我正在尝试使用CSS重新创建此图像:
我不需要重复.这就是我的开始,但它只是一条直线:
#wave {
position: absolute;
height: 70px;
width: 600px;
background: #e0efe3;
}
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<div id="wave"></div>
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例如,我有4800,我想看到这个数字的所有因素.
# num = the number you want factors of
def factors_of(num)
(1..num).collect { |n| [n, num/n] if ((num/n) * n) == num}.compact
end
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divisors_of(4800)=> [[1,4800],[2,2,400],[3,1600],[4,1200],[5,960],[6,800],[8,600],[ 10,480],[12,400],[15,320],[16,300],[20,240],[24,200],[25,192],[30,160],[32, 150],[40,120],[48,100],[50,96],[60,80],[64,75],[75,64],[80,60],[96,50] ,[100,48],[120,40],[150,32],[160,30],[192,25],[200,24],[240,20],[300,16],[ 320,15],[400,12],[480,10],[600,8],[800,6],[960,5],[1200,4],[1600,3],[2400, 2],[4800,1]]
你会用红宝石或任何语言做到这一点?
我正在使用wow.js,它工作正常,除了动画都是在页面加载后立即发生,而不是在滚动到它们时.我跟着文档,但无法弄明白.
页面上没有JS错误.我包括animate.min.css和wow.js
在身体里:
<img src="images/philosophy.png" alt="Philosophy" id="philosophy-img" class="icon wow bounceInUp">
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并在页脚中:
<script>
new WOW().init();
</script>
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那么如何在滚动到特定div时使用wow.js来实现动画?
我有一个阵列
operator = ['+', '-', '*', '/']
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我想用它们以4种不同的方式解决方程式.我想它会是这样的:
operator.map {|o| 6 o.to_sym 3 } # => [9, 3, 18, 2]
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我该怎么做呢?
我有一个数组[1,2,4,5,4,7]
,我想找到每个数字的频率并将其存储在哈希中.我有这个代码,但它返回NoMethodError: undefined method '+' for nil:NilClass
def score( array )
hash = {}
array.each{|key| hash[key] += 1}
end
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期望的输出是
{1 => 1, 2 => 1, 4 => 2, 5 => 1, 7 => 1 }
Run Code Online (Sandbox Code Playgroud) 我在Wordpress中并将此iframe插入到文本小部件中.但是,我无法让地址弹出消失.
我曾经尝试都iwloc=near
和iwlock=NoSuchMarker
(结束对第五行A HREF)
<iframe width="295" height="250" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="https://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=3904+Washington+Parkway,+Idaho+Falls,+Idaho&aq=0&oq=3904+washington+parkway+idah&sll=41.833733,-87.731964&sspn=0.929078,2.113495&ie=UTF8&hq=&hnear=3904+Washington+Pkwy,+Idaho+Falls,+Bonneville,+Idaho+83404&t=p&ll=43.466874,-111.993513&spn=0.015573,0.025406&z=14&iwloc=A&output=embed">
</iframe>
<br />
<small>
<a href="https://maps.google.com/maps?f=q&source=embed&hl=en&geocode=&q=3904+Washington+Parkway,+Idaho+Falls,+Idaho&aq=0&oq=3904+washington+parkway+idah&sll=41.833733,-87.731964&sspn=0.929078,2.113495&ie=UTF8&hq=&hnear=3904+Washington+Pkwy,+Idaho+Falls,+Bonneville,+Idaho+83404&t=p&ll=43.466874,-111.993513&spn=0.015573,0.025406&z=14&iwloc=near">
</a>
</small>
Run Code Online (Sandbox Code Playgroud) 在ember中使用条件时,是否可以有一个OR
?
{{#if foo OR bar}}
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要么
{{#if foo || bar}}
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文档中似乎没有任何内容.
应用于ImageFilter.blur
图像时,图像的边缘保持不变。
如何将模糊扩展到边缘?
import 'dart:ui';
import 'package:flutter/material.dart';
class ExamplePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Container(
decoration: BoxDecoration(
image: DecorationImage(
image: NetworkImage("https://i.pinimg.com/236x/93/ca/59/93ca599d74b60b4e9b30cd9472f842b7--patterns-in-nature-beautiful-patterns.jpg"),
fit: BoxFit.cover,
),
),
child: BackdropFilter(
filter: ImageFilter.blur(sigmaX: 20, sigmaY: 20),
child: Container(
decoration: BoxDecoration(color: Colors.white.withOpacity(0.0)),
),
),
);
}
}
Run Code Online (Sandbox Code Playgroud) 我试图在注销按钮的 onPressed 方法之后调用 _signOut 函数。但是它没有(识别函数或让我调用它)但是我可以进行调用 widget.Onsignedout,对它的父级回调,一切都按预期工作。除了我在 auth.signout 上注销用户并回电只是为了更新表单。如何从状态类访问 _signOut()?谢谢你
import 'package:flutter/material.dart';
import 'package:login_demo/auth.dart';
import 'package:login_demo/root_page.dart';
class HomePage extends StatefulWidget {
HomePage({this.auth, this.onSignedOut});
final BaseAuth auth;
//To call a function of a parent, you can use the callback pattern
final VoidCallback onSignedOut;
void _signOut() async {
try {
Text('Signing Out here');
await auth.signOut();
onSignedOut;
} catch (e) {
print(e);
}
}
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar( …
Run Code Online (Sandbox Code Playgroud) 在终端中运行时:
$ curl -L https://get.rvm.io | bash -s
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它似乎工作正常,但最后在升级说明中说
* WARNING: You have '~/.profile' file, you might want to load it,
to do that add the following line to '/Users/steven/.bash_profile':
source ~/.profile
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我不能使用RVM,得到错误
-bash: rvm: command not found'
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我对终端和Ruby很新,所以任何帮助都会非常感激.
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