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C# Stream流使用总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...取流
TextWriter textWriter = new StringWriter();//初始化写入流
char[] c=new char[4096];
int chars = 0;
while ((chars = textReader.Read(c, 0, 4096)) > 0)//把流中数据写入到字符数组中
{
textWriter.Write(c, 0, 4096);//从字符数组中读取流
}
string str= textWrit...
How to find list of possible words from a letter matrix [Boggle Solver]
...aster; it turns out to use regular-expression matching instead of a set of characters. Doing the same in Python about doubles the speed.
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Reasons for using the set.seed function
...
The char2seed function in the TeachingDemos package allows you to set the seed (or choose a seed to pass into set.seed) based on a character string. For example you could have students use their name as the seed then each studen...
How to get rid of punctuation using NLTK tokenizer?
...ample, you can define a tokenizer that picks out sequences of alphanumeric characters as tokens and drops everything else:
from nltk.tokenize import RegexpTokenizer
tokenizer = RegexpTokenizer(r'\w+')
tokenizer.tokenize('Eighty-seven miles to go, yet. Onward!')
Output:
['Eighty', 'seven', 'mil...
Objective-C formatting string for boolean?
...
In Objective-C, the BOOL type is just a signed char. From <objc/objc.h>:
typedef signed char BOOL;
#define YES (BOOL)1
#define NO (BOOL)0
So you can print them using the %d formatter But that will only print a 1 or a 0, not YES or NO.
Or you can...
How to determine if a string is a number with C++?
...nt way would be just to iterate over the string until you find a non-digit character. If there are any non-digit characters, you can consider the string not a number.
bool is_number(const std::string& s)
{
std::string::const_iterator it = s.begin();
while (it != s.end() && std:...
What are the rules for the “…” token in the context of variadic templates?
...ttern = z<T>(args)
}
Now if I call this function passing T as {int, char, short}, then each of the function call is expanded as:
g( arg0, arg1, arg2 );
h( x(arg0), x(arg1), x(arg2) );
m( y(arg0, arg1, arg2) );
n( z<int>(arg0), z<char>(arg1), z<short>(arg2) );
In ...
What is the meaning of “… …” token? i.e. double ellipsis operator on parameter pack
...ame T >
T const &printf_helper( T const &x )
{ return x; }
char const *printf_helper( std::string const &x )
{ return x.c_str(); }
template< typename ... Req, typename ... Given >
int wrap_printf( int (*fn)( Req... ... ), Given ... args ) {
return fn( printf_helper...
Is an array name a pointer?
...no storage is materialized for a separate pointer or any metadata. Given
char a[10];
what you get in memory is
+---+
a: | | a[0]
+---+
| | a[1]
+---+
| | a[2]
+---+
...
+---+
| | a[9]
+---+
The expression a refers to the entire array, but there's no obj...
Android Reading from an Input stream efficiently
... avoid creating new String objects on each append and to avoid copying the char arrays. The implementation for your case would be something like this:
BufferedReader r = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder total = new StringBuilder();
for (String line; (line = r.re...