大约有 22,000 项符合查询结果（耗时：0.0333秒） [XML]
sizeof single struct member in C
...->member)
and use it like this:
typedef struct
{
float calc;
char text[255];
int used;
} Parent;
typedef struct
{
char flag;
char text[member_size(Parent, text)];
int used;
} Child;
I'm actually a bit surprised that sizeof((type *)0)->member) is even allowed as a ...
Identify if a string is a number
If I have these strings:
25 Answers
25
...
How to send emails from my Android application?
...N_SEND);
i.setType("message/rfc822");
i.putExtra(Intent.EXTRA_EMAIL , new String[]{"recipient@example.com"});
i.putExtra(Intent.EXTRA_SUBJECT, "subject of email");
i.putExtra(Intent.EXTRA_TEXT , "body of email");
try {
startActivity(Intent.createChooser(i, "Send mail..."));
} catch (android.c...
Semicolon before self-invoking function? [duplicate]
...: there isn't one! (Learn only one rule and you too can enjoy life without extra semicolons ;-)
Since I write in a semicolon-free style I thus always write it as (where the function-expression can naturally span multiple lines):
;(FunctionExpression)()
In my case it isn't about "safety" or try...
What is the email subject length limit?
...56 is any better than 250, or 300, or 372. We're long past using bytes for string lengths.
– Greg Hewgill
Oct 20 '09 at 3:46
4
...
Use email address as primary key?
...
String comparison is slower than int comparison. However, this does not matter if you simply retrieve a user from the database using the e-mail address. It does matter if you have complex queries with multiple joins.
If you ...
Simple example of threading in C++
...reate a function that you want the thread to execute, eg:
void task1(std::string msg)
{
std::cout << "task1 says: " << msg;
}
Now create the thread object that will ultimately invoke the function above like so:
std::thread t1(task1, "Hello");
(You need to #include <thread>...
Case insensitive 'Contains(string)'
...
To test if the string paragraph contains the string word (thanks @QuarterMeister)
culture.CompareInfo.IndexOf(paragraph, word, CompareOptions.IgnoreCase) >= 0
Where culture is the instance of CultureInfo describing the language that t...
How to create CSV Excel file C#? [closed]
...bjects)
{
Objects = objects;
}
public string Export()
{
return Export(true);
}
public string Export(bool includeHeaderLine)
{
StringBuilder sb = new StringBuilder();
//Get properties using refl...
How to split a string in shell and get the last field
Suppose I have the string 1:2:3:4:5 and I want to get its last field ( 5 in this case). How do I do that using Bash? I tried cut , but I don't know how to specify the last field with -f .
...