Small board can also be used to burn the CPLD, but hex cannot be downloaded to the S52 microcontroller, then I use a programmer to burn the Hex file into the S52 chip, but the program on the Development Board still cannot run (no 0x55 data on the serial port ), it took me a whole day to understand this problem. Today, by accident, I put the burned chip on another board for use and found that the program can run normally, the serial port displays data 0x55. Therefore, we suspect that the hardwar
;>> Msg. format ("alex", 22)'My name is 22, and age is alex'>>> Msg = "my name is {name}, and age is {age }">>> Msg. format (age = 22, name = "ale ")'My name is ale, and age is 22'Format_map>>> Msg. format_map ({'name': 'Alex ', 'age': 22 })'My name is alex, and age is 22'
Msg. index ('A') returns the index of the string where a is located.'9a'. isalnum () True
'9'. Whether isdigit () is an integerName. isn
,name= ' Bob '):# print (' Send to ', address, ' success ', ' contents ', content, ' name is ', name)# return True# while True:# em = input ("Input address:")# result = Send (em, ' SB ', ' ale ')# if result = = True:# print (' Send success ')# Else:# print (' Send failed ')#这里是定义了三个参数, where name is the default parameter, has a default value, but the argument passes two parameters, so name uses the default parameter# def send (address, content, name=
(' a ') find A, Find returns its index, cannot find return-1 format: >>> msg = "My name is {}, and" was "{}" >>> Msg.format ("Alex", "Isa") ' My name is Alex ', and ' was ' >>> msg = "My name is {1}, and" was "{0}" >>> Msg.format ("Alex", "Isa") ' My name is ', ' and ' was Alex ' > gt;> msg = "My name is {name}, and age is {age}" >>> Msg.format (age=22,name= "ale") ' My name is ale, and Format_map >>> msg
is Alex;' ->>> msg ="My name is {1}, and age is {0}" the>>> Msg.format ("Alex", 22) - 'My name is a, and age is Alex' ->>> msg ="My name is {name}, and age was {age}" ->>> Msg.format (age=22,name="Ale") + 'My name is ale, and an IS' - Format_map +>>> Msg.format_map ({'name':'Alex',' Age': 22}) A 'my name is Alex;' at - -Msg.index ('a') returns the index of the string where A is located - '9aA
functions supported by the device. With CFI, new and improved products can be used to replace older versions of the product without modifying the system software.A Nandflah interface mainly contains the following information:
I/O line: addresses, directives, and data are transmitted through this set of lines, typically 8-bit or 16-bit.
chip start (Chip enable,ce#): If no ce# signal is detected, the NAND device remains in standby mode and does not respond to any control signals
still depends on us. If it runs abnormally, there may be an error in dump Memory: for (i = 0, vm = p->mm->mmap; vm!=null; i++, VM = vm->vm_next) { unsigned char valid_mem; /* Dump the memory segment * /Valid_mem = Valid_memory_segment (regs, p->mm, VM); /* Dump pages and shared libs if we are allowed to * /if (! ( ((no_binary valid_mem) | | (No_shrlib !valid_mem)) (!) ( Vm->vm_flagsvm_write) | | (Vm->vm_flagsvm_mayshare)) vm->vm_file) { if (Dump_vm_area (f, p, VM
name is Alex, and it is 22 '>>> msg = ' My name is {1} ' and ' age ' is {0} '>>> Msg.format ("Alex", 22)' My name is a, and is Alex '>>> msg = ' My name is {name} ' and ' is ' {age} '>>> Msg.format (age=22,name= "ale")' My name is ale, and the is 22 'Format_map>>> msg.format_map ({' name ': ' Alex ', ' age ': 22})' My name is Alex, and it is 22 'Msg.index (' A ') returns the index of the string where A is
RE Module (* * * * *)In essence, a regular expression (or RE) is a small, highly specialized programming language (in Python) that is embedded in Python and implemented through the RE module. The regular expression pattern is compiled into a sequence of bytecode, which is then executed by a matching engine written in C.Character match (normal character, metacharacters):1 Ordinary characters: Most characters and letters will match themselves>>> Re.findall (' Alvin ', ' Yuanalesxalexwupeiqi ')[' A
invoked at all times in the PHY state machine function, so be aware of it. The code is as follows:
