Postgresql source code (103) expression ExprContext in PLpg/SQL

0 Summary (You can watch it last) Two structures contained in PLpgSQL_execstate: EState *simple_eval_estate, ExprContext *eval_econtext ExprContext is generally enough to be thrown to the SQL engine for execution, but ExprContext will rely on the EState structure to create it, so when PL is executed, the plpgsql_exec_function function needs to pass in the EState structure […]

The awk command of the text Three Musketeers

Awk Overview How awk works: Read text line by line, separated by space or tab key as the separator by default, save the separated fields into built-in variables, and execute the editing command according to the mode or condition. awk tends to split a line into multiple “fields” before processing. The reading of awk information […]

The sed editor of the three musketeers of text

Three musketeers of text: all read and process by line. grep filters line content. awk filter fields. sed Filters line contents; modifies line contents. sed editor sed is a stream editor that edits data streams based on a pre-provided set of rules before the editor processes the data. The sed editor can process data in […]

[echarts] line chart echarts double arrow plus text

You can directly click on this echarts example and edit it directly option = {<!– –> tooltip: {<!– –> trigger: ‘axis’, }, xAxis: [ {<!– –> type: ‘category’, boundaryGap: false, axisTick: {<!– –> alignWithLabel: true, }, axisLabel: {<!– –> textStyle: {<!– –> fontSize: 20, fontWeight: ‘bold’, }, formatter: function (value, index) {<!– –> if (index […]

News text classification task: using Transformer to achieve

If you think the content is good, welcome to like, collect and pay attention, we will continue to input more high-quality content in the future If you have any questions, please pay attention to private stamps or comments (including but not limited to NLP algorithm related, linux learning related, postgraduate and Ph.D. related…) (The cover […]

19. React pop-up window and text switching

Modal/Drawer – floating layer form – Pro Components ( reference address Show results import React, { useEffect, useState } from “react”; import { Amplify, API, graphqlOperation } from ‘aws-amplify’ import { createTodo, createBook } from ‘../graphql/mutations’ import { listTodos, listBooks} from ‘../graphql/queries’ import “../resources/Calendar.css”; import { getOverrideProps } from “@aws-amplify/ui-react/internal”; import { Button, Form, Input, […]

Text Template Technical Solution in Video Editing Scenario

Author | Lok’tar ogar guide Based on the development practice of Duka Editing APP text templates, this article shares the technical solution of static text template rendering capabilities in video editing scenarios. As a superset of the rich text rendering solution, this technical solution can be extended to other scenarios that require complex rich text […]

Python context manager

This article is translated from Python context manager Summary: In this tutorial, you will learn about Python context managers and how to use them effectively Introduction to Python context managers A context manager is an object implemented in a with statement that defines a runtime context< /strong>. Let’s start with a simple example to understand […]

python text processing attempt 2

python text processing attempt 2 Encountered a magical website: I want to copy some of its prompts above, but the website can’t even be used with the right button, and F12 can’t be used to view web page elements Then ctrl + u to view the source code of the webpage is still possible, […]