chromecast trivia

the order they were previously the dumps is serialized as a string. 6. Shelve ModuleThe shelve module is a simple k,v module that persists memory data through a file and can persist any python that pickle can support data format, "can be understood as a possible implementation of multiple dumps and, loads "Use ="Import shelveD = Shelve.open (' shelve_test ') # open a fileSave:d["Key"]=valueFetch:d,get ("key")Cryptographic modulesHashlib ModuleEncryption in Chinese/ English:Import HashlibM=HASHL

Object[] as the data sourceThe model has a property of xxx[] Unknown, in Java, object[] cannot be coerced into xxx[], if the F.set (obj,fieldobj) above, the method reflects the write value, will be an error.Specific methods://obj As Object//ClassKey The name of the member variable for the arrayJava.lang.reflect.Field f =Obj.getclass (). Getdeclaredfield (classkey);//Get Array typeClass Fieldclazz =F.gettype ();if(Fieldclazz.isarray ()) {object[] Arrayobjs= (object[]) value;//object[of deserializ

1.java 1/0 Running result throw exception, 1/0.0 result is infinity (infinity)2.A%D is defined as (A/b)b+a%d=a (A/B's Chamber of Commerce to 0 rounding) and therefore -14%3 =-2; 14%-3=23.,|,^ represents an integer bitwise, with, OR, XOR.4. A static method cannot use another static method as a parameter5.system.out.println (2.0e-6100000000.1);//200.00000026.system.out.println (' B ');//bSystem.out.println (' B ' + ' a ');//197System.out.println ((char) (' a ' +4));//e7. Converting positive intege

. In this topic, we need to use the BufferedReader class and the InputStreamReader classpublicstatic void Main (String [] args) throws ioexception{BUFFEREDREADERBR = new BufferedReader (new InputStreamReader (system.in));STRINGSTR = null;System.out.println ("Enteryour value:");Str= Br.readline ();System.out.println ("Yourvalue is:" +str);}So we can get the string we entered.Method Three: This method I think is the simplest, the most powerful, is to use the scanner classpublicstatic void Main (St

1.getattribute () unconditional invocation2. Data descriptor (an instance of the class that defines the __get__\__set__ method)--Called by the GetAttribute () of 1, the data descriptor is converted to: the current class name. __dict__[' x '].__get__ (Instance,owner) "--If we redefine the __getattribute__ method, it may result in no way to invoke the data descriptor3. Dictionary of the current object--If the data description conforms to the property name of the current object dictionary, the data

Problem:In the production or experimental environment often encounter directory unloading situation, such as below, I uninstalled the/kejiandata directory when the following error occurred, it is because there is a program or process is occupying this terminal, all not allowed to uninstall. Today we will introduce a method of trying to be unpleasant.650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/83/60/wKioL1dx67XQ2XviAAAdxlNvkPM252.png "title=" Sogou 20160628111423.png "alt=" Wkiol1d

:#include#include "Windows.h"using namespace Std;void Main (){couttestcolor (no font color set)" Setconsoletextattribute (GetStdHandle (std_output_handle), foreground_intensity| foreground_red|foreground_green| Foreground_blue);//Set three-color additioncouttestcolor (add Red green blue)" Setconsoletextattribute (GetStdHandle (std_output_handle), foreground_intensity| foreground_red);Set Redcouttestcolor (set color is red)" Setconsoletextattribute (GetStdHandle (std_output_handle), foregroun

, after multiple GC still inventory objects will enter the old age,The newly created object may also go directly into the old age, large objects or large array objects, and no external objects are referenced inside the array7.5 Method AreaStores data such as class information, constants, static variables, and instant compiler-compiled code that have been loaded by the virtual machine8. GC Algorithm CorrelationGC General system random Trigger and System.GC (), and fires when Eden allocates a new

1 The C language does not allow nested annotations, such as/* /*/ //For nested annotations, because the third comment will be annotated with the first comment, and the fourth comment will be considered as part of the executable, and an error will be given. 2. To get the exact size of a type or variable on a particular platform, you can use the sizeof operator. The expression sizeof (type) gets the storage byte size of the object or type. GCA, sizeof (int) Gets the number of bytes that the int ty

-negative integer to display the factorial value of the number.Import Java.util.scanner;public class demo{public static void Main (string[] args) { Scanner input = new Scanner (S ystem.in); System.out.println ("Please enter a non-negative integer:"); int n = input.nextint (); The factorial value of System.out.println (n+) is: "+fun1 (n)); } public static long fun1 (int n) { if (n==0) return 1; else return n*fun1 (n-1);} }In fact, both nested calls and recursive call

