Why does Alibaba prohibit MyBatis from batch inserting thousands of data and using foreach
1. Method foreach batch insert
Because the code of the project cannot be leaked. The following is the simulated code.
<insert id="batchInsert" parameterType="java.util.List">
insert into USER (id, name) values
<foreach collection="list" item="model" index="index" separator=",">
(#{model.id}, #{model.name})
< ...
Added by PTS on Wed, 02 Feb 2022 08:50:16 +0200
python tips003 -- collapse of DataLoader_ FN parameter usage details
background
Recently, I was looking at the source code of sensors transformers and found a data loader in a module collate_ FN, I didn't understand what it meant at that time. Later, I checked it and found it very interesting, so let's share it.
dataloader
dataloader must know that it provides an iterator for data.
Basic working mechanism:
...
Added by andygrant on Tue, 04 Jan 2022 03:29:17 +0200
Practice learning the basics of batch files (. bat)
target
Through practice, learn the basic writing method of bat file. Main reference tutorials: http://www.trytoprogram.com/batch-file/ https://www.tutorialspoint.com/batch_script/index.htm
0. First bat file
Open a text editor and enter the following text:
@echo off
echo Hello bat
pause
Save it as a suffix bat file.
Just double click the ...
Added by toivo on Wed, 29 Dec 2021 05:04:21 +0200
MyBatis source code analysis - plug-in related
In this article, I will introduce the source code of the plug-in. The MyBatis plug-in is a good function, similar to Spring's Aop, so that our users can operate SQL flexibly at specific points of the process.
Allow me to quote an online introduction because I think it is well summarized: MyBatis allows us to intercept and call a certain point ...
Added by jtgraphic on Wed, 15 Dec 2021 22:22:13 +0200
Batch | test tool | LAN speed test / network upload and download speed test
Batch processing to achieve LAN speed test / network upload and download speed test
It is used to detect the transmission speed of WIFI module / wired network card / RJ45 or LAN
---
Iperf is a network performance testing tool. Iperf can test the maximum TCP and UDP bandwidth performance. Iperf has a variety of parameters and UDP characterist ...
Added by tet3828 on Fri, 03 Dec 2021 00:09:12 +0200
Python's Flask routing and blueprint
1. Routing
@app.route('/index')
def index():
return "hello world"
1.1 query routing information
Command line mode
Note: at least flag must be specified_ App environment variables
>flask routes
Endpoint Methods Rule
-------- ------- -----------------------
index GET /index
static GET /static/<path:filena ...
Added by auamy on Tue, 30 Nov 2021 12:11:48 +0200
lstm token classification model code parsing (pass batch data directly, test pad and pack_padded, pad_packed three functions)
lstm token classification model code parsing
Code reference to teacher Che Wanxiang's
<plm-nlp-code/chp4/lstm_postag.py >
You need to copy the entire folder to install nltk code to run properly
import nltk
nltk.download()
#Select to install all
1. Loading data
import torch
from torch import nn, optim
from torch.nn import functio ...
Added by jwagner on Tue, 09 Nov 2021 19:01:14 +0200