03 2022 档案
摘要：https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_character_encoding?view=powershell-7.2 In general, Windows Po
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摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="wi
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摘要：App.vue <template> <div id="heart" @click="toggleFlag"> <span :class="{active:flag}"></span> <span :class="{active:flag}"></span> </div> </template> <
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摘要：main.ts import { createApp } from 'vue' import App from './App.vue' import { createPinia } from 'pinia' const store = createPinia() const app = create
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摘要：web storage API: <script> for(let b = 0; b < 10; ++b) { localStorage.setItem(`vault-${b}`, `vaunt-${b}`) } console.log(localStorage.length) localStora
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摘要：main.ts import { createApp } from 'vue' import App from './App.vue' const app = createApp(App) type Filter = { format: <T extends any>(str: T) => stri
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摘要：import { onMounted } from 'vue' type Options = { elem: string } const base64 = (elem: HTMLImageElement) => { const canvas = document.createElement('ca
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摘要：<template> <div v-move class="box"> <div class="header"> </div> <div>zax</div> </div> </template> <script lang="ts" setup> import { ref, DirectiveBind
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摘要：vite.config.ts import { defineConfig } from 'vite' import vue from '@vitejs/plugin-vue' import * as path from 'path' // https://vitejs.dev/config/ exp
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摘要：Server端设置3s才返回数据 单线程 import requests, random, string, datetime def download(url): print('start') response = requests.get(url) print('complete') lst =
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摘要：改造老旧教程案例: asyncio.gather import asyncio async def b(): print(5) await asyncio.sleep(2) print(55) return 5 async def p(): print(4) await asyncio.sleep(
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摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="wi
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摘要：使用Promise封装ajax function ajax (url) { return new Promise((resolve, reject) => { let xhr = new XMLHttpRequest() xhr.onreadystatechange = function () {
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摘要：通用公式: a % b = a - int(a / b) * b 取整: 向下取整 -∞方向 floor(a/b) 取底除法Python 向零取整, 舍弃小数, 截断除法C Java Javascript 取模公式通用, 但是因为取整的区别, Python的取模跟其他语言不一样,Python真是怪胎
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摘要：正常情况, 赋值给其他变量 public class B { public static void main(String[] args) { int bb = 5; int pp = ++bb; System.out.println(pp); } } public class B { public
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摘要：span width: fit-content line-height flex table grid transform
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摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="wi
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摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="wi
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摘要：margin <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" cont
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摘要：version: "3.9" volumes: data: external: false config: external: false plugins: external: false kibana: external: false networks: demo: name: demo exte
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摘要：Single Node: cluster.name: vagrant-cluster node.name: vagrant #node.attr.rack: r1 #path.data: /path/to/data #path.logs: /path/to/logs #bootstrap.memor
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摘要：# 增量更新 POST wares/_update/1/ { "doc":{ "id":3 } } # 查看mapping get wares/_mapping
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摘要：# 指定 _id 查询 get wares/_doc/1 # 查询所有 get wares/_search { "query":{ "match_all": {} } } # 指定 term get wares/_search { "query":{ "term":{ "description":{
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摘要：# tokenizer put /orders { "settings":{}, "mappings":{ "properties":{ "title":{ "type":"text", "analyzer":"standard" } } } } put /orders/_doc/1 { "titl
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摘要：Aggregation可不指定查询条件, 默认查询所有 求和: 以price进行分组 # 以price进行分组 get vanilla/_search { "query":{ "match_all": {} }, "aggs":{ "group_price":{ "terms": { "field"
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摘要：from fastapi import FastAPI, Request, Response, Header, Body, Form, Cookie from fastapi.responses import JSONResponse, ORJSONResponse, FileResponse, H
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摘要：const arr = ['a', 'a', 'a', 'd', 'e', 'f'] for (let i = 0; i < arr.length; ++i) { console.log(`arr.length = ${arr.length}, i = ${i}`) if (arr[i] 'a')
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摘要：put wares { "settings":{ "number_of_shards": 1, "number_of_replicas":0 }, "mappings":{ "properties":{ "id":{ "type":"integer" }, "title":{ "type": "ke
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摘要：以下测不出效果, 因为程序逻辑是在function two中执行 <script> function one () { console.info('one') } function two () { setTimeout(() => { console.info('two') }, 1) } fun
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摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="wi
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摘要：BFC: block formatting context <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <me
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摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="description" content=""> <meta name="keywords" content="bait bark"> <meta h
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摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="description" content=""> <meta name="keywords" content="bait bark"> <meta h
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摘要：let b = { n1: 11, n2: 22, n3: 44, n4: 55, ns: { n1, n2 } } n1 n2 不是变量, 是b的key let t={22,33} let b = { n1: 11, n2: 22, n3: 44, n4: 55, ns: { this.n1, t
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摘要：let i = 0 setTimeout(function (n) { console.log(55, n) }, 1000, setTimeout(function () { console.log(44, i) i++ return i+2 })) 先计算第三参数, 返回值为Timeout对象,
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摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="description" content=""> <meta name="keywords" content="bait bark"> <meta h
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摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="description" content=""> <meta name="keywords" content="bait bark"> <meta h
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摘要：random() 返回一个介于左闭右开[0.0, 1.0)区间的浮点数 基本方法 random.seed(a=None, version=2)初始化伪随机数生成器。如果未提供a或者a=None，则使用系统时间为种子。如果a是一个整数，则作为种子。 random.getstate()返回一个当前生成器
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摘要：https://superuser.com/questions/867728/user-vs-system-environment-variables-do-system-variables-override-user-variabl 除了Path变量外, User Variables 优先级高,
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摘要：tk(toolkit)是用来做图形用户界面（GUI graphical user interface）的工具，与tcl命令结合可以创建和操作GUI的窗口组件，Python里面也有一个叫Tkinter的模块作为Tk GUI的接口。 Tcl/Tk快速入门_最实用的Linux博客-CSDN博客
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摘要：with open(file) as f: for line in f: for field in line.split(): print(filed) import re from collections import defaultdict valve = '''51.222.253.18 -
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摘要：Named Capturing Groups: Backreferences: \number \1 匹配结果的第一个分组 \g<number> \g<1> 匹配结果的第一个分组, 避免歧义 \g<named_group> \g<valor> 匹配命名分组 valor (?P<valor>expre
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摘要：Python: 当 \char 不构成转义序列时, \ 被作为普通字符, \1 \100 八进制转义序列 Javascript: Java:
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摘要：import re from collections import defaultdict regex = re.compile(r'[^\w-]+') valor = defaultdict(lambda: 0) with open(file = 'statistic.txt', mode = '
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摘要：IP -> int import socket ip = '5.5.5.5' def inet_aton(a: str): n = 0 for i, v in enumerate(reversed([int(n) for n in a.split('.')])): n += v << (8 * i)
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摘要：newline: (windows) Only for text mode 写: newline=None (default) newline='' newline='\n' other Summarize: 写文件时, 全部使用 '\n' , newline=None 替换成 os.linesep
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