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How to check whether a file is empty or not?
...irst_char:
... print "file is empty" #first character is the empty string..
... else:
... my_file.seek(0) #first character wasn't empty, return to start of file.
... #use file now
...
file is empty
...
Difference between int32, int, int32_t, int8 and int8_t
...ktop/server machines, it probably won't be.
Oops -- missed the part about char. You'd use int8_t instead of char if (and only if) you want an integer type guaranteed to be exactly 8 bits in size. If you want to store characters, you probably want to use char instead. Its size can vary (in terms of ...
How do I provide custom cast support for my class?
...c# but note that from that example, using the explicit method, if you do:
string name = "Test";
Role role = (Role) name;
Then everything is fine; however, if you use:
object name = "Test";
Role role = (Role) name;
You will now get an InvalidCastException because string cannot be cast to Role, ...
Parse query string in JavaScript [duplicate]
I need to parse the query string www.mysite.com/default.aspx?dest=aboutus.aspx .
How do I get the dest variable in JavaScript?
...
Is there a command to refresh environment variables from the command prompt in Windows?
...
And annoyingly, extra instances of cmd.exe don't count. They all have to be killed before the change is reflected in any new cmd.exe's.
– Mike F
Oct 5 '08 at 8:08
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What does it mean by buffer?
...ample. In a C program, for example, you might have:
#define BUFSIZE 1024
char buffer[BUFSIZE];
size_t len = ;
// ... later
while((len=read(STDIN, &buffer, BUFSIZE)) > 0)
write(STDOUT, buffer, len);
... which is a minimal version of cp(1). Here, the buffer array is used to store the ...
Method to Add new or update existing item in Dictionary
...work fine in multi-threaded context. It however is not thread-safe without extra synchronization.
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SQL SERVER: Get total days between two dates
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It also proceeds datetime and datetime2 like a charm as I can see in my results.
– Honza P.
Feb 28 at 8:40
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c语言字符串常量内容是否可以通过指针修改 - C/C++ - 清泛网 - 专注C/C++及内核技术
...是：不行。尝试修改的话，运行时程序会崩溃。int main(){ char str1[40]="hello world!"; char *str1="hello world!"...答案是：不行。尝试修改的话，运行时程序会崩溃。
int main()
{
char str1[40]="hello world!"; //char *str1="hello world!";
str1[4]...
AfxIsValidAddress 测试内存地址 - C/C++ - 清泛网 - 专注C/C++及内核技术
...不仅限于模块分配新的地址。
Example
// Allocate a 5 character array, which should have a valid memory address.
char* arr = new char[5];
// Create a null pointer, which should be an invalid memory address.
char* null = (char*)0x0;
ASSERT(AfxIsValidAddress(arr, 5));
ASSER...