大约有 44,000 项符合查询结果（耗时：0.0499秒） [XML]
How to query nested objects?
....find( { headers : { From: "reservations@marriott.com" } } )
This queries for documents where headers equals { From: ... }, i.e. contains no other fields.
db.messages.find( { 'headers.From': "reservations@marriott.com" } )
This only looks at the headers.From field, not affected by other fields...
Why is Spring's ApplicationContext.getBean considered bad?
... Control! While it's still easy to change what implemenation is configured for the given bean name, the class now relies directly on Spring to provide that dependency and can't get it any other way. You can't just make your own mock implementation in a test class and pass that to it yourself. This b...
LINQ query to select top five
...ems
where t.DeliverySelection == true && t.Delivery.SentForDelivery == null
orderby t.Delivery.SubmissionDate
select t).Take(5);
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Node.js on multi-core machines
...'t yet realize just how insanely hard it is to debug multi-threaded code. For a deeper explanation of the Node.js process model and why it works this way (and why it will NEVER support multiple threads), read my other post.
So how do I take advantage of my 16 core box?
Two ways:
For big heavy c...
Case insensitive comparison NSString
...Compare:@"some string"] == NSOrderedSame ) {
// strings are equal except for possibly case
}
The documentation is located at Search and Comparison Methods
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Where are my postgres *.conf files?
...
Ubuntu 13.04 installed using software centre :
The location for mine is:
/etc/postgresql/9.1/main/postgresql.conf
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ios Upload Image and Text using HTTP POST
Thanks for reading.
10 Answers
10
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Why does javascript replace only first instance when using replace? [duplicate]
...ce all matches in one go.
If you want a real string-based replace — for example because the match-string is dynamic and might contain characters that have a special meaning in regexen — the JavaScript idiom for that is:
var id= 'c_'+date.split('/').join('');
...
How do I add a newline to a TextView in Android?
...the above, did some research of my own resulting in the following solution for rendering line feed escape chars:
string = string.replace("\\\n", System.getProperty("line.separator"));
Using the replace method you need to filter escaped linefeeds (e.g. '\\\n')
Only then each instance of line feed...
What does `unsigned` in MySQL mean and when to use it?
...tive numbers in a column
or when you need a larger upper
numeric range for the column. For
example, if an INT column is UNSIGNED,
the size of the column's range is the
same but its endpoints shift from
-2147483648 and 2147483647 up to 0 and 4294967295.
When do I use it ?
Ask yourself...