大约有 13,700 项符合查询结果（耗时：0.0318秒） [XML]
Why can't I make a vector of references?
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Checking the assignable concept at boost.org/doc/libs/1_39_0/doc/html/Assignable.html all operations except the swap are valid on references.
– amit
Aug 18 '09 at 16:01
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How to upload a file to directory in S3 bucket using boto
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import boto
import boto.s3
import sys
from boto.s3.key import Key
AWS_ACCESS_KEY_ID = ''
AWS_SECRET_ACCESS_KEY = ''
bucket_name = AWS_ACCESS_KEY_ID.lower() + '-dump'
conn = boto.connect_s3(AWS_ACCESS_KEY_ID,
AWS_SECRET_ACCESS_KEY)
bucket = conn.create_bucket(bucket_name,
locatio...
How do I set up a simple delegate to communicate between two view controllers?
... super.viewDidLoad()
}
@IBAction func btnSendDataPushed(_ sender: UIButton) {
// Call the delegate method from SecondVC
self.delegate?.sendData(data:self.data)
dismiss(animated: true, completion: nil)
}
}
ViewCo...
How to find third or nth maximum salary from salary table?
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Use ROW_NUMBER(if you want a single) or DENSE_RANK(for all related rows):
WITH CTE AS
(
SELECT EmpID, EmpName, EmpSalary,
RN = ROW_NUMBER() OVER (ORDER BY EmpSalary DESC)
FROM dbo.Salary
)
SELECT EmpID, EmpName, ...
App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...以参考我摘录的官方的一个说明：http://blog.sina.com.cn/s/blog_66fa66650102w7is.html以及我在实施地图调用过程中的一些记录说明：http://blog.sina.com.cn/s/blog_66fa66650102wwfl.html（3）调用高德地图：
高德地图的uri参考地址：http://lbs.amap.com/api/u...
How do I execute any command editing its file (argument) “in place” using bash?
...iting it out. For example, with perl:
uniq temp.txt | perl -e 'undef $/; $_ = <>; open(OUT,">temp.txt"); print OUT;'
Here, the perl part reads the complete output from uniq in variable $_ and then overwrites the original file with this data. You could do the same in the scripting languag...
Parsing a string into a boolean value in PHP
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There is a native PHP method of doing this which uses PHP's filter_var method:
$bool = filter_var($value, FILTER_VALIDATE_BOOLEAN);
According to PHP's manual:
Returns TRUE for "1", "true", "on" and "yes". Returns FALSE otherwise.
If FILTER_NULL_ON_FAILURE is set, FALSE is return...
Better way to sum a property value in an array
...y.prototype.sum = function (prop) {
var total = 0
for ( var i = 0, _len = this.length; i < _len; i++ ) {
total += this[i][prop]
}
return total
}
console.log(traveler.sum("Amount"))
The Fiddle: http://jsfiddle.net/9BAmj/
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max value of integer
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The C standard also specifies minimum values for INT_MAX, LONG_MAX, etc.
– Oliver Charlesworth
Feb 21 '13 at 14:51
13
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Embedded MongoDB when running integration tests
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public class EmbeddedMongoTest
{
private static final String DATABASE_NAME = "embedded";
private MongodExecutable mongodExe;
private MongodProcess mongod;
private MongoClient mongo;
@Before
public void beforeEach() throws Exception {
MongodStarter starter = Mongod...