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List of standard lengths for database fields

...ize for names in your database. In particular, do not assume that a four-character Japanese name in UTF-8 will fit in four bytes – you are likely to actually need 12. https://www.w3.org/International/questions/qa-personal-names For database fields, VARCHAR(255) is a safe default choic...
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Branch descriptions in Git

... with commits 6f9a332, 739453a3, b7200e8: struct branch_desc_cb { const char *config_name; const char *value; }; --edit-description:: Open an editor and edit the text to explain what the branch is for, to be used by various other commands (e.g. request-pull). Note that it won't work for...
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ListCtrl 重绘(Custom Draw) - C/C++ - 清泛网 - 专注C/C++及内核技术

...绘制的SubItem的Index值 l 正被绘制的Item的状态值(selected, grayed, 等等) l Item的LPARAM值,就是你使用CListCtrl::SetItemData所设的那个值 上述所有的信息对你来说可能都很重要,这取决于你想实现什么效果,但最经常用到...
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How to install both Python 2.x and Python 3.x in Windows

...ed Python 2.7.6. How to... Start > in the search type in environment select "Edit environment variables to your account"1 Scroll down to Path, select path, click edit. Add C:\Python27; so you should have paths to both versions of Python there, but if you don't this you can easily edit it so th...
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Unix command-line JSON parser? [closed]

... you to do powerful things really easily: cat earthporn.json | underscore select '.data .title' # [ 'Fjaðrárgljúfur canyon, Iceland [OC] [683x1024]', # 'New town, Edinburgh, Scotland [4320 x 3240]', # 'Sunrise in Bryce Canyon, UT [1120x700] [OC]', # ... # 'Kariega Game Reserve, South Afric...
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How to get default gateway in Mac OSX

...the first line; one with default at its first column. To display only the selected lines of result, we can use grep command along with netstat netstat -rn | grep 'default' This command filters and displays those lines of result having default. In this case, you can see result like following: de...
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With arrays, why is it the case that a[5] == 5[a]?

...D"[2] == *("ABCD" + 2) = *("CD") = 'C'. Dereferencing a string gives you a char, not a substring – MSalters Sep 21 '09 at 10:34  |  show 15 mo...
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Where does PostgreSQL store the database?

...e tablespaces, which might not be in that data directory, use this query. SELECT * FROM pg_tablespace; share | improve this answer | follow | ...
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Does a method's signature in Java include its return type?

...ple: public class Foo { public int myMethod(int param) {} public char myMethod(int param) {} } No, the compiler won't know the difference, as their signature: myMethod(int param) is the same. The second line: public char myMethod(int param) {} will give you can error: method is al...
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Making custom right-click context menus for my web-app

...nter; list-style-type: none; transition: all .3s ease; user-select: none; } .custom-menu li:hover { background-color: #DEF; } <!-- HTML --> <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.js"></script> &lt...