转载：Build a Web Crawler in Go One of the basic tests I use to try out a new programming language is building a web crawler. I stole the idea from my colleague Mike Lewis and I love it because it uses all the principles necessary in internet engineering: A web crawler needs to parse semi-structured...

读取文件的每一行到 mysql 的 memo 栏位 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107package mainimport...

# go package 1> package 可以和目录名不一致 2> main func 必须在 main package 里 3> gopath 可以有多个，例如 D:\study\go;C:\Users\11435\Desktop\practice\go , go 会按照 gopath 查找...

转载: ORACLE-BASE - SQL/XML (SQLX) : Generating XML using SQL The example code in this article assumes you have access to the SCOTT schema. # The Past In Oracle 9i Release 1 it was necessary to use several database object types to create complex XML documents using...

转载: ORACLE-BASE - XMLTABLE : Convert XML Data into Rows and Columns using SQL # Tag-Based XML This example uses tag-based XML, where each data element for an employee is surrounded by its own start and end tag. First we create a table to hold our XML document and populate it with a document...

# xlrd xlrd 读取 excel, 使用 xlrd 读取 excel 数据需要注意的类型. Sample Type symbol Type number Python value Converted value XL_CELL_EMPTY 0 empty string ‘’ None abc XL_CELL_TEXT 1 a Unicode string 123 XL_CELL_TEXT 1 a Unicode string 123.0 XL_CELL_TEXT 1 a Unicode...

转载: 前端 Cheat Sheet 分享 | cheatsheet-frontend 转载: AakashRao-dev/CSS-Cheatsheets: Get all of my CSS Cheatsheets from here which I have created & shared on twitter. Thanks for the support. 💜 Rico’s cheatsheets # HTML Head # HTML Input Types # CSS Units # CSS BoxModel # CSS FlexBox # CSS...

转载: ORACLE-BASE - WITH Clause : Subquery Factoring in Oracle # Setup The examples below use the following tables. 12345678910111213141516171819202122232425262728293031323334353637383940-- DROP TABLE EMP PURGE;-- DROP TABLE DEPT PURGE;CREATE TABLE DEPT ( DEPTNO NUMBER(2) CONSTRAINT PK_DEPT PRIMARY...

转载: PL/SQL RAISE Exceptions By Practical Examples Summary: in this tutorial, you will learn how to use the PL/SQL RAISE statement to raise a user-defined exception, internally defined exception, and reraising an exception. To raise an exception explicitly, you use the RAISE statement. The RAISE...