reModular
common method
findall()
Returns all eligible results in a list.
1 import re
2 print(re.findall('\d','a1b2c2abc123'))#['1', '2', '2', '1', '2', '3']
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search()
Finding the first matching information returns an object containing matching information (returning None if not found), which looks at the result through the group () function
1 import re
2
3 str = 'a1b2c2abc123'
4 print(re.search('\d', str).group()) # 1
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match()
Starting from string, location matching, others with search ()
1 import re
2
3 str = 'a1b2c2abc123'
4 print(re.match('\d', s...
【CSummary of language completion function
Under the header file < math.h>, four rounds, five entries, upwards rounding, and down rounding. See the documentation.
Four homes and five entries:double round(double arg);//Returns the nearest integer to arg.
Rounding up:double ceil(double arg);//Returns the smallest integer that is not less than arg.
Down to rounding:double floor(double arg);//Returns the largest integer greater than arg.
Examples:
#include <stdio.h>
#include <math.h>//round(),floor(),ceil()
int main()
{
//Rounding
printf("round(+2.33) = %+.1f...
Title: sorting problems.
Idea: Unordered_map is used to store the mapping between the examinee’s name and the score information structure. The score is initialized to – 1. Each score is updated when reading the data. Finally, the final score is calculated and the qualified students are saved into vector, and then sorted. It is important to note thatWhen calculating final results, remember “G must be rounded up to an integer”. The summing up function is summarized here.
Code:
#include <iostream>
#include <string>
#include <unordered_map>
#include <...
1. EL syntax and usage
EL(Expression Language)It is to make JSP easier to write.
1、Grammatical structure
${The name attribute value of the domain object}
2、Method of value acquisition
From small to large: page, request, session, application
If it is found, it shows, if it is not found, it continues to look up, and if it is not found in the application, it displays an empty string
If you need to fetch the value of the specified domain scope, you can set the corresponding domain scope (pageScope, requestScope, session Scope, ...
The latest classic Linux operation and maintenance brothers, Linux operation and maintenance learning notes,,
—————
1.5 times the entire play, refueling, I will be able to finish Linux———————-UnixDevelopment history of LinuxIntroduction of open source softwareLinuxApplication areaLinuxLearning methods——————-Unix：Ken Baer, from the American Laboratory of Baer.1971In 2004, Denis Ricci invented the C language.———LinuxThe system was born in 1991, written by -Linus, Finla...
Euler’s theorem：
> positive integer. a , n > φ(n) is the Euler function.（1~n) Andn coprime.
a，n >, son, that is to say.
> because there are φn n >:（aφn -1）X1 * X2 * …… * Xφn ≡ 0 （mod n）
n is coprime, so, （aφn -1）| n“.aφn≡1（mod n）.” The Euler theorem is proved.
, any integer.a
Recently, when using element-ui to build a project, I found it unfriendly for beginners to configure various files to run element-ui only with webpack.
Think of using vue-cli to build the entire Vue project.
1.Install node.js
2.Install webpack
Global install webpack command
npm install webpack -g
3.Installation of Taobao mirror [fast speed children’s shoes can be omitted].
1 npm install -g cnpm --registry=https://registry.npm.taobao.org
4.vueScaffold global installation — used to generate Vue templates
npm install -g vue-cli
Understanding it as a way to get you started quic...
A little bit.
Ideas: large integer addition, palindrome number judgment. It is also necessary to determine whether the number of first input is palindrome, so we use do… While instead of while.
Code:
#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
bool judge(const string &str)
{
int i=0,j=str.size()-1;
while(i<=j){
if(str[i]!=str[j]) return false;
i++;
j--;
}
return true;
}
string add(const string& s1,const string& s2)
{
string sum;
int carry=0,temp,d;
for(int i=s1.siz...
