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Equation (expression) parser with precedence?
...xplanation of the algorithm I just implemented right now. Also you are not converting it to postfix which is also nice. Adding support for parenthesis is very easy too.
– Giorgi
Sep 29 '10 at 21:05
...
三个退出程序消息：WM_CLOSE、WM_DESTROY、WM_QUIT区别 - C/C++ - 清泛网 -...
...发生的时候，往往弹出一个消息框。
插播：消息框
int MessageBox(
HWND hWnd, // handle of owner window
LPCTSTR lpText, // address of text in message box
LPCTSTR lpCaption, // address of title of message box
UINT uType // style of message box
);
1. 当收到WM_CLOS...
How Python web frameworks, WSGI and CGI fit together
...rives.
The reason this is so great is that we can avoid the messy step of converting from a HTTP GET/POST to CGI to Python, and back again on the way out. It's a much more direct, clean and efficient linkage.
It also makes it much easier to have long-running frameworks running behind web servers, ...
Generics in C#, using type of a variable as parameter [duplicate]
...
The point about generics is to give compile-time type safety - which means that types need to be known at compile-time.
You can call generic methods with types only known at execution time, but you have to use reflection:
// For ...
Determine the number of NA values in a column
...ction(x) sum(is.na(x))) %>%
gather(feature, num_nulls) %>%
print(n = 100)
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Getting started with Haskell
...s SO question in case you want to test your solutions with QuickCheck (see Intermediate below).
Once you have done a few of those, you could move on to doing a few of the Project Euler problems. These are sorted by how many people have completed them, which is a fairly good indication of difficulty....
read complete file without using loop in java
...;
FileInputStream fis = new FileInputStream(file);
byte[] data = new byte[(int) file.length()];
fis.read(data);
fis.close();
String str = new String(data, "UTF-8");
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Default value of 'boolean' and 'Boolean' in Java
...es have different default values:
boolean -> false
byte, char, short, int, long -> 0
float, double -> 0.0
Note (2): void has a wrapper Void which also has a default of null and is it's only possible value (without using hacks).
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How to do a logical OR operation in shell scripting
...on't think sh supports "==". Use "=" to compare strings and -eq to compare ints.
man test
for more details.
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restrict edittext to single line
...droid:ellipsize="end"
android:layout_weight="1"
android:layout_marginTop="2dp"
android:drawablePadding="10dp"
android:background="@drawable/edittext"
android:drawableLeft="@drawable/folder_full"
android:drawableRight="@drawable/search"
android:paddingLeft="15dp"
andro...