base | 易学教程

How do I set a page's base href in Javascript?

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I want to set a page's base href attribute in Javascript based off of the current hostname. I have generated HTML pages that can be viewed on different hostnames, which means generating a base href tag will work in one hostname but will be incorrect in the other. Zach Gardner The correct way of doing this is to do a document.write of the tag based off the current hostname: Correct: <script type="text/javascript"> document.write("<base href='http://" + document.location.host + "' />"); </script> This method has produced correct results in IE, FF, Chrome, and Safari. It produces a (correct)

python3（十九）Partial func

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# 偏函数（Partial function） # 如int()函数可以把字符串转换为整数，当仅传入字符串时，int()函数默认按十进制转换 print(int('12345')) # 12345 # 但int()函数还提供额外的base参数，默认值为10。如果传入base参数，就可以做N进制的转换： print(int('12345', base=8)) # 5349 print(int('12345', 16)) # 74565 print(int('1000000', 2)) # 64 # 也可以自定义二进制转换 def int2(x, base=2): return int(x, base) print(int2('1000000')) # 64 # --------------------------------------------------------------------- # 使用functools.partial就是帮助我们创建一个偏函数的， # 不需要我们自己定义int2()，可以直接使用下面的代码创建一个新的函数int2： import functools int22 = functools.partial(int, base=2) print(int22('1000000')) # 64 # 所以，简单总结functools.partial的作用就是

如何把下载好的rpm包变成可用的yum源

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1、下载createrepo、lrzsz yum -y install createrepo lrzsz 2、下载http或者nginx yum -y install httpd 3、配置分享网站 1 setenforce 0 2 sed -i 's/=enforcing/=disabled/g' /etc/selinux/config 3 systemctl start httpd 4 systemctl enable httpd 5 rm -rf /var/www/html/* 6 rm -rf /etc/httpd/conf.d/welcome.conf 7 firewall-cmd --add-port=81/tcp --permanent 8 firewall-cmd --add-port=82/tcp --permanent 9 firewall-cmd --reload 4、把Windows下载好的压缩包利用lrzsz放到/var/www/html并且解压： 5、进入到其中一个文件夹中 1 eg： 2 cd base 3 createrepo ./ 6、yum源配置完成配置系统yum源： 1 cat > /etc/yum.repos.d/1.repo <<EOF 2 [base] 3 name=base 4 baseurl=http://虚拟机IP/base 5

Django project base template

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Can I create a base template for my project which all apps can draw from? Or do I have to create a base template for each app? And if I wanted them to be the same I'd just copy them? Kenny Shen Sure you can. A quick example of a base.html <!DOCTYPE html> <html> <head> <title>My Project</title> </head> <body> {% block content %}{% endblock content %} </body> </html> And say you have a app called myapp with a view.html page, {% extends "base.html" %} {% block content %} <h2>Content for My App</h2> <p>Stuff etc etc.</p> {% endblock content %} Take some time to read the docs for more information

Search in SVN repository for a file name

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We have a bulk repository for code contain thousands of folder and sub folder, i want to search under this repositor with file name or with some word. Root folder a\ b\ c\ d\ e\ f\ab\ f\ab\cd.txt I want to search for cd.txt but dont know where it is in SVN Repository, for that i want to perform a search on the root folder of SVN where i will put the file name cd.txt and run the command, will check in each folder and will display the file details result.... Hope requirement is clear. Can you please help me on this. If the file is in your working copy, then if you are using svn 1.5: svn list -

C++ 类的大小

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1.类的大小与什么有关系？与类大小有关的因素：普通成员变量，虚函数，继承（单一继承，多重继承，重复继承，虚拟继承）与类大小无关的因素：静态成员变量，静态成员函数及普通成员函数 2.空类空类即什么都没有的类，按上面的说法，照理说大小应该是0，但是，空类的大小为1，因为空类可以实例化，实例化必然在内存中占有一个位置，因此，编译器为其优化为一个字节大小。某类继承自空类： class base { }; class derived:public base { private: int a; } 此时，derived类的大小为4，derived类的大小是自身int成员变量的大小，至于为什么没有加上父类base的大小1是因为空白基优化的问题，在空基类被继承后，子类会优化掉基类的1字节的大小，节省了空间大小，提高了运行效率。 3.一般类的大小（注意内存对齐）首先上两个类的示例： class base1 { private: char a; int b; double c; }; class base2 { private: char a; double b; int c; }; 虽然上述两个类成员变量都是一个char，一个int，一个double，但是不同的声明顺序，会导致不同的内存构造模型，对于base1，base2，其成员排列是酱紫的： base1： base2： base

My python code that converts numbers between bases has several errors. What could be wrong and how can I find them?

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My program is a function that converts numbers from one base to another. It takes three arguments: the initial value, the base of the initial value, then the base it is to be converted to. The thing has several errors. For one, the thing won't accept any value that contains a letter for cnum. I don't know why. And I can't seem to figure out how to force the thing to recognize the argument 'cnum' as a string within the function call. I have to convert it into a function in the code itself. Also, I can't get the second half, the part that converts the number to the final base, to work. Either it

iOS base internationalization: change the language at runtime

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We know this is an old and painful question. If you don't know - let me briefly describe the problem. Suppose we have an application and we want to use xcode built-in localization using NSLocalizedString() - the standard way recommended by Apple. All good until you want to change the language at runtime. There is no way that you can force the application to use another language, Apple recommends always use the system language, or manually load and manage the resources (of course we don't want to do that). From here you have very few alternatives. 1) User Default [[NSUserDefaults

Is there any built-in way to convert an integer to a string (of any base) in C#?

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Convert.ToString() only allows base values of 2, 8, 10, and 16 for some odd reason; is there some obscure way of providing any base between 2 and 16? Probably to eliminate someone typing a 7 instead of an 8, since the uses for arbitrary bases are few (But not non-existent). Here is an example method that can do arbitrary base conversions. You can use it if you like, no restrictions. string ConvertToBase(int value, int toBase) { if (toBase < 2 || toBase > 36) throw new ArgumentException("toBase"); if (value < 0) throw new ArgumentException("value"); if (value == 0) return "0"; //0 would skip

C#: How do I call a static method of a base class from a static method of a derived class?

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In C#, I have base class Product and derived class Widget. Product contains a static method MyMethod(). I want to call static method Product.MyMethod() from static method Widget.MyMethod(). I can't use the base keyword, because that only works with instance methods. I can call Product.MyMethod() explicitly, but if I later change Widget to derive from another class, I have to revise the method. Is there some syntax in C# similar to base that allows me to call a static method from a base class from a static method of a derived class? static methods are basically a method to fallback from object

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