, and thick in fact, if you do not assign a value to the Border-width property, its default value is "Medium". 7. Do you know the Empty-cells attribute in table? The Empty-cells property in CSS is supported by all browsers, even including IE8, and its usage is as follows:1:table {empty-cells:hide;}It is estimated that you have semantically guessed its usefulness. It is for the HTML table service. It tells the browser to hide it when there is nothing in a table cell.However, Empty-cells is only

.border-width property can use predefined constant valuesMaybe it's not a fresh message for you. In addition to using standard width values (such as 5px or 1em), the Border-width property can accept predefined constant values: Medium, thin, and thickIn fact, if you don't assign a value to the Border-width property, its default value is "Medium". 9. Why no one uses border-imageAlmost all modern browsers now support this property-in addition to IE10 and the following versions of IE.It looks like t

list separators and \ n Oneaccount = [" A"，" About"] APassword = [" the"，" +"] -ZH = input ("Enter your account") -Mima = input ("Enter Password") thec = Account.index (ZH)#determine the location of this account in the list and assign a value to C - ifZH = = Account[c] andMima = = Password[c]:#determine if the input account and password match - Print(Login successful) - #I have written a registered account and write to the file, the format is two files each write an account file a cipher t

name Desc: results are as follows:7.ORDER by NEWID (): Returns the random sort result.8.BETWEEN A and B: Returns a result that is greater than or equal to a, less than or equal to B. If a>b, then NULL is returned.9. Do not use the function in the where condition, forcing each row to evaluate the function and cannot use the index lookup.For example: SELECT * FROM table1 where id+3>5 and select * FROM table1 where id>5-3, which is more efficient than the former.10. Many of the columns ending in _

, the modulus of 12, that is, every 12 to start from 0, mathematically called modulo or redundancy (mod), Java, C # and C + + in the use of the remainder operation. For example:14%12=2If the correct time at this point is 6, and your watch is pointing at 8 points, how do you adjust the table? There are two ways: a watch counter-clockwise for two hours, and the second is to dial the table clockwise for 10 hours, that is8-2=6(8+10)%12=6Which means that in this module system there are8-2=8+10This is

list dict str Although it is iterable iterator the list,dict,str and other iterable into Iterator You can use the iter () function:Example:iter ([]) iterator Python iterator object represents a data flow, Iterator next () function calls and returns the next data continuously until no data is thrown stopiteration error. You can think of this data stream as an ordered sequence, but we can't know the length of the sequence in advance, only through the next () The functi

definitionsProcedure is a function with no return value5. Why does the function need to have a return value?the maximum effect is to get the only result after the function operation6. How functions are calleddefTest (x, y):Print(x)Print(y)#positional parameter invocation: The form participation argument must be one by one corresponding#Test (1,3)#keyword Call: Location does not need to correspondTest (y=1,x=2)#mix: Keyword calls must be after positional parametersTest (1,y=3)defTest (x,y=2):

collections and collection. (collections contains a variety of static polymorphism methods for set operations)5. Java SynchronizationThe Java synchronization mechanism can be illustrated by analogy to buildings.6. AliasesAn alias means that there are multiple variables pointing to the same block of memory that can be updated, respectively, with different object types.7. Heap and StackThe plot shows the location of the method and the object in memory at run time.8. Data region of Java Virtual Ru

must be a statement form. For example: println () returns void. The following calls are made in the form of a statement:System.out.println ("Welcome to java!");Let's give you two examples:1. There is a return value method:Package min;Public class demo{Public static void Main (string[] args) {int i = 5,J = 2;int k = min (i,j);System.out.println ("This minimum between" +i+ "and" +j+ "is" +k);//Printing results}public static int min (int num1,int num2) {//define a method to obtain the minimum valu

, 0.10, 0.14USER TTY from [email protected] IDLE jcpu PCPURoot pts/0 192.168.1.194 08:35 5:13m 12.15s 0.00s/bin/bash/usr/bin/ip.ssh MiyoshiRoot PTS/2 192.168.1.194 08:37 33:09 1.07s 0.00s/bin/bash/usr/bin/ip.ssh QingdaoRoot PTS/3 192.168.1.192 0.00s 0.06s 0.00s WRoot PTS/4 192.168.1.194 14:07 31:20 0.14s 0.00s/bin/bash/usr/bin/ip.ssh Qingdao MeetingRoot PTS/6 192.168.1.194 08:56 38:13 2.37s 0.00s/bin/bash/usr/bin/ip.ssh Qingdao MountainRoot PTS/7 192.168.1.194 09:07 5:23 0.10s 0.00s/bin/bash/usr