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How to determine a Python variable's type?

... Use the type() builtin function: >>> i = 123 >>> type(i) <type 'int'> >>> type(i) is int True >>> i = 123.456 >>> type(i) <type 'float'> >>> type(i) is float True To check if a variable is of a given type, u...
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Http长连接200万尝试及调优 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...200万个,但我们设置最大文件描述符限制时,会遇到一些问题,我们在后面详细讲解。 2. 客户端的准备 由于我们需要构建大量的客户端,而我们知道,在一台系统上,连接到一个服务时的本地端口是有限的。由于端口是16位整...
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Output first 100 characters in a string

...o handle this. Here are some examples. The formatting code '%s' converts '12345' to a string, but it's already a string. >>> '%s' % '12345' '12345' '%.3s' specifies to use only the first three characters. >>> '%.3s' % '12345' '123' '%.7s' says to use the first seven charac...
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How to set up Android emulator proxy settings

... to use with a HTTP client: // proxy private static final String PROXY = "123.123.123.123"; // proxy host private static final HttpHost PROXY_HOST = new HttpHost(PROXY, 8080); HttpParams httpParameters = new BasicHttpParams(); DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters); ht...
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Save modifications in place with awk

...ace.awk include file to invoke the extension properly like so: $ cat file 123 abc 456 def 789 hij $ gawk -i inplace '{print $1}' file $ cat file 123 456 789 The variable INPLACE_SUFFIX can be used to specify the extension for a backup file: $ gawk -i inplace -v INPLACE_SUFFIX=.bak '{print $1}'...
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Unable to set data attribute using jQuery Data() API

...('#changeData').click(function() { $('#foo').data('helptext', 'Testing 123'); // $('#foo').attr('data-helptext', 'Testing 123'); console.log($('#foo').data('data-helptext')); return false; }); See demo Using the Chrome DevTools Console to inspect the DOM, the $('#foo').data('helptext...
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Error 908: Permission RECEIVE_SMS has been denied. - App Inventor 2 中...

...到错误908(权限接收短信)的讨论。一位用户遇到了这个问题,并询问是否有人知道如何解决。其他用户提供了一些可能的解决方案,包括检查应用程序权限设置、确保手机上的权限设置正确、重新编译应用程序等。有人建议检...
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How can I pass a list as a command-line argument with argparse?

...'<Required> Set flag', required=True) # Use like: # python arg.py -l 1234 2345 3456 4567 nargs='+' takes 1 or more arguments, nargs='*' takes zero or more. append parser.add_argument('-l','--list', action='append', help='<Required> Set flag', required=True) # Use like: # python arg.p...
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Should I use the datetime or timestamp data type in MySQL?

...my_datetime)") when you query the record if you want to operate on it with PHP. share | improve this answer | follow | ...
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jquery loop on Json data using $.each

... EDIT: try with this and describes what the result $.get('/Cms/GetPages/123', function(data) { alert(data); }); FOR EDIT 3: this corrects the problem, but not the idea to use "eval", you should see how are the response in '/Cms/GetPages/123'. $.get('/Cms/GetPages/123', function(data) { $....