大约有 40,000 项符合查询结果（耗时：0.0207秒） [XML]
Output first 100 characters in a string
Can seem to find a substring function in python.
8 Answers
8
...
Difference between String#equals and String#contentEquals methods
What is the difference between the String#equals method and the String#contentEquals method?
9 Answers
...
Why 0 is true but false is 1 in the shell?
...it code of 0 (the result of /bin/true). Otherwise they evaluate as false.
Strings are evaluated differently than exit codes:
if [ 0 ] ; then echo not null ; fi
if [ $(echo 0) ] ; then echo not null ; fi
if [ -z "" ] ; then echo null ; fi
The (( )) arithmetic operator interprets 1 and 0 as true ...
What does .class mean in Java?
....
object.getClass() returns the class of the given object.
For example:
String string = "hello";
System.out.println(string.getClass().toString());
This will output:
class java.lang.String
This is the class of the string object :)
...
Is there any JSON Web Token (JWT) example in C#?
...turn sha.ComputeHash(value); } } }
};
}
public static string Encode(object payload, string key, JwtHashAlgorithm algorithm)
{
return Encode(payload, Encoding.UTF8.GetBytes(key), algorithm);
}
public static string Encode(object payload, byte[] keyBytes, JwtHa...
Strings as Primary Keys in SQL Database [closed]
... slower from a performance standpoint (inserting/updating/querying) to use Strings for Primary Keys than integers?
15 Ans...
Why would one omit the close tag?
...hp closing tag (?>) is so that the programmer doesn't accidentally send extra newline chars.
The reason you shouldn't leave off the php closing tag is because it causes an imbalance in the php tags and any programmer with half a mind can remember to not add extra white-space.
So for your questi...
Stack smashing detected
...s protection variables (called canaries) which have known values. An input string of size greater than 10 causes corruption of this variable resulting in SIGABRT to terminate the program.
To get some insight, you can try disabling this protection of gcc using option -fno-stack-protector while co...
How to know what the 'errno' means?
...
You can use strerror() to get a human-readable string for the error number. This is the same string printed by perror() but it's useful if you're formatting the error message for something other than standard error output.
For example:
#include <errno.h>
#include ...
Check if a class has a member function of a given signature
...value = type::value;
};
Usage:
struct X {
int serialize(const std::string&) { return 42; }
};
struct Y : X {};
std::cout << has_serialize<Y, int(const std::string&)>::value; // will print 1
sh...