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Should I inherit from std::exception?

...s no way to pass a message to std::exception. std::runtime_error accepts a string and is derived from std::exception. – Martin York Nov 3 '09 at 19:59 14 ...
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SQL SELECT WHERE field contains words

... Note that if you use LIKE to determine if a string is a substring of another string, you must escape the pattern matching characters in your search string. If your SQL dialect supports CHARINDEX, it's a lot easier to use it instead: SELECT * FROM MyTable WHERE CHARI...
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Scraping html tables into R data frames using the XML package

... I get an error "Scripts should use an informative User-Agent string with contact information, or they may be IP-blocked without notice." [2] " Is there a way round this to implement this method? – pssguy Jan 17 '12 at 20:59 ...
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Using a remote repository with non-standard port

... How can this be done if I have an IP and not a host name? I ask because we haven't linked our host name to our ip yet. – ThisIsNotAnId Feb 22 '19 at 23:14 ...
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How do I assign an alias to a function name in C++?

... Example: there are two overloads of function std::stoi int stoi (const string&, size_t*, int); int stoi (const wstring&, size_t*, int); If you want to make an alias to the first version you should use the following: const auto& new_fn_name = static_cast<int(*)(const string&...
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OpenSSL and error in reading openssl.conf file

...eys default_md = md5 # message digest algorithm string_mask = nombstr # permitted characters distinguished_name = req_distinguished_name req_extensions = v3_req [ req_distinguished_name ] # Variable name Prompt string #-...
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How to Copy Text to Clip Board in Android?

...hod to copy text to clipboard: private void setClipboard(Context context, String text) { if(android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.HONEYCOMB) { android.text.ClipboardManager clipboard = (android.text.ClipboardManager) context.getSystemService(Context.CLIPBOARD_SE...
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Command-line Unix ASCII-based charting / plotting tool

Is there a good command-line UNIX charting / graphing / plotting tool out there? I'm looking for something that will plot xy points on an ASCII graph. ...
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How do I increase the RAM and set up host-only networking in Vagrant?

...nage-modifyvm The vagrant documentation has the section on how to change IP address: Vagrant::Config.run do |config| config.vm.network :hostonly, "192.168.50.4" end Also you can restructure the configuration like this, ending is do with end without nesting it. This is simpler. config.vm.defi...
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关于php的socket初探 - PHP - 清泛IT论坛,有思想、有深度

...明,都是将socket称作"套接字",也就是对底层tcp/ip的一种封装,所以要想真正理解socket的原理,就得去深入理解tcp/ip实现网络通信的机制,这属于计算机网络这块的东西,与实际的编程没有太大的关联,这里就不深入说明...