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: This article mainly introduces the de-duplication of php multi-dimensional arrays (de-duplication of any key value)-unique two-dimensional arrays-time complexity ~ On. For more information about PHP tutorials, see. Take a two-dimensional array as an example to deduplicate any key value. The time complexity is ~ O (n), only one foreach Loop: Array ('name' => 'James ', 'age' => 30,), '1' => array ('name'

This article reprinted to http://blog.csdn.net/zhaopenghhhhhh/article/details/24972645Sometimes it is necessary to remove duplicate elements from the Nsarray, and the presence of elements in the nsarray is not necessarily the nsstring type. Today I think about it, add friends help, think of two solutions, first divided into the following.1. Using the Nsdictionary AllKeys (allvalues) methodYou can save the elements in the Nsarray in a dictionary, and then use AllKeys or allvalues to get all the k

Differential Evolution (de) for continuous function optimization (an algorithm by kenth price and Rainer Storn) Table of Contents History Basics Practical advice De-Applet Java code C code Matlab code SCILAB code Psather code C ++ code FORTRAN90 code Python code LabVIEW code R code Pascal code Demo-Programs Applications of de Commercial SW usin

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Caocao Cang Ting broke the first Xuan de Jingzhou according to Liu BiaoBut said Cao Shaozhao defeated, Rectification Army horse, meandering chase attack. Yuan Shao towel unlined, more than 800 ride, Ben to Liyang North Shore, General Shanyi Canal out of the village to greet. Before the case of the Yi Canal. Yi Qu is a scattered audience, all Saishao, and all ants together. Military potential complex vibration, the discussion also Jizhou. The time of t

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Array de-weight, front-end interview loves the problem, the problem is simple and can see a programmer to the computer program implementation process of understanding how.There are a lot of ways to get an array, which is the ideal one, I'm not sure. So I tested the efficiency of the next array de-weight. Test 200,000 data and experience it more efficiently as the data becomes more efficient.Here are my thre

Earlier this year, I reported a Flash and AIR debugger named Archropod. Here we mention that De MonsterDebugger is another debugger released this year to facilitate Flash, Flex, and air application development. To learn more about this tool, InfoQ interviewed De MonsterDebugger's chief developer Ferdi Koomen. Koomen first introduces what is De MonsterDebugger:

Original: The principle that the union operator in SQL Server is de-weighed when merging data and the default sorting of the result of the Union operator queryThe source of this article: http://www.cnblogs.com/wy123/p/7884986.htmlThere's another discussion about union and union all, and for union and union all, the biggest thing on the net is the performance problem (I don't want to say it: Union ALL is faster than union)Actually don't want to fry Uni

He Cai Classic de-Fog algorithmOne: Best paper from Jane to the United States (He Cai Ming Vichier)"Visual robot: Personal feeling learning his classic algorithm is very important, but his problem-solving approach is also very worthy of our study."It was the morning of April 24, 2009, and I received an unusual e-mail. The sender was the chairman of CVPR 2009, who said that my article won the CVPR 2009 Best Paper Award (Paper Award). I read the e-mail