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Java ArrayList how to add elements at the beginning
...n element to the front of the list.
https://docs.oracle.com/javase/7/docs/api/java/util/LinkedList.html#addFirst(E)
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MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...ACL访问控制、集群、共享订阅、重要指标dashboard、sysadmin api、插件扩展、对topic或session或clientid的tracing调试等高级功能，大大简化服务器端的开发工作量。实际应用中，只需要写发布和订阅接口函数即可，中间过程对应用开发人...
Tool to read and display Java .class versions
... to read the class file signature and get these values without a 3rd party API. All you need to do is read the first 8 bytes.
ClassFile {
u4 magic;
u2 minor_version;
u2 major_version;
For class file version 51.0 (Java 7), the opening bytes are:
CA FE BA BE 00 00 00 33
...where 0xCA...
jQuery selector regular expressions
...ot of very useful selectors to avoid use of regex can be find here: http://api.jquery.com/category/selectors/attribute-selectors/
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Jackson with JSON: Unrecognized field, not marked as ignorable
... this is a very stupid default setting imho, if you add a property to your api, the whole serialization fails
– headsvk
Oct 5 '16 at 17:00
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Is there a way that I can check if a data attribute exists?
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You can use jQuery's hasData method.
http://api.jquery.com/jQuery.hasData/
The primary advantage of jQuery.hasData(element) is that it does not create and associate a data object with the element if none currently exists. In contrast, jQuery.data(element) always re...
node.js execute system command synchronously
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@JulianSoto nodejs.org/api/…
– divine
May 5 at 9:42
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Row Offset in SQL Server
...d if suitable indexes exist to allow this to be seeked efficiently - or an API cursor if they don't.
For selecting an arbitary page the best solution for SQL Server 2005 - 2008 R2 is probably ROW_NUMBER and BETWEEN
For SQL Server 2012+ you can use the enhanced ORDER BY clause for this need.
SELEC...
NSString tokenize in Objective-C
.../ Substring: 'word2'
// Substring: 'word3'
// Substring: 'word4'
This api works with other languages where spaces are not always the delimiter (e.g. Japanese). Also using NSStringEnumerationByComposedCharacterSequences is the proper way to enumerate over characters, since many non-western char...
Developing GUIs in Python: Tkinter vs PyQt [closed]
...es a very professional look, not comparable with a toolkit like Swing. The API is extensive and goes beyond the pure GUI things like widgets. It has support for database connectivity, printing, threading (I used it and it works like a charm),... I even use it to generate PDF's (no other external lib...