大约有 47,000 项符合查询结果（耗时：0.0736秒） [XML]
DESTDIR and PREFIX of make
I am trying to make software install to a specific directory. I found several ways, but not sure what are the differences between them.
...
When do I use a dot, arrow, or double colon to refer to members of a class in C++?
Coming from other C-derived languages (like Java or C#) to C++, it is at first very confusing that C++ has three ways to refer to members of a class: a::b , a.b , and a->b . When do I use which one of these operators?
...
Counting Chars in EditText Changed Listener
In my project I have an EditText . I want to count the characters in the EditText , and show that number it in a TextView . I have written the following code and it works fine. However, my problem is when I click Backspace it counts up, but I need to decrement the number. How can I consider Ba...
Delete from the current cursor position to a given line number in vi editor
How do I delete a block of text from the current cursor row to a given line number in vi?
5 Answers
...
Assign multiple columns using := in data.table, by group
What is the best way to assign to multiple columns using data.table ? For example:
2 Answers
...
MFC学习总结 (90个技巧) dlg 上建立View - C/C++ - 清泛网 - 专注C++内核技术
...View1．属性页的添加：创建对话框的类，该类要从CpropertyPage继承；然后在要添加该对话框为 属性页的类(头文件)里创建CpropertySheet类的一 [page]属性页的添加[/page]1．属性页的添加：
创建对话框的类，该类要从CpropertyPage继承；...
Detecting iOS / Android Operating system
I've done some research, and this question has come up, but not in the way I intend. I'm building a page for a client that is a QR code landing, which is a place to download an application. So he doesn't have to print out 2 QR codes on a page, I'd like to detect the current operating system (Apple...
What is the difference between related SQLite data-types like INT, INTEGER, SMALLINT and TINYINT?
When creating a table in SQLite3, I get confused when confronted with all the possible datatypes which imply similar contents, so could anyone tell me the difference between the following data-types?
...
Is there an equivalent to 'continue' in a Parallel.ForEach?
I am porting some code to Parallel.ForEach and got an error with a continue I have in the code. Is there something equivalent I can use in a Parallel.ForEach functionally equivalent to continue in a foreach loop?
...
Convert data.frame column format from character to factor
I would like to change the format (class) of some columns of my data.frame object ( mydf ) from charactor to factor .
6 ...