placeholder

How to create a label inside an <input> element?

送分小仙女□ 提交于 2019-12-02 14:06:42
I would like to insert a descriptive text inside an input element that disappers when the user click on it. I know it is a very common trick, but I do not know how to do that.. What is the simplest/better solution? <input name="searchbox" onfocus="if (this.value=='search') this.value = ''" type="text" value="search"> A better example would be the SO search button! That's where I got this code from. Viewing page source is a valuable tool. If you're using HTML5, you can use the placeholder attribute. <input type="text" name="user" placeholder="Username"> In my opinion, the best solution involves

Bootstrap select dropdown list placeholder

断了今生、忘了曾经 提交于 2019-12-02 14:05:50
I am trying to make a dropdown list that contains a placeholder. It doesn't seem to support placeholder="stuff" as other forms do. Is there a different way to obtain a placeholder in my dropdown? Brakke Yes just "selected disabled" in the option. <select> <option value="" selected disabled>Please select</option> <option value="">A</option> <option value="">B</option> <option value="">C</option> </select> Link to fiddle You can also view the answer at https://stackoverflow.com/a/5859221/1225125 Use hidden: <select> <option hidden >Display but don't show in list</option> <option> text 1 </option

doraemon的python 偷懒之后的更新 CRM项目 后台管理系统

百般思念 提交于 2019-12-02 13:00:54
### 12. CRM项目 1.项目需求 cunstomer relationship managemennt 客户关系管理系统 1. 注册 2. 登录 3. 销售: 1. 客户信息的管理 1. 展示 2. 新增 3. 编辑 4. 删除 2. 跟进记录管理 1. 展示 2. 新增 3. 编辑 4. 删除 3. 报名记录的管理 1. 展示 2. 新增 3. 编辑 4. 删除 4. 缴费记录的管理 1. 展示 2. 新增 3. 编辑 4. 删除 4.表结构 1. 用户表 2. 客户表 3. 跟进记录表 4. 报名记录表 5. 缴费记录表 6. 班级表 7. 课程记录表 8. 学习记录表 ```python class RegForm(forms.Form): username = forms.CharField( min_length = 6, max_length = 32, label = '用户名', initial = '初始值', error_messages = { 'required':'必填', 'min_length':'最小长度', 'invalid':'' }, validators = [], widget = forms.TextInput(attrs = {''}) ) gender = forms.ChoiceField(choices=[(1,'男'),

Tensorflow从零到精通

十年热恋 提交于 2019-12-02 12:57:54
Tensorflow是一种计算图模型,即用图的形式来表示运算过程的一种模型。Tensorflow程序一般分为图的构建和图的执行两个阶段。图的构建阶段也称为图的定义阶段,该过程会在图模型中定义所需的运算,每次运算的的结果以及原始的输入数据都可称为一个节点(operation ,缩写为op)。我们通过以下程序来说明图的构建过程: 程序2-1: 程序2-1定义了图的构建过程,“import tensorflow as tf”,是在python中导入tensorflow模块,并另起名为“tf”;接着定义了两个常量op,m1和m2,均为1*2的矩阵;最后将m1和m2的值作为输入创建一个矩阵加法op,并输出最后的结果result。 我们分析最终的输出结果可知,其并没有输出矩阵相加的结果,而是输出了一个包含三个属性的Tensor(Tensor的概念我们会在下一节中详细讲解,这里就不再赘述)。 以上过程便是图模型的构建阶段:只在图中定义所需要的运算,而没有去执行运算。我们可以用图2-1来表示: 第二个阶段为图的执行阶段,也就是在会话(session)中执行图模型中定义好的运算。 我们通过程序2-2来解释图的执行阶段: 程序2-2: 此外,我们还可以利用CPU或GPU等计算资源分布式执行图的运算过程。一般我们无需显示的指定计算资源,Tensorflow可以自动地进行识别,如果检测到我们的GPU环境

Hide placeholder value with JQuery

a 夏天 提交于 2019-12-02 12:21:26
问题 I have a lot of templates with some text input like this: <input type="text" autocomplete="off" value="" placeholder="Keywords" name="keywords" id="keywords"> The client asked me to hide the placeholder value (Keywords in the example) when the user click on the field. I don't know how to do this with JS and JQuery. Is there a way to make this happen with a crossbrowser solution? 回答1: Try this: { check it if cross browser } http://jsfiddle.net/MDhtj/1 $('input[placeholder]').on('focus',

how to get textbox value in placeholder on code behind?

