大约有 40,000 项符合查询结果(耗时:0.0486秒) [XML]

https://stackoverflow.com/ques... 

jQuery Ajax File Upload

...t;File Upload</td> </tr> <tr> <th>Select File </th> <td><input id="csv" name="csv" type="file" /></td> </tr> <tr> <td colspan="2"> <input type="submit" value="submit"/> &...
https://stackoverflow.com/ques... 

Comparing object properties in c# [closed]

...e && (selfValue == null || !selfValue.Equals(toValue)) select selfValue; return !unequalProperties.Any(); } return self == to; } public static class TypeExtensions { /// <summary> /// Determine whether a type is simple (String, Decimal, DateT...
https://stackoverflow.com/ques... 

Split comma-separated strings in a column into separate rows

... occasions, because the datatable approaches only produce tables with the "selected" columns, while dplyr produces a result with all the columns (including the ones not involved in the analysis and without having to write their names in the function). – Ferroao ...
https://stackoverflow.com/ques... 

How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?

...', '2014-08-20 18:47:42'); Query OK, 2 rows affected (0.04 sec) mysql> SELECT * FROM test; +----+------+---------------------+ | id | data | ts | +----+------+---------------------+ | 1 | New | 2014-08-20 18:47:42 | +----+------+---------------------+ 1 row in set (0.00 sec) ...
https://stackoverflow.com/ques... 

Two versions of python on linux. how to make 2.7 the default

...n in /usr/bin, and may have scripts that depend on this being present, and selected by #! /usr/bin/env python. You can usually get away with running Python 2.6 scripts in 2.7, but do you want to risk it? On top of that, monkeying with /usr/bin can break your package manager's ability to manage pack...
https://stackoverflow.com/ques... 

Use C++ with Cocoa Instead of Objective-C?

...ving it an extension of .mm, or by right-clicking on the file in Xcode and selecting Get Info > General then changing the File Type to sourcecode.cpp.objcpp. The second option is useful if you have a .cpp file where you want to use Objective-C within a Mac-specific #ifdef. ...
https://stackoverflow.com/ques... 

JavaScript for detecting browser language preference [duplicate]

...t language the user uses you could always ask him by adding on your site a select list and save its choice into a cookie. – Marco Demaio Mar 21 '13 at 17:13 10 ...
https://stackoverflow.com/ques... 

Can I create more than one repository for github pages?

...ured the master branch in a repository setting --> GitHub pages section select Source as master (or any other branch you want). You will get site link in the same section, in my screen shot I have removed site link. sh...
https://stackoverflow.com/ques... 

Deserialize JSON into C# dynamic object?

...st<object>(arrayList.Cast<IDictionary<string, object>>().Select(x => new DynamicJsonObject(x))) : new List<object>(arrayList.Cast<object>()); } return result; } } #endregion } You can use it like this: ...
https://stackoverflow.com/ques... 

What is the difference between UTF-8 and Unicode?

...r wants to use. Also, when a text editor program reads a file, it needs to select a text encoding scheme to decode it correctly. Same goes when you are typing and entering a letter, the text editor needs to know what scheme you use so that it will save it correctly. – Cheng ...