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How do I create a Java string from the contents of a file?
...eserving line terminators:
String content = Files.readString(path, StandardCharsets.US_ASCII);
For versions between Java 7 and 11, here's a compact, robust idiom, wrapped up in a utility method:
static String readFile(String path, Charset encoding)
throws IOException
{
byte[] encoded = Files.re...
[since C++11] std::array的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...-------------------
RUN_GTEST(ArrayTest, CStyleArray, @);
// use array<char> as a fix sized c-string.
array<char, 100> str = {0}; // all elements initialized with 0.
char *p = str.data();
strcpy(p, "hello world");
printf("%s\n", p); // hello world
END_TEST;
上...
Efficiently convert rows to columns in sql server
...ou can use the PIVOT function to transform the data from rows to columns:
select Firstname, Amount, PostalCode, LastName, AccountNumber
from
(
select value, columnname
from yourtable
) d
pivot
(
max(value)
for columnname in (Firstname, Amount, PostalCode, LastName, AccountNumber)
) piv;
S...
How to initialize a private static const map in C++?
...edef std::map<std::string, int> MyMap;
struct T {
const char* Name;
int Num;
operator MyMap::value_type() const {
return std::pair<std::string, int>(Name, Num);
}
};
static const T MapPairs[];
static const MyMap TheMap;
};
c...
Is there a splice method for strings?
...y case im working on a dynamic string so i need to specify indices and not character value .
– ProllyGeek
Dec 28 '13 at 18:11
...
How to convert a byte array to a hex string in Java?
...ly this answer, this is the function I currently use:
private static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
public static String bytesToHex(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
for (int j = 0; j < bytes.length; j++) {
int v = bytes[j] &...
How to disallow temporaries
...
How about a little hack
class Foo
{
public:
Foo (const char*) {}
};
void Foo (float);
int main ()
{
Foo ("hello"); // error
class Foo a("hi"); // OK
return 1;
}
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...
What does “%.*s” mean in printf?
...f(), rather than hard coding it into the format string, i.e.
void f(const char *str, int str_len)
{
printf("%.*s\n", str_len, str);
}
share
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improve this answer
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follow...
What is “Argument-Dependent Lookup” (aka ADL, or “Koenig Lookup”)?
...eems a bit backwards. I would expect the problem do be when std::swap() is selected rather than the overload specific to the type, A::swap(). The example with std::swap(A::MyClass&, A::MyClass&) seems misleading. since std would never have a specific overload for a user type, I don't think i...
A complete solution to LOCALLY validate an in-app receipts and bundle receipts on iOS 7
...m RMAppReceipt:
+ (NSData*)dataFromPKCS7Path:(NSString*)path
{
const char *cpath = [[path stringByStandardizingPath] fileSystemRepresentation];
FILE *fp = fopen(cpath, "rb");
if (!fp) return nil;
PKCS7 *p7 = d2i_PKCS7_fp(fp, NULL);
fclose(fp);
if (!p7) return nil;
NS...