offset

Pagination using MySQL LIMIT, OFFSET

早过忘川 提交于 2019-12-27 11:05:07
问题 I have some code that LIMITs data to display only 4 items per page. The column I'm using has about 20-30 items, so I need to make those spread out across the pages. On the first page, I have: $result = mysqli_query($con,"SELECT * FROM menuitem LIMIT 4"); { echo "<tr>"; echo "<td align='center'><img src=\"" . $row['picturepath'] . "\" /></td>"; echo "<td align='center'>" . $row['name'] . "</td> <td align='center'> <input type='button' value='More Info'; onclick=\"window.location='more_info.php

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让人想犯罪 __ 提交于 2019-12-26 02:04:25
沪深港通资金数据hsgt_data 20191224 nan nan 0.0 20190628 nan nan 0.0 # -*- coding: utf-8 -*- import pandas as pd import tushare as ts import lxml from redis import Redis import hashlib import pymysql import time # =============================================================两市成交总额============================================================= def tradeTotalamount(conn_mysql,conn_redis,cur_date): # 定义计数器 success, fail, count = 0, 0, 0 # 定义两市总成交额 total_amount = 0 # 创建MySQL操作游标 cursor = conn_mysql.cursor() try: sql = '''insert into hs_total_amount_data(trade_date,total_amount) values('%s','%s')''' % (trade

WAV文件格式分析

▼魔方 西西 提交于 2019-12-25 22:58:28
ref: https://www.jianshu.com/p/63d7aa88582b 概览 WAV文件是在PC机平台上很常见的、最经典的多媒体音频文件,最早于1991年8月出现在Windows 3.1操作系统上,文件扩展名为WAV,是WaveFom的简写,也称为波形文件,可直接存储声音波形,还原的波形曲线十分逼真。WAV文件格式简称WAV格式是一种存储声音波形的数字音频格式,是由微软公司和IBM联合设计的,经过了多次修订,可用于Windows,Macintosh,Linix等多种操作系统。 RIFF file format RIFF全称为资源互换文件格式(Resources Interchange File Format),是Windows下大部分多媒体文件遵循的一种文件结构。RIFF文件所包含的数据类型由该文件的扩展名来标识 Chunk RIFF 文件结构可以看作是树状结构,其基本构成是称为"块"( Chunk )的单元,每个块有"标志符"、"数据大小"及"数据"所组成 public static class Chunk { //4个字节 public String chunkId; //4个字节。指的是 data的长度 public int dataSize; public byte[] data; } chunkId 4字节,用以标识块中所包含的数据。如: RIFF ,

Elasticsearch 分词器

我怕爱的太早我们不能终老 提交于 2019-12-25 15:01:03
转载链接: https://www.cnblogs.com/cjsblog/p/10171695.html 无论是内置的分析器(analyzer),还是自定义的分析器(analyzer),都由三种构件块组成的:character filters , tokenizers , token filters。 内置的analyzer将这些构建块预先打包到适合不同语言和文本类型的analyzer中。 Character filters (字符过滤器) 字符过滤器以字符流的形式接收原始文本,并可以通过添加、删除或更改字符来转换该流。 举例来说,一个字符过滤器可以用来把阿拉伯数字(٠‎١٢٣٤٥٦٧٨‎٩)‎转成成Arabic-Latin的等价物(0123456789)。 一个分析器可能有0个或多个字符过滤器,它们按顺序应用。 (PS:类似Servlet中的过滤器,或者拦截器,想象一下有一个过滤器链) Tokenizer (分词器) 一个分词器接收一个字符流,并将其拆分成单个token (通常是单个单词),并输出一个token流。例如,一个whitespace分词器当它看到空白的时候就会将文本拆分成token。它会将文本“Quick brown fox!”转换为[Quick, brown, fox!] (PS:Tokenizer 负责将文本拆分成单个token