倾然丶 夕夏残阳落幕 提交于 2019-12-02 12:03:43
问题 I created some textbox and I want to get their value dynamically. Briefly, ı explain my page: I have dropDown list has number 1 to 15.When the user select number and I created textbox as selected number. for example; user select 3 and I create 3 text box and user write something in textbox. Here is My Code: aspx Side: <asp:DropDownList ID="ddlUserSelected" AutoPostBack="true" OnSelectedIndexChanged="ddlUserSelected_SelectedIndexChanged" runat="server"> <asp:PlaceHolder ID="PlaceHolder1" runat

Styling part of the text in the placeholder

*爱你&永不变心* 提交于 2019-12-02 11:08:46
I would like to modify the css style of a part of placeholder . Attention not all the placeholder . If my placeholder is: "Where (example: New York)" <label>Search:</label> <textarea placeholder="Where (example: New York)" required="required"> </textarea> Can i set as italic only (example: New York) ? For all the placeholder look here You may want to think about what the role and meaning of placeholders is. Most UI experts agree: placeholders are not labels. Labels (like "Search") are labels, and should be outside the text area. The placeholder is designed to be a sample input, or a format,

MySQL/Python -> Wrong Syntax for Placeholder in Statements?

三世轮回 提交于 2019-12-02 11:05:10
问题 I am trying to use placeholder in an insert-statement. I am using PyCharm/Python 3.6, a MySQL-Database, and the mysql.connector (don't know which of them exactly.) Why doesn't the following code work? insert_stmt = "INSERT INTO mydb.datensatz (Titel) VALUES ('%s');" data = (titel) cursor.execute(insert_stmt, data) cnx.commit() titel is a string. This is what gets inserted, but I need to have the titel-string into that row. When deleting the ' ' in the values-braces, PyCharm gives me an error

[iOS]UITextView+Placeholder

旧时模样 提交于 2019-12-02 11:03:19
以前为UITextView的占位符纠结过很多次,使用过多种方式处理过,最近找到了一种别人处理的方式,比较完美. 资源下载 ,自己下载使用的,会control+c的同学没必要下载,哈哈 // The MIT License (MIT) // // Copyright (c) 2014 Suyeol Jeon (http:xoul.kr) // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the

Flyway详解以及Springboot集成Flyway(转)

我们两清 提交于 2019-12-02 10:41:54
Flayway是一款数据库版本控制管理工具,,支持数据库版本自动升级,Migrations可以写成sql脚本,也可以写在java代码里;不仅支持Command Line和java api ,也支持Build构建工具和Spring boot,也可以在分布式环境下能够安全可靠安全地升级数据库,同时也支持失败恢复。 Flyway最核心的就是用于记录所有版本演化和状态的MetaData表,Flyway首次启动会创建默认名为SCHEMA_VERSION的元素局表。 表中保存了版本,描述,要执行的sql脚本等; sql脚本的格式:V+版本号 +双下划线+秒速+结束符 例如:V1__INIT_DATABASE.sql 上面的V 是默认值, 可以通过 flyway.sql-migration-prefix来指定前缀 , Migrate: Migrate是指把数据Schema迁移到最新版本,在Migrate时会检查MetaData元数据表,如果不存在就创建MetaData表,MetaData用于记录数据库历史变更等信息; Migrate会扫描指定文件系统或者classpath下的Migrations。会与MetaData中的记录进行对比,进行版本升级; Clean:清除掉对应数据库Schema中所有的对象,包括表结构,视图,存储过程等,clean操作在dev 和 test阶段很好用; Info