velocity

2019独角兽企业重金招聘Python工程师标准>>> Velocity "#"用来标识Velocity的脚本语句，包括#set、#if 、#else、#end、#foreach、#end #if($info.imgs) xx #else xxx #end "$"用来标识一个对象(或理解为变量)； $msg "{}"用来明确标识Velocity变量 "!"用来强制把不存在的变量显示为空白 $!msg #set ($i=0) #foreach($info in $list) 序号:$i #set($i=$i+1) #end 单行## XXX 多行#* xxx 双引号 与 引号 #set ($var="helo") 强制string相等 "$var"="helo" 类型先定义后使用 #set($xx= "9") #set($Integer = 0) $Integer.parseInt($xx) 条件语句 #if( $foo ) #end #if($foo) #elseif() #else #end 常用实例 #foreach($course in $courses) <option value="$course.id" #if("$!query.query_course_id"=="$!course.id") selected #end>$!course.name $!course

I'm trying to add a jQuery post to some JavaScript on a web page. The entire page is built up of several Velocity templates. Everything has been fine until I've tried to add the jQuery post, now I get: org.apache.velocity.exception.ParseErrorException: Encountered "," at line 282, column 24 of /WEB-INF/velocity/www/comments.vm Was expecting one of: "(" ... <RPAREN> ... <ESCAPE_DIRECTIVE> ... ~~~snip~~~ Line 282 is $.post(... and column 24 appears to be the first "," character. Initially I had the JSON on this line, but I moved it up (to the var myJSONObject ... line)as I thought the error

The net seems to be full of comparisons between Velocity and FreeMarker, and they seem to be reasonably equivalent. But there seems to be almost no comparisons between StringTemplate and FreeMarker! So, what are the main differences between StringTemplate and FreeMarker? My usage for them would be to generate HTML pages only. Out of the two, I would've expected FreeMarker to be the more suitable and more capable, as that seems to the more common one - but through a quick glance it seems that StringTemplate actually has more suitable features! It would be great if someone who has used both

Can you do something like this in a velocity template? #set ($map = $myobject.getMap() ) #foreach ($mapEntry in $map.entrySet()) <name>$mapEntry.key()</name> <value>$mapEntry.value()</value> #end it outputs blank tags like so: <name></name> and <value></value> What am I doing wrong? Your mistake is referring to key and value as methods (with trailing "()" parenthesis) instead of as properties. Try this: #set ($map = $myobject.getMap() ) #foreach ($mapEntry in $map.entrySet()) <name>$mapEntry.key</name> <value>$mapEntry.value</value> #end In other words, use either a property, like mapEntry.key

Can anyone provide some idea/logic to write the pagination logic for the search page i am working on? The information i have is total number of pages for that search- 10 records per page also i am been sent the both the previous and next page number(no problem writing the logic all i need to do i pull that info and populate. I am also getting the info which page i am on. I can only display 10 pages like below <previous 1 |2 |3 | 4| 5 | 6 | 7 | 8 | 9 | 10 next> Say if total pages are 15 and when user click next then i need to display like this <previous 2 |3 |4 |5 |6 |7 |8 |9 |10 |11 next> At

为什么 现在Android提供了fling(velocity)函数，但如果需要fling(distance)，fling滑动一段距离呢？ 如果需要知道fling(velocity)花了多少毫秒呢？ just do it 根据Android源代码，我们可以通过高中数学来实现这些功能。直接上代码 mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); mMaximumVelocity = ViewConfiguration.get(context) .getScaledMaximumFlingVelocity(); mMinimumVelocity = ViewConfiguration.get(context) .getScaledMinimumFlingVelocity(); float ppi = context.getResources().getDisplayMetrics().density * 160.0f; mPhysicalCoeff = SensorManager.GRAVITY_EARTH // g (m/s^2) * 39.37f // inch/meter * ppi * 0.84f; // double distanceEs = getSplineFlingDistance(1000

这是第二节基础知识课，第一节见： Python自学–基础知识点汇总（1） 第一个问题，什么是 Python ？根据 Python 之父 Guido van Rossum 的话，Python 是： 一种高级程序语言，其核心设计哲学是代码可读性和语法，能够让程序员用很少的代码来表达自己的想法。 对于我来说，学习 Python 的首要原因是，Python 是一种可以优雅编程的语言。它能够简单自然地写出代码和实现我的想法。 另一个原因是我们可以将 Python 用在很多地方：数据科学、Web 开发和机器学习等都可以使用 Python 来开发。Quora、Pinterest 和 Spotify 都使用 Python 来进行他们的后端 Web 开发。那么让我们来学习一下 Python 吧。 类&对象 一些理论： 对象是对现实世界实体的表示，如汽车、狗或自行车。这些对象有两个共同的主要特征：数据和行为。 汽车有数据，如车轮的数量，车门的数量和座位的空间，并且它们可以表现出其行为：它们可以加速，停止，显示剩余多少燃料，以及许多其他的事情。 我们将数据看作是面向对象编程中的属性和行为。又表示为： 数据→ 属性和行为 → 方法 而类是创建单个对象的蓝图。在现实世界中，我们经常发现许多相同类型的对象。比如说汽车。所有的汽车都有相同的构造和模型（都有一个引擎，轮子，门等）。每辆车都是由同一套蓝图构造成的

I had asked a question earlier regarding ExecutorService and Apache Velocity initialization. To give a quick recap -- I have a Java EE frontend which accepts user requests and then for each of these requests, uses ExecutorService(SingleThreadedExecutor set as a daemon) to kick off a lengthy workflow.This workflow is contained in a library and works well and as expected when run in a standalone mode through eclipse. When called from the website(servlet) I observed that the workflows were consistently getting hung at the point where the Velocity Engine was being initialized (Velocity.init() or