Tag:comma

  • Four methods of printing lists in Python

    Time:2022-6-23

    Original linkTitle: print lists in python (4 different ways) Print with a for loop a = [1, 2, 3, 4, 5] for x in range(len(a)): print a[x], result1 2 3 4 5 Print with * asterisk a = [1, 2, 3, 4, 5] #Separated by spaces by default print(*a) #Separated by commas print(*a, sep = […]

  • comma operator

    Time:2022-5-29

    comma operator This is an operator that can easily be ignored, but the comma operator has a magical function that is ignored This operator is introduced on the MDN as follows: **The comma operator * * evaluates each of its operands (left to right) and returns the value of the last operand. Look at this […]

  • The third day of C language

    Time:2022-5-27

    C language Supplement to last lesson — multi branch selection structure representative code int a = 3; switch (a) { case 1: { printf(“dayin =1\n”); } break; case 2: { printf(“dayin =2\n”); } break; case 3: { printf(“dayin =3\n”); } break; } Output of data Putchar — outputting a character to the screen — is […]

  • JSP from shallow to deep (7) — JSP directives

    Time:2022-5-26

    In the previous tutorial, we have used java util. Date。 Some people will ask: why not just use import Java util.* And? In fact, the import statement can also be used in JSPS, but its syntax is somewhat different from that of ordinary Java. An example is given below: <%@ page import=”java.util.*” %> <HTML> <BODY> […]

  • Study day 8

    Time:2022-5-6

    C language The general form of the for statement For — loop structure for( :) int a, sum = 0; for (a = 1; a <= 100; a++) { sum = sum + a; } printf(“sum=%d”, sum); A = 1 in parentheses is the initial value of the cyclic variable, a < = 100 is […]

  • Problems in splicing MySQL syntax in Python

    Time:2022-4-27

    The value behind the in statement of MySQL is similar to the ancestor of Python. Under normal circumstances, it can be directly passed to the ancestor. For example, we have a ancestor: TMP_ tup = (“xiaoming”, “xiaohua”) The format string SQL = f “select * from TB where name in {tmp_tup}” is OK. However, if […]

  • Java enumeration classes, so that the use of elegant and easy to understand

    Time:2022-4-24

    Java enumeration is a special class, which generally represents a set of constants, such as 4 seasons of a year, 12 months of a year, 7 days of a week, Southeast, northwest, etc. Java enumeration classes are defined by enum keyword, and constants are separated by commas.See implementation: @Test package com. foodie. enumeration; This work […]

  • Extension operator and rest parameter

    Time:2022-4-1

    Today, I’d like to introduce an ES6 syntax that I don’t have much contact with at ordinary times, but it brings a lot of convenience to coding at ordinary times – three points. These three points are mainly for the format conversion of arrays. You can also focus on my WeChat official account, snail stack.1、 […]

  • Oeasy teaches you to play with VIM – 55 – # parameter substitution

    Time:2022-3-24

    [GitHub address](https://github.com/overmind19…)[gitee address](https://gitee.com/overmind198…)[blue bridge experimental building invitation code fjwyimgb](https://www.lanqiao.cn/course…) Find details Recall the last lesson Batch replacement of pattern matching has been carried out Replace words :%s/\<a.*d\>/oeasy/g Escape character %s/^\/\/.*$/d Delete empty lines :g/^\s*$//d Are there any other ways to play? Markdown to HTML To putmarkdownIn the file*Italics* becomehtmlMedium<em>Italics</em> Write frame first s///gc Modify basic […]

  • Install tensorflow environment and jupyter under Anaconda

    Time:2022-3-23

    Tensorflow has many versions, and there are great differences between different versions. To install tensorflow 1 4 as an example to introduce the creation process. The steps for installing other versions are similar. Install tensorflow1 four 1. Open Anaconda prompt 2. Create tensorflow1 4 environment The environment is named tensorflow1 4. My Python is 3.6, […]

  • Solve the problem of incomplete display of ecarts abscissa value

    Time:2022-3-17

    Join in xaxis {}

  • MySQL stored procedures batch process strings with separators

    Time:2022-3-15

    CREATE [email protected]% PROCEDURE updateMerchantOrderNo()BEGIN #Routine body goes here… declare orderstr text; declare ordernum int; /** Number of orders**/ declare i int default 1; declare orderno text; declare updateSql text; set orderstr = “ddd”; #Array length = number of commas select length(orderstr) – length(REPLACE(orderstr,”,”,””)) + 1 into @ordernum; /*Execute view order quantity*/ select @ordernum; while i […]