasses of Foo. catch(foo) will only catch the same object, Foo. Not only can you not pass catch a class name to catch instances of it, but it won't even do equality comparisons. ...
Populating Spring @Value during Unit Test
...e
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = FooTest.Config.class)
@TestPropertySource(properties = {
"some.bar.value=testValue",
})
public class FooTest {
@Value("${some.bar.value}")
String bar;
@Test
public void testValueSetup() {
assertEquals("testV...