大约有 40,000 项符合查询结果（耗时：0.0428秒） [XML]
New Array from Index Range Swift
...gt; but is of type ArraySlice<Int>. That's because Array's subscript(_:) returns an ArraySlice<Element> that, according to Apple, presents a view onto the storage of some larger array.
Besides, Swift also provides Array an initializer called init(_:) that allows us to create a new...
Programmatically retrieve memory usage on iPhone
...icture of usage over-all.
#import <mach/mach.h>
// ...
void report_memory(void) {
struct task_basic_info info;
mach_msg_type_number_t size = TASK_BASIC_INFO_COUNT;
kern_return_t kerr = task_info(mach_task_self(),
TASK_BASIC_INFO,
...
Get the latest record from mongodb collection
...answered Feb 2 '14 at 21:28
dark_rubydark_ruby
6,00644 gold badges2626 silver badges5050 bronze badges
...
How to concatenate properties from multiple JavaScript objects
...
Underscore has few methods to do this;
1. _.extend(destination, *sources)
Copy all of the properties in the source objects over to the destination object, and return the destination object.
_.extend(a, _.extend(b, c));
=> {"one" : 1, "two" : 2, "three" : 3, "fo...
How to convert a java.util.List to a Scala list
...
import scala.collection.JavaConversions._
will do implicit conversion for you; e.g.:
var list = new java.util.ArrayList[Int](1,2,3)
list.foreach{println}
share
|
...
How do you get the logical xor of two variables in Python?
...nt to bitwise xor when the domain is restricted to 0 and 1.
So the logical_xor function would be implemented like:
def logical_xor(str1, str2):
return bool(str1) ^ bool(str2)
Credit to Nick Coghlan on the Python-3000 mailing list.
...
JavaScript hashmap equivalent
...ache the hash value in the object itself (for example, in a property named __hash).
A hash function which does this is and works for both primitive values and objects is:
function hash(value) {
return (typeof value) + ' ' + (value instanceof Object ?
(value.__hash || (value.__hash = ++ar...
How to count the number of set bits in a 32-bit integer?
... may need to adjust it to work for a particular language (e.g. using uint32_t for C++ and >>> in Java):
int numberOfSetBits(uint32_t i)
{
// Java: use int, and use >>> instead of >>
// C or C++: use uint32_t
i = i - ((i >> 1) & 0x55555555);
i = (...
How do I remove a property from a JavaScript object?
...
Another alternative is to use the Underscore.js library.
Note that _.pick() and _.omit() both return a copy of the object and don't directly modify the original object. Assigning the result to the original object should do the trick (not shown).
Reference: link _.pick(object, *keys)
Return...
How do you write tests for the argparse portion of a python module? [closed]
...ou should refactor your code and move the parsing to a function:
def parse_args(args):
parser = argparse.ArgumentParser(...)
parser.add_argument...
# ...Create your parser as you like...
return parser.parse_args(args)
Then in your main function you should just call it with:
parse...