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MapReduceInsert test Data Firstfor (Var i=1;i{Db.test.insert ({_id:i,name: ' mm ' +i});}For MapReduceDb.runcommand ({MapReduce: ' Test ',Map:function () {Emit (This.name.substr (0,3), this);},Reduce:function (key,vals) {return vals[0];},//Note: Vals is an object instead of an arrayOut: ' Wq '});Attention:1.mapreduce is grouped according to the first parameter of the emit function called in the map function.2. Key and document collections are processed by the reduce function only if a key matche

", $keyf: function (DOC) {return {age:doc.age};},initial:{num:0}, $reduce: function (doc , prev) {prev.num++},finalize:function (doc) {Doc.count=doc.num;delete doc.num;}});About MapReduceFirst insert test datafor (Var i=1;iNote:1.mapreduce is grouped according to the first parameter of the emit function called in the map function.2. Key and document collections are processed by the reduce function only if a key matches multiple documents after grouping by grouping key. Like what:Db.runcommand ({

grouping key group, the key and document set are handed over to the reduce function for processing. For example: Db. runCommand ( { Mapreduce: 'test ', Map: function () {emit (this. name. substr (0, 3), this );}, Reduce: function (key, vals) {return 'wq ';}, Out: 'wq' }); Run the mapreduce command to view the wq table data: Db. wq. find () {"_ Id": "mm1", "value": "wq "} {"_ Id": "mm2", "value": "wq "} {"_ Id": "mm3", "value": {"_ id": 3, "name": "

(%RBP),%rax; MOV addres s value of y into%raxmovsd (%rax),%xmm1movq-16 (%RBP),%raxmovsd (%rax),%xmm0mulsd%xmm0,%xmm1;%xmm1 = y.px * y.pxmovq-16 (%RBP),%raxmovsd8 (%rax),%xmm2movq-16 (%RBP),%raxmovsd8 (%rax),%xmm0 mulsd%xmm2,%xmm0;%xmm0 = y.py * y.pyaddsd%xmm0,%x mm1;%xmm1 + =%xmm0movq-16 (%RBP),%raxmovsd16 (%rax),%xmm2movq-16 (%RBP),%raxmovsd16 (%rax),%xmm0mulsd%xmm2,%xmm0; XMM0 = Y.pz * y.pzaddsd%xmm1,%xmm0;%xmm0 + =%XMM1CALL_Z4SQRTD; call sqrt with

effort, it is time to promote publicity, do not bury the special skills of others.Ii. Introduction to CSS directionBasically, you just care about the following two attribute values:direction:ltr; Default value Direction:rtl;Among them, ltr is the initial value, represents Left-to-right, is from left to right meaning, and then specifically described below, is the inline content is from left to right in order to arrange, we usually web page processing is such, for example, before and after two

">Script>styletype= "Text/css">/*. Demo img{width:512px;}*/@media screen and (max-width:1024px){Body:after{Display:none;content:' Normalscreen ';} /*. Demo img{width:256px;}*/}style>Head>Body>DivID= "Demo"class= "Demo">Div>Body>Script>varOdemo=document.getElementById ("Demo"), Oimage= NULL, Screentypecache;//declaring VariablesvarFunimage= function() { varScreentype=window.getComputedStyle (Document.body,": After"). GetPropertyValue ("content"); //get content in the body pseudo-class if

By delete Deleting map the element: // 初始化一个字典rating := map[string]float32{"C":5, "Go":4.5, "Python":4.5, "C++":2 }// map有两个返回值，第二个返回值，如果不存在key，那么ok为false，如果存在ok为truecsharpRating, ok := rating["C#"]if ok { fmt.Println("C# is in the map and its rating is ", csharpRating)} else { fmt.Println("We have no rating associated with C# in the map")}delete(rating, "C") // 删除key为C的元素 As mentioned above, it map is also a reference type, if two map points at the same time to the bottom, then one chan

content is from left to right in order to arrange, we usually web page processing is such, for example, before and after two pictures, by default, the DOM in front of the display on the left. RTL is another value, right-to-left abbreviation, that is, from right to left meaning, and then specifically described below, that is, inline content is from right to left to arrange, add the application of this CSS declaration, then the front and back two pictures, by default, the DOM in front of the disp

In front, we played HTTP, quite a bit of meaning, in this article, we continue to play FTP (File Transfer Protocol). Both HTTP and FTP are application-layer protocols built on TCP, no matter how they are packaged, how they are loaded bigger, and ultimately TCP end-to-end transmission. This paper is divided into two parts: first. Use Wireshark to capture the content of FTP client GG and FTP server mm. Two. Use C code to briefly simulate the FTP client that implements Windows.Description, the expe

