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ReasonAndroidstudio The import project has been stuck in building Gradle project info because the Gradle version used by the imported project is inconsistent with the Gradle version already owned by the local Causes the Gradle version required for the project to be downloaded automatically when the project is imported as. Because the download speed is too slow, it will always show the download progress bar (almost stuck in the state), if the download is complete, it can be imported normally (if

line were on the outer frame of the shape.The above description may be more abstract, so to speak, originally I realized the GUI effect is, 2 boxes, using the mouse to connect them, I draw the line is mouse punctuation and release the 2 endpoints connected to the line. However, such segments are ugly, and customers require that the two ends of the segment should be on the 2-box border.How to solve this problem? I think of the line segment as a collection of sorted points, and then I can use the

MySQL is nothing more than a subquery and two ways of connecting.The first table is Table1, the second is table2, and Table1 contains table2.SQL is:1 //Sub-query2 SelectTable1.id fromtable13 where not exists 4(Select 1 fromtable25 whereTable1.id=table2.id6 );7 8 //External Connection9 SelectTable1.id fromtable1Ten Left Jointable2 One onTable1.id=table2.id A whereTable2.id is NULL;There are similar examples in high-performance MySQL, see "When a correlated subquery is good" se

Java read large file fastest performance Full reference from: The efficiency comparison test of several large file reading methods It is said that 1.88g only about 5 seconds, not tested./** * Read large files * bufferedreader + char[] * @throws IOException*/ Public Static voidReadFile1 () throws ioexception{LongStart =System.currenttimemillis (); BufferedReader BR=NewBufferedReader (NewFileReader (filepathname)); Char[] Buff =New C

Fastest Browser list Microsoft Internet Explorer (IE): A series of web browsers launched by Microsoft, USA. As of September 2010, the statistics showed that IE shares were up to 59.65%. Until today it has hundreds of millions of loyal fans, the more common IE products include IE6.0, IE7.0, IE8.0, IE9.0 and 2011 Public Test Ie10;ie Browser market share is very high, is the world's most widely used web browsers, its pages and operating methods have lon

of soft writing There is a method called soft text, with soft Wen can write more quickly, and with soft Wen is also able to quickly increase the weight of one of the fastest way, soft paper means including submission, to engage, and so on, and so on, the intention to write soft Wen, and then reprinted the Power is enormous. On the restoration of site weight, relevance is the key, the weight is the key, the structure is the key, will all the factors

1. The latest version of jqueryjquery is updated quickly. You should always use the latest version. Because the new version improves performance and has many new features. Let's take a look at the differences in jquery performance in different versions. Here are the three most common jquery selection statements: $ ('. ELEM ') $ ('. ELEM ', context) context. find ('. ELEM ') Let's test jquery in versions 1.4.2, 1.4.4, and 1.6.2 to see how many times the browser can execute in 1 second. The result

Fastest way to fix bash Vulnerabilities If you run the following command Env x = '() {:;}; echo vulnerable 'bash-C' echo hello' Output result: Vulnerablehello You need to fix the vulnerability. Run the following command: Curl https://raw.githubusercontent.com/luofei614/bashfix/master/bashfix | bash The system will automatically upgrade to fix the bash vulnerability. Run again Env x = '() {:;}; echo vulnerable 'bash-C' echo hello' If the res

performance.Tppl started with "Template tail label segmentation", namely: Str.split ("%>"), which coincides with the implementation of Tmpl, the above string is divided into 6 paragraphs, and then use a regular replacement for each paragraph:var tpls = ["In later performance tests, it was found that this implementation was not significantly improved compared to other engines. It seems to be a further alternative.After a long time of pondering, finally found that the use of "Template header tag

of complex regular expressions. After measurement, split () truncation analysis can reduce some of the regular, better performance.Tppl started with "Template tail label segmentation", namely: Str.split ("%>"), which coincides with the implementation of Tmpl, the above string is divided into 6 paragraphs, and then use a regular replacement for each paragraph:var tpls = [", " ,", ", "段：, "];In later performance tests, it was found that this implementation was not significantly improved compared