static void Cpsw_adjust_link (struct net_device *ndev) {struct Cpsw_priv *priv = Netdev_priv (ndev); bool link = false; for _each_slave (Priv, _cpsw_adjust_link, Priv, link); if (link) {netif_carrier_on (Ndev);//notify the kernel subsystem network that the current link is ok if (netif_running (Ndev)) Netif_wake_queue (Ndev);} else {netif_ Carrier_off (Ndev); Notifies the kernel subsystem network t
WHERE condition constraint to take the record out of the tableGroup BY is then grouped by default, without groupingAnd then do the aggregationThe final Select resultsExample: select COUNT (*) from employee; Select COUNT (*) from employee where depart_id=1; Select Max (Salary) from employee; Select min (Salary) from employee; Select AVG (Salary) from employee; Select sum (Salary) from employee; Select sum (Salary) Form employee WHERE depart_id=3;Ix. additions to where (usin
Data class Operation # # #insert#=====INSERT into student (sname,gender,class_id) VALUES (' ls ', ' Male ', 1)Insert into Class (caption) VALUES (' Python1 class ')Insert into teacher (tname) VALUES (' Alex ')Insert into course (cname,tearch_id) VALUES (' Python ', 1)Insert INTO score (Student_id,corse_id,number) values (4,3,60);update=====Update score set number=87 where sid=1;delete===Delete from score where sid=1;select====================select*from表select *from表whereid > 1selectnid,name,gen
= "my name is {1}, and age is {0}" >>> msg.format("alex",22) 'my name is 22, and age is alex' >>> msg = "my name is {name}, and age is {age}" >>> msg.format(age=22,name="ale") 'my name is ale, and age is 22'format_map >>> msg.format_map({'name':'alex','age':22}) 'my name is alex, and age is 22'Num1 = [11,22, 33] num2 = (11,22, 33) # num3 = {'A' = 11, 'B' = 22, 'c' = 33} myStr = 'Hello
recommend MgO, then with the public bar, to GitHub on the search of MgO, installation download.
GitHub Address: Https://github.com/go-mgo/mgo
Website address: Http://labix.org/mgo
Installation address:go get gopkg.in/mgo.v2
API Document Address: HTTPS://GODOC.ORG/GOPKG.IN/MGO.V2
Demo available on the website:
Package Mainimport ( "FMT", "Log" " gopkg.in/mgo.v2" " gopkg.in/mgo.v2/bson") type person struct { Name String Phone String}func main () { sessio
(T_NAME)-------------ABCDEEE7 rows selected
Replace the upper () function content with uppercase lettersSQL> SELECT UPPER (T_NAME) FROM test_partitioning2;UPPER (T_NAME)-------------ABCDEEE7 rows selected
Ltrim () removes leading and trailing spaces (two leading and trailing spaces)
SQL> select length (ltrim ('oracle '), length (ltrim ('oracle', '') from dual;LENGTH (LTRIM ('oracle ') LENGTH (LTRIM ('oracle ',''))-------------------------------------------------8-- The second parameter in ltrim
PHONE string} type Men struct {Persons [] Person} const = (URL = "192.168.2.175: 27017 ") func main () {session, err: = mgo. dial (URL) // connect to the database if err! = Nil {panic (err)} defer session. close () session. setMode (mgo. monotonic, true) db: = session. DB ("mydb") // Database Name collection: = db. C ("person") // If the set already exists, the system returns the number of elements in the/***** set ********* countNum, err: = collection. count () if err! = Nil {panic (err)} fmt.
This is a creation in
Article, where the information may have evolved or changed.
Using MgO Http://godoc.org/labix.org/v2/mgo
packagemainimport ( "FMT" "Labix.org/v2/mgo" "labix.org/v2/mgo/ Bson ") Typepersonstruct{namestringphonestring}type Menstruct{Persons[]Person}const= (URL= " 192.168.2.175:27017 ") Funcmain () {session,err:=mgo. Dial (URL) //Connection Database iferr!=nil{panic (ERR) }defersession. Close () session. SetMode (MgO. Monotonic,true) db:=session. DB ("MyDB") //database nam
element ******* temp: = person{PHONE: "18811577546", NAME: "Zhangzhehero"}//can insert more than one object at a time insert two person object err = collection. Insert (person{"Ale", "+55 8116 9639"}, temp) if err! = Nil {panic (err)}//***** query Single data ******* Result: = person{} err = collection. Find (Bson. m{"Phone": "456"}). One (AMP;RESULT) FMT.println ("Phone:", result.name, result.) PHONE)//***** Query multiple data ******* var person
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