. Prefetchloop:Mov ebx, [esi + ecx * 8-64]; read one address in this cache line...Mov ebx, [esi + ecx * 8-128];... and one in the previous lineSub ecx, 16; 16 QWORDS = 2 64-byte cache linesDec eaxJnz. prefetchloop Mov eax, CACHEBLOCK/8 . Writeloop:Prefetchnta [esi + ecx * 8 + 512]; fetch ahead by 512 bytes Movq mm0, qword [esi + ecx * 8]Movq mm1, qword [esi + ecx * 8 + 8]Movq mm2, qword [esi + ecx * 8 + 16]Movq mm3, qword [esi + ecx * 8 + 24]Movq

is the number of points to note when using the map: -Map is unordered , each time the map will be different, it can not be obtained by index, and must be obtained through key -The length of the map is not fixed , that is, like slice, is also a reference type -The built-in len function also applies to the map, returning the number of keys the map has -map values can be easily modified by numbers["One"]=11 can be easily change the dictionary value of key one to one The initiali

Common commands for linux system information retrieval 1. disk information [wang @ localhost desktop] $ du-sh. /mm392K. /mm [wang @ localhost desktop] $ du-ak. /mm376./mm/boot_nontrust.bin4. /mm/bt. sh0./mm/check. md54./mm/rtk8723_bt... common commands for linux system information retrieval 1. disk information [wang @ localhost desktop] $ du-sh. /mm392K. /mm [wang @ localhost desktop] $ du-ak. /mm376. /mm/boot_nontrust.bin4. /mm/bt. sh0. /mm/check. md54. /mm/rtk8723_bt_config4. /mm/startup. x392

); Buildingshelper::install (Uenodes); Netdevicecontainer Uedevs;uedevs= ltehelper->Installuedevice (uenodes); Ptr0)->getobject (); Ptr1)->getobject(); MM0->setposition (Vector (5.0,5.0,1.5)); MM1->setposition (Vector (30.0,40.0,1.5));4. Complete the configuration of the building and mobility model:Buildingshelper::makemobilitymodelconsistent ();See the Buildings module documentation for details. Reference documentsHttps://www.nsnam.org/docs/models/h

The 23 Design Patterns of Java come from http://blog.csdn.net/leshui/archive/2003/11/20/11951.aspx. Design PatternProgramMember's "internal power" is increasingly affected by. netCommunityThis change is very gratifying. the Java Community is ahead of us, but this situation may change one day. Talking about 23 Java design modes from the perspective of mm1. Factory-try to catch up with mm. The chicken wings of McDonald's and the chicken wings of KFC

Test condition: for Windows + MongoDB 1.8.2, insert the test data first: for (var I = 1; I MapReduce // Insert test data first For (var I = 1; I { Db. test. insert ({_ id: I, name: 'mm' + I }); } // MapreduceDb. runCommand ({Mapreduce: 'test ',Map: function () {emit (this. name. substr (0, 3), this );},Reduce: function (key, vals) {return vals [0] ;}, // Note: vals is an Object rather than an arrayOut: 'wq'}); Note:1. mapreduce groups emit functions based on the first parameter called by the

maximum storage addressMOV R3, DPLSJMP MM3MM2: mov a, B; compared with the minimum valueCLR CSubb a, R7JNC MM3; the value is greater than or equal to the current minimum value, and the current minimum value is maintained.MOV R7, B; update the minimum valueMOV R4, DPH; update the minimum storage addressMOV R5, DPLMM3: DJNZ R1, MM1; process full dataPop dph; restore the first data addressPOP DPLMME: RET (25) number: MMS function: calculate the maximum

client obtains the address of the chat room.2. The system places the address of a chat room.3. The customer connects to the chat room4. The system returns the successful logon information.5. End of use casePrerequisites: you must first know the address of the chatting room server.Post condition: Add a user to a chat roomBackup event stream 14. When the number of connected chat rooms reaches the upper limit, the system returns a message indicating that the chat room is full.Alternate event strea

1 Tr2 10 Task register 2 TR3 11 Task register 3 Tr4 100 Task register 4 Tr5 101 Task register 5 Tr6 110 Task register 6 Tr7 111 Task register 7 Floating point register St0 0 Floating point register zero ST1 1 Floating point register 1 St2 10 Floating point register 2 St3 11 Floating p

incorrect !! ");ImageView imageView = new ImageView (this );ImageView. setImageResource (R. drawable. mm1 );/** Set the background image */Builder. setView (imageView );/** Buttons on the left */Builder. setPositiveButton ("OK", new DialogInterface. OnClickListener (){@ OverridePublic void onClick (DialogInterface dialog, int which ){SetTitle ("click the OK button on the left! ");}});/** Intermediate button */Builder. setNeutralButton ("details", new

; // restore Css3 background-blend-mode background Mixed mode It can be a mix of background images, or a mix of background images and background colors.Compatibility: IE 8 ~ 11 Edge 12 ~ 14 Firefox 41 ~ 47 chrome 45 ~ 51 Safari 7 ~ 9.1CSS3 backgrounds supports multiple backgrounds in IE9 + browsers. Therefore, you need to mix multiple images with commas (,) and write them in the background attribute one by one,. Box {Background: url(mm1.jpg) no-repeat