大约有 40,000 项符合查询结果(耗时:0.0669秒) [XML]

https://stackoverflow.com/ques... 

Get specific object by id from array of objects in AngularJS

...by id, the result is an array // so we select the element 0 single_object = $filter('filter')(foo.results, function (d) {return d.id === 2;})[0]; // If you want to see the result, just check the log console.log(single_object); }]); Plunker: http://plnkr.co/edit/5E7FYqNNqDuqFBlyDq...
https://stackoverflow.com/ques... 

How do I monitor the computer's CPU, memory, and disk usage in Java?

... = 390625000 is only how long that thread has been running. That is not really useful for determining the processor usage – MikeNereson Jul 14 '09 at 15:35 2 ...
https://stackoverflow.com/ques... 

JSON Stringify changes time of date because of UTC

... thanks... I actually found a great library here, blog.stevenlevithan.com/archives/date-time-format all you need to do this (maybe it will help you) , you pass false and it doesn't convert. var something = dateFormat(myStartDate, "isoDateTi...
https://stackoverflow.com/ques... 

data.table vs dplyr: can one do something well the other can't or does poorly?

...j and by together is by design. By keeping related operations together, it allows to easily optimise operations for speed and more importantly memory usage, and also provide some powerful features, all while maintaining the consistency in syntax. 1. Speed Quite a few benchmarks (though mostly on g...
https://stackoverflow.com/ques... 

write a shell script to ssh to a remote machine and execute commands

...ame hostname "pwd; ls" This will disable the host key check and automatically add the host key to the list of known hosts. If you do not want to have the host added to the known hosts file, add the option -o UserKnownHostsFile=/dev/null. Note that this disables certain security checks, for exampl...
https://stackoverflow.com/ques... 

Int or Number DataType for DataAnnotation validation attribute

On my MVC3 project, I store score prediction for football/soccer/hockey/... sport game. So one of properties of my prediction class looks like this: ...
https://stackoverflow.com/ques... 

How to implement has_many :through relationships with Mongoid and mongodb?

...uire multiple queries. https://github.com/mongoid/mongoid/issues/544 Normally if you have a many-many relationship in a RDBMS you would model that differently in MongoDB using a field containing an array of 'foreign' keys on either side. For example: class Physician include Mongoid::Document ...
https://stackoverflow.com/ques... 

Proper way to exit iPhone application?

... it to exit due to certain user actions. After cleaning up memory the app allocated, what's the appropriate method to call to terminate the application? ...
https://stackoverflow.com/ques... 

Detect whether there is an Internet connection available on Android [duplicate]

...er downtime, low signal, captive portals, content filters and the like can all prevent your app from reaching a server. For instance you can't tell for sure if your app can reach Twitter until you receive a valid response from the Twitter service. ...
https://stackoverflow.com/ques... 

Access Denied for User 'root'@'localhost' (using password: YES) - No Privileges?

...ost, User, Password) VALUES ('%', 'root', password('YOURPASSWORD')); GRANT ALL ON *.* TO 'root'@'%' WITH GRANT OPTION; share | improve this answer | follow | ...