Python list deduplication method you should know, python list deduplication Method
Preface
List deduplication is a common problem when writing Python scripts, because no matter where the source data comes from, when we convert it into a list, the expected results may not be our final results, the most common thing is that the Meta in the list is repeated. At this
Disable Windows deduplication and windows deduplication
Deduplication can reduce disk usage, but improper use may also increase IO. In addition, this function also blocks the hard disk. Therefore, when the hard disk usage is high, it is also difficult to fragment, So you sometimes need to disable the deduplication fun
the server and detects and eliminates duplicate content within the service side . Both deployment methods can improve storage space efficiency, the main difference is the source-side de-emphasis by consuming customers. the efficiency of data deduplication can be evaluated from two dimensions of time and space. In terms of timeliness, the data can be re- Square Method Strokes points to be in the Line go to Heavy (
This article mainly introduces the sample code for de-duplication and de-duplication of JS arrays. If you need it, you can refer to it for help.
Method 1: deduplication
The Code is as follows:
ScriptArray. prototype. distinct = function (){Var a = [], B = [];For (var prop in this ){Var d = this [prop];If (d = a [prop]) continue; // prevents loops to prototypeIf (B [d]! = 1 ){A. push (d );B [d] = 1;}}Return;}Var x = ['A', 'B', 'C', 'D', 'B', 'A', 'A',
Array deduplication Array, Array deduplication Array
var aee3=[31,42,13,19,5,11,8,13,40,39,1,8,44,15,3]; Array.prototype.unqu2=function(){ this.sort(); var arr2=[this[0]]; for (var j = 1; j
There are a lot of de-duplication methods on the Internet, and the most stupid is the second method, and the best efficiency is the third one.
(1) inline function (from the third edition of C ++ primer)
In the function declaration or definition, add the keyword inline before the function return type to specify min () as inline.
Inline int min (INT first, int secend ){/****/};
The inline function must be visible to
The purpose of introducing the inline function is to solve the efficiency problem of function call in the program, and to replace the parameter macro definition with the inline function (function parameters are more convenient to use than macros).
The inline keyword is used to define an inline function for a class.
The
I. Planning the deployment goalsData deduplication for Windows 8.1server 2012 is designed to be installed on the primary data volume without adding any additional dedicated hardware. This means that you can install and use the feature without affecting the primary workload on the server. The default is non-invasive because they allow the data "lifetime" to reach five days before a particular file is processed, and the default minimum file size is up t
Text in a block element, picture centered:CSS settings: text-align:centerstyletype= "Text/css">Div{text-align:Center;}style>Head>Body>Div>imgsrc= "Http://img.mukewang.com/52b4113500018cf102000200.jpg" >Div>:Element classification:block element , inline element (also called inline Element) , and inline block element .The most common block elements are:The commonly
Block and inline, inline and inline-block, block-level and intra-row elements, intra-row replacement and intra-row non-replacement elements, inlineinline-block
Block: the default display attribute of block-level elements is block. No matter how much content is in the block, the display attribute is always full;
Inline
1 Inline Label2 em>It is emphasized that most browsers render as italic. 3 Strong>It is emphasized that most browsers render as bold. 4 Sub> Subscript5 sup>superscript6 7Inline labels are typically used to style text in a line and do not cause line breaks. Common inline tags includeI>Italic,em>、Strong>Andb>. 8 9 Code>Mark a piece of codespan>General Inline Labels
[Guide]What are the differences between data compression and deduplication? In practice, how can we apply it correctly? I have not studied the principles and technologies of Data Compression before, so I did some homework, read and sort out relevant materials, and compared and analyzed the data deduplication technology.
In the face of the rapid expansion of data, enterprises need to constantly purchase a l
Hyper-V Server data deduplication technologySwaiiow heard that the new technology in Windows Server 2012 is called Deduplication, which is said to save disk space significantly, and let's look at what deduplication is:Data deduplication refers to finding and deleting duplicates in the data without affecting their fidel
Q: What are the advantages and disadvantages of the software-based deduplication and hardware-based deduplication products?
A: software-based deduplication aims to eliminate source redundancy, while hardware-based deduplication emphasizes data reduction of the storage system. Although bandwidth compensation cannot
HTML elements are defined as block-level elements or Inline elements. So What Are block-level elements, inline elements, and inline elements?
Block-level element (block) features:When a block-level element is displayed in a browser, it usually starts (and ends) with a new line ). Width, height, padding, and margin can be controlled, just as
In Windows 2012, you can enable data deduplication for non-system volumes. Deduplication optimizes volume storage by locating redundant data in the volume, and then ensuring that the data is saved in only one copy of the volume. This is accomplished by storing the data in a single location and providing this location reference for other redundant copies of the data. Since data is divided into 32-128kb chunk
Label:Let's say we have a MongoDB collection, take this simple set as an example, we need to include how many different mobile phone numbers in the collection, the first thought is to use the DISTINCT keyword, db.tokencaller.distinct (' Caller '). Length If you want to see specific and different phone numbers, then you can omit the length property, since db.tokencaller.distinct (' Caller ') returns an array of all the mobile phone numbers. but is this a way of satisfying all things? Not
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