19.208 CIN Cancel Synchronization 2.050 6.004 19.616 Fread 0.290 0.241 0.304 Read 0.290 0.398 Not supported Mmap 0.250 Not supported Not supported Pascal Read 2.160 4.668 A few questions can be seen from above. Running programs on Linux platforms is generally faster than on Windows. Programs compiled under Windows V

RowidSQL statement interpretation select * frommytable2s1whererowidin (selectridfrom (selectrownumr1, ridfrom (selectrowidrid Rowid SQL statement interpretation select * from mytable2 s1 where rowid in (select rid from (select rownum r1, rid from (select rowid rid Homepage → Database Technology Background:Read News The fastest paging speed in Oracle --- SQL statement explanation [Date: 2011-12-19] Source: Linux Author: n52376531 [F

Excel files is very slow, So mistakenly think Pyexcelerate also slow.So adding the last test item, the result shows that although the Xlsxwriter engine is used,Pandas is always thoughtful and expensive in all aspects, so try to avoid using To_excel method to generate large files. Summary: Recommended use of PyexceleratePyexcelerate file is the largest, decompression found its not used sharedstrings, string is directly inline into the XML, the default cheat, hahaXlsxwriter can also set parameter

Article Title: how to set the fastest update source in Linux. Linux is a technology channel of the IT lab in China. Including desktop applications, Linux system management, kernel research, embedded systems and open source, and other basic categories in linux, the installation of software becomes very simple, you only need to select the program you want to use in the "New Software Package Manager" that comes with the system, and then connect to the In

The Androidstudio Import project is stuck in Building gradle Project Info, actually because the project you're importing uses a gradle that's inconsistent with the Gradle version you already have, Cause need to download the Gradle version of the project, I do not know whether the wall or the reason, anyway, will always be stuck until the download is complete (if you can download it, 233)Online also provides the method, is to download gradle version of the official website, and then put on the lo

downloaded Adt-bundle-windows-xxx-xxx.zip directly to the location you need to install.Fourth step: Install the Android SDKOpen the extracted folder inside the SDK Manager.exe (You can also run Eclipse/eclipse.exe and then open via Windows--Android SDK Manager)Tick the Android version of the target phone you want to develop, preferably all on the hook, and then click Install package to prompt next,accept allow to wait for installation (this is a slow process)Fifth step: Configure the Android AV

First let's give you a installation Tutorial: From: http://my.oschina.net/ryanhoo/blog/141824 Still using the android native simulator? We recommend you an all-round Android native simulator that turns into scum in seconds: genymotion! Why? Superior PerformanceAs the fastest Android simulator in history (none), the second-level boot shutdown speed is enough for you to worship (roughly estimated 5-20 s ), should the android simulator start in 1 min

colortemp = 0;For (INT I = 0; I {Colortemp = rgbvalues [I + 2] * 0.299 + rgbvalues [I + 1] * 0.587 + rgbvalues [I] * 0.114;Rgbvalues [I] = rgbvalues [I + 1] = rgbvalues [I + 2] = (byte) colortemp;}System. runtime. interopservices. Marshal. Copy (rgbvalues, 0, PTR, bytes );Curbitmap. unlockbits (BMP data );Mytimer. Stop ();Timebox. Text = mytimer. Duration. tostring ("#######") + "millisecond ";Invalidate ();}} // This method is the fastest, about 1.7

Explanation of the annotation mechanism of the fastest development framework XUtils of Android, androidxutils In the previous article, XUtils, the most popular development framework of Android, briefly introduced the basic usage of xUtils. This article describes the annotation principles in xUtils. Let's take a look at the demo code in xUtils: @ViewInject(R.id.tabhost) private FragmentTabHost mTabHost;@ViewInject(R.id.big_img) private ImageView

Home page: Https://github.com/ServiceStack/ServiceStack.Text The home of. Net's fastest JSON, jsv and CSV text serializers. Servicestack. Text isIndependent, dependency-freeSerialization library that contains all of servicestack's text processing functionality, including: Jsonserializer Typeserializer (jsv-format) Csvserializer T. Dump Extension Method Stringextensions-XML/JSON/CSV/URL encoding, baseconvert, rot13, Hex escape, e