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What does “program to interfaces, not implementations” mean?
...t worried about implementation and the interface signature determines what all operations can be done. This can be used to change the behavior of a program at run-time. It also helps you to write far better programs from the maintenance point of view.
Here's a basic example for you.
public enum La...
Basic http file downloading and saving to disk in python?
... requests is extremely helpful compared to urllib when working with a REST API. Unless, you are looking to do a lot more, this should be good.
– dparpyani
Oct 26 '13 at 16:41
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Can I query MongoDB ObjectId by date?
...Seconds + "0000000000000000");
return constructedObjectId
}
/* Find all documents created after midnight on May 25th, 1980 */
db.mycollection.find({ _id: { $gt: objectIdWithTimestamp('1980/05/25') } });
share
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REST authentication and exposing the API key
... in javascript...so if I put a flicker photo on my webpage via their API (called by javascript), and you visit my page, aren't I exposing my API key to anyone who visits my page?
– tjans
Mar 29 '11 at 13:38
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Double Negation in C++
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Most commonly encountered in the Windows API itself which doesn't know about the bool type - everything is encoded as 0 or 1 in an int.
– Mark Ransom
Jan 17 '12 at 19:42
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Check a radio button with javascript
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Technically it's CSS selector syntax. jQuery just borrowed and extended it
– Tim Seguine
Jan 16 '14 at 16:10
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What are inline namespaces for?
C++11 allows inline namespace s, all members of which are also automatically in the enclosing namespace . I cannot think of any useful application of this -- can somebody please give a brief, succinct example of a situation where an inline namespace is needed and where it is the most idiomatic s...
Can we delete an SMS in Android before it reaches the inbox?
...e number verification, services which are provisioned via SMS (though generally this should be done with data SMS), or for applications which otherwise improve the user experience by processing specially-formatted messages in order to show them in a nice Android-specific UI.
As of Android 1.6, inco...
postgresql list and order tables by size
How can I list all the tables of a PostgreSQL database and order them by size ?
7 Answers
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搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
...来，开发人员学习成本会大大减少。如果再对底层的sql API做一层封装，开发基本可以感觉不到mongodb和关系型数据库的区别。同样MongoDB也是号称自己能够快速搭建一个高可用可扩展的的分布式集群，网上有很多搭建的文章，在我...