Batch modification of excel files by python
Batch modification of excel by python
In the morning, I suddenly got help from my little sister. How to use the program to delete the pictures in excel in batches? As a front-end dog, I felt a little frustrated. After all, this is not my specialty. Miss said python should be OK. google it now.
It has been more than two years since I started to ...
Posted by tomhoad on Thu, 21 Nov 2019 13:12:45 +0100
Overview of common build optimization for webpack s
brief introduction
Read "Shallow web pack" to summarize common web pack construction optimization strategies, you can improve the speed of project construction by the following means
More precise loader rules
Write the loader rules clearly
Just let the files that need to be processed go into the loader process as follows
rules: [{ ...
Posted by utpal on Wed, 20 Nov 2019 22:08:25 +0100
Write a common java encryption tool class
1. narration
There are many encryption algorithm classes under the java security package, and we can simply call them. Although they have complete functions, they are a little cumbersome to use. I encapsulate some common encryption algorithms and their common methods here to simplify the code.
The structure of tool class is as follows:
Call st ...
Posted by mbarmawi on Wed, 20 Nov 2019 09:39:36 +0100
A reconstruction of business code
Business needs
The prompt on the side of listening task is dynamically prompted according to the listening time and the completion of the task.
The flow chart is as follows
Pseudo code of client
Code comments before Refactoring:
When the listening task configured by the server changes dynamically, it can be handled correctly and the code is ...
Posted by titangf on Tue, 19 Nov 2019 19:26:57 +0100
LeetCode network delay time (shortest path problem of graph)
Problem Description:
There are N network nodes marked 1 to N.
Given a list of times, it indicates the time of signal passing through the directed edge times[i] = (u, v, w), where u is the source node, v is the target node, and W is the time when a signal passes from the source node to the target node.
Now, we send a signal to ...
Posted by smeee_b on Mon, 18 Nov 2019 17:24:04 +0100
Web front end Foundation (15):jQuery Foundation
1. jQuery selector
JQuery selector is a powerful embodiment of jQuery. It provides a set of methods to make it more convenient for us to get the elements in the page.
1.1 basic selector
Examples are as follows:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
</h ...
Posted by rsnell on Mon, 18 Nov 2019 16:43:32 +0100
[Collection Series] - Deeply shallow analysis of HashMap
1. Summary
In the first chapter of the collection series, we learned that the implementation classes of Map are HashMap, LinkedHashMap, TreeMap, IdentityHashMap, WeakHashMap, Hashtable, Properties, and so on.
HashMap has always been a hot topic, and I promise you'll need it if you go out for an interview!
This article mainly combines the diffe ...
Posted by r_honey on Mon, 18 Nov 2019 03:41:56 +0100
Have you learned how PHP uploads files and downloads them?
Chapter 1 File Upload
1.1 Client Upload Settings
File upload has become a common function in B/S programs.The goal is that customers can upload files to a specified directory on the server (Server) through a browser (Browser).
Common web sites that support file upload:
Various disks
Portrait
Web Albums
Real-name authentication
Mail Attachments
...
Posted by 990805 on Mon, 18 Nov 2019 03:16:40 +0100
[Learn Data Structure 01 from Today] Arrays
When interviewing, you often ask the difference between an array and a list of chains. Many people answer, "A list of chains is suitable for insertion and deletion, with a time complexity of O(1); an array is suitable for searching, and a time complexity of O(1)."In fact, this statement is inaccurate.Arrays are suitable for lookup ope ...
Posted by jpratt on Fri, 15 Nov 2019 03:43:57 +0100
[Noip2006T3] task scheduling solution report
[Topic]
Luo Valley p1065
[thinking]
Obviously, this is a simulation problem
And it's a boring simulation
My writing is like this:
For the machine currently required
Scan its status
There is enough space to meet the process and insert it in the leftmost place
Otherwise, insert it to the far right
The inserted interval is repr ...
Posted by PDXDesigner on Wed, 13 Nov 2019 17:54:03 +0100