how to reduce bufferbloat

Unity3d How to reduce the size of the package to the extreme, the picture is the most space in the game app resources, so please do not understand u3d to the picture file storage way to understand, see "unity3d-texture image Space and memory consumption analysis." Because U3d does not elaborate on the compression of resources, many projects have a headache when they encounter packet size bottlenecks. I am not immortal, also painful, but experience a f

Python has several built-in functions that are interesting: map/filter/reduce, it's all about a collection, filter is easy to understand for filtering, map is used for mapping, and reduce is used for merging. Is the three carriage of the Python list method. Filter () function:The function of the filter function is equivalent to a filter. Call a Boolean function Bool_func to iterate through the element

03MapThe first parameter that is passed in map () is f,map the F action to each element of the sequence and returns the result as a new iterator.def f (x):return x * xIf you do not use map, you need to write:L = []For n in [1, 2, 3, 4, 5, 6, 7, 8, 9]:L.append (f (n))Use a map line of code to fix:List (map (f, [1, 2, 3, 4, 5, 6, 7, 8, 9]))Another map example:List (map (str, [1, 2, 3, 4, 5, 6, 7, 8, 9]))Results:[' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ']Let's look at a map exam

Reference from: Https://github.com/qiwsir/StarterLearningPython/blob/master/204.md#mapHttps://github.com/qiwsir/StarterLearningPython/blob/master/204.md#reduceMap (function name/functional expression (lambda, etc.)/..., parameter 1, parameter 2)Reduce (function name/functional expression (lambda, etc.)/..., parameter 1)Difference:1. Parameters: Reduce only one parameter is allowed in addition to the functio

Q: How to make my program installation package smaller, so that the download and installation of the program faster? A: This article collects some tips for reducing the size of the program installation package (when downloading and installing the program for the first time). If this is for the upgrade program, you can read this article (reduce the size of the download required when the iOS app is upgraded) (this is different from how the first instal

Reduce unexpectedly has a third parameter Liaoche Teacher's reduce tutorial has three parameters in that code. From functools import reduce char_to_float = { ' 0 ': 0, ' 1 ': 1, ' 2 ': 2, ' 3 ': 3, ' 4 ': 4, ' 5 ': 5 , ' 6 ': 6, ' 7 ': 7, ' 8 ': 8, ' 9 ': 9, '. ':-1 } def str2float (s): nums = map (Lambda ch : Cha

Tags: mongodbMongoDB's map reduce usesExample:res = Db.runcommand ({MapReduce: ' Liveepguservisits ',Map:function () {Emit ({Provice:this.provice}, {"Data": [{"Mac": This.mac}],visit:this.visitnum, usercount:0});},Reduce:function (key, value) {var ret = {data:[]}, visit=0var usercount=0;var macs = {};var sum = 0;for (var i in value) {var ia = value[i];for (Var j in Ia.data) {if (!macs[ia.data[j].mac]) {Macs[ia.data[j].mac] = true;Ret.data.push (Ia.dat

Python has built in some very interesting but very useful functions, fully embodies the language charm of Python! [1] Filter (function, sequence)Execute function (item) on item in sequence, and the item that executes the result of true is composed of a list/string/tuple (depending on the type of sequence) returned:>>> def F(x): returnX%2!=0 andX%3!=0 >>>Filter (F, Range (2, -)) [5,7, One, -, -, +, at]>>> def F(x): returnX! =' A ' >>>Filter (F,"ABCdef")' Bcdef '[2] Map (function, sequence)Execut

1. Basic API for first knowledge of reduce @Test Publicvoid Testreduce () {streamNew integer[]{1,2,3,4,5,6,7,8});The collection element is only and Integer result = Stream.reduce (0,Integer::sum); SYSTEM.OUT.PRINTLN (result); stream = Arrays.stream (New integer[]{1,2,3,4,5,6,7});Sum Stream.reduce((I, j), I + j).Ifpresent(System.out::p rintln);stream =Arrays.Stream(New integer[]{1,2,3,4,5,6,7}); To find the maximum valueStream.Reduce(Integer::max).I

value is added to a listDefFUN1 (x): If x >100: Return TrueElse Return FalseF1 =ListFilter (FUN1, [2, 101, 3]) # F2 = List (filter (lambda x:x% 2 = = 0, LA)) # F3 = List (filter (lambda x: True if (x > ' a ') else False, [' A ', ' B ', ' C ')]) # # Reduce (function, sequence[, initial]), value# (Summary: The continuation of the result and the next element of the sequence are cumulative calculations)# functionparameter is a function w

Use Word to generate documents, each page is around 20KB, but see the document generated with Notepad, the same content only about 1KB, so that word can also reduce weight loss? In fact, we can use some effective methods to reduce the file size of Word documents. 1. Cancel fast Save when a file is open, using fast saves requires more space than using a full save. You can select the Save tab in the tools

] │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼[ 1 4 9 16 25 36 49 64 81 ]Now, we use Python code to implement:1 def f (x): 2 ... return x * x3 ... 4 >>> r = map (f, [1, 2, 3, 4, 5, 6, 7, 8, 9])5 >>> list (r) 6 [1, 4, 9, 16, 25, 36, 49, 64, 81] map()The first parameter passed in is the f function object itself. Since the result r is one Iterator , it is an Iterator inert sequence, so the list() fu

① in terms of parameters:Map () Function:Map () contains two parameters, the first one is a function, the second is a sequence (list or tuple). Where a function (that is, a function of the first parameter position of a map) can receive one or more parameters.Reduce () function:The first parameter of reduce () is a function, and the second is a sequence (list or tuple). However, its function must receive two parameters.② from the numerical effect on th

Map (f, Itera) # Use F (x) for each elementlambda x:x**2>>> l = map (sq,[-1,0,1,2,-3])>>> list (l) [1, 0, 1, 4, 9]Of course, you can also pass in two parameters:Lambda x, y:x + y>>> l = map (lambda x, y:x + y, [1, 3, 5, 7, 9], [2, 4, 6, 8, ten ])>>> list (l) [3, 7, 11, 15, 19]Reduce (f (x), Itera) # x1 The result F (x1) Continuation and the next element of the sequence x2 do the cumulative calculation for the previousfunction F must have two parame

The requirement is the value of the map of the list that removes a key that is long and value is the integer of the element. public class Test1 {public static void main (string[] args) {map This uses the JAVA8 encoding style: 1. First initialize a key is a long, value is a list of map 2. Code is divided into two ways, a map operation, the output to remove duplicate key value, the second is after the map operation, Output duplicate key value after the r