Using offsetx and offsettop in JavaScript or position x and positon y

旧城冷巷雨未停 提交于 2019-12-25 07:20:09
问题 I have a slider that starts at click on button and I want every image to be loaded at a offset of 200 px in comparison with the previous one. Here is the code: var image1 = new Image() image1.src = "img0.jpg" var image2 = new Image() image2.src = "img1.jpg" var image3 = new Image() image3.src = "img2.jpg" var image4 = new Image() image4.src = "img3.jpg" var image5 = new Image() image5.src = "img4.jpg" var step = 1 function slideit() { document.images.slide.src = eval("image" + step + ".src")

ELK学习笔记-ES-分词

孤人 提交于 2019-12-25 05:29:45
官方文档位置:https://www.elastic.co/guide/en/elasticsearch/reference/7.5/analysis.html 分词 分词是指将文本转化成一系列的单词(term or token)的过程,也可以叫文本分析 es里称之为Analysis 分词器 分词器是es中专门处理分词的组件,英文为Analyzer ,它的组成如下: Character Filters 针对原始文本进行处理,比如去除html特殊标记符 Tokenizer 将原始文本按照一定规则切分为单词 Token Filters 针对 tokenizer处理的单词就行再加工,比如转小写、删除或新增等处理 分词器-调用顺序 Analyze API es提供了一个测试分词的api接口,方便验证分词效果, endpoint是_ analyze 可以直接指定analyzer进行测试 可以直接指定索弓|中的字段进行测试 可以自定义分词器进行测试 直接指定Analyzer进行测试,接口如下: POST _analyze { "analyzer":"standard", //分词器,standard是es默认分词器,如果字段里没有指定分词器,会默认使用standard "text":"hello world!" //测试文本 } 输出: { "tokens": [ { "token":

Calculate how much user has scrolled (incl margins & paddings)

泄露秘密 提交于 2019-12-25 03:04:12
问题 I'm stuck with a very annoying problem. I'm trying to create a script that changes the menu bar (CSS) when the user has X pixels scrolled (height of header element). However, any jQuery script I've tried doesn't calculates the scrolled distance correctly. After some pixels it stops counting, and continues.. and then resumes, stops, resumes, etc. I think it may have something to do with padding and/or margins.. Anyway, I need some support. Check out the current site, with a 'distance scrolled'

Show nav menu after scrolling up 50px

喜夏-厌秋 提交于 2019-12-24 12:00:26
问题 I want to show a sticky menu nav when scrolling up while also having a delay before showing the nav menu. I can do this with animate and opacity, but it's not as effective. I tried to show the nav menu when scrolling up 50px from the current position, but it didn't work. Here's the script: var previousScroll = 0, headerOrgOffset = $('#header').height(); $('#header-wrap').height($('#header').height()); $(window).scroll(function () { var currentScroll = $(this).scrollTop(); if (currentScroll >

VB.Net Get Offset Address

故事扮演 提交于 2019-12-24 10:23:34
问题 In VB.Net I open a file with BinaryReader.. I need to find on the file for some Hex values and if they are found, it return the offset address of the first Byte.. It is possible? and how can achieve this? Thank you EDIT: My current code: Private Function findOffset() Using reader As New BinaryReader(File.Open(filename, FileMode.Open)) ' Loop through length of file. Dim pos As Integer = 0 ' <== THIS IS THE OFFSET Dim length As Integer = reader.BaseStream.Length Do While pos < length ' Read the

JQPlot Y-Axis Label Offset

女生的网名这么多〃 提交于 2019-12-24 09:26:31
问题 My JQPlot chart is currently rendering everything correctly, but the only issue is that the tick labels are being overlapped by the chart. Is there anyway I can offset the labels to prevent this from happening or a simple option change? I haven't found anything on the JQPlot website about this, so any help would be appreciated. Here's some sample code: var moduleTypesChart = $.jqplot("moduleTypesChart",[moduleTypesCount], { title:'<h2>Module Types Distribution</h2>', seriesColors:["darkred"],