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How to define optional methods in Swift protocol?
...Swift 2.0.
– Entalpi
Sep 3 '15 at 8:32
14
@MattQuiros I'm finding that you do in fact need to dec...
Why does i = i + i give me 0?
...
The issue is due to integer overflow.
In 32-bit twos-complement arithmetic:
i does indeed start out having power-of-two values, but then overflow behaviors start once you get to 230:
230 + 230 = -231
-231 + -231 = 0
...in int arithmetic, since it's essentially ari...
When is the @JsonProperty property used and what is it used for?
...ect. Suppose there is an object:
public class Parameter {
public String _name;
public String _value;
}
The serialization of this object is:
{
"_name": "...",
"_value": "..."
}
The name of variable is directly used to serialize data. If you are about to remove system api from system im...
Unable to install Maven on Windows: “JAVA_HOME is set to an invalid directory”
...e-maven-2.2.0\bin" is on your command search path.
Make sure that the JAVA_HOME variable refers to the home directory for your Java installation. If you are executing Java from "E:\Sun\SDK\jdk\bin", then the JAVA_HOME variable needs to point to "E:\Sun\SDK\jdk".
NB: JAVA_HOME should NOT end with "...
Fancybox doesn't work with jQuery v1.9.0 [ f.browser is undefined / Cannot read property 'msie' ]
....10.2.html
– Anders
Feb 28 '14 at 8:32
1
...
What is the definition of “interface” in object oriented programming
...dom.randint(0,10)
# What you care about
class SecretGame(object):
def __init__(self, number_generator):
number = number_generator.generate()
print number
Here, none of the classes implement an interface. Python does not care about that, because the SecretGame class will just t...
How and where are Annotations used in Java?
...|
edited Jan 30 '18 at 21:32
David Gelhar
27.3k33 gold badges6464 silver badges8181 bronze badges
answer...
Easy way to print Perl array? (with a little formatting)
...
32
You can use Data::Dump:
use Data::Dump qw(dump);
my @a = (1, [2, 3], {4 => 5});
dump(@a);
...
从Code Review 谈如何做技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...PI和年终奖based on how many works I’ve done！而不是How perfect they are ! 这让我想到那些天天在用Spring MVC 做CRUD网页的工程师，我承认，他们很熟练。大量的重复劳动。其实，仔细想一下好多东西是可以框架化，模板化，或是自动生...
AWS S3 copy files and folders between two buckets
...
A simplified example using the aws-sdk gem:
AWS.config(:access_key_id => '...', :secret_access_key => '...')
s3 = AWS::S3.new
s3.buckets['bucket-name'].objects['source-key'].copy_to('target-key')
If you want to perform the copy between different buckets, then specify the target ...