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How is null + true a string?
...er user-defined operators available on unmentioned types. For example:
// Foo defined Foo operator+(Foo foo, bool b)
Foo f = null;
Foo g = f + true;
That's fine, but it's not used for a null literal, because the compiler doesn't know to look in Foo. It only knows to consider string because it's a...
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...
Difference between a Structure and a Union
... enum indicating the type of value and a union to store that value.
union foo {
int a; // can't use both a and b at once
char b;
} foo;
struct bar {
int a; // can use both a and b simultaneously
char b;
} bar;
union foo x;
x.a = 3; // OK
x.b = 'c'; // NO! this affects the value of x.a...
How to add elements of a Java8 stream into an existing List
...ample:
List<String> destList = new ArrayList<>(Arrays.asList("foo"));
List<String> newList = Arrays.asList("0", "1", "2", "3", "4", "5");
newList.parallelStream()
.collect(Collectors.toCollection(() -> destList));
System.out.println(destList);
When I run this program, ...
+ 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...
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...
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
...
In Python, how to display current time in readable format
How can I display the current time as:
6 Answers
6
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