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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 do I handle ImeOptions' done button click?
...interact with the keyboard that pops up from bottom of screen when text is selected using the InputMethodManager. On the bottom corner of the keyboard, there is a button, typically it says "Next" or "Done", depending on the current text field. Android allows you to customize this using android:imeOp...
How to read a file in reverse order?
... while position >= 0:
qfile.seek(position)
next_char = qfile.read(1)
if next_char == "\n":
yield line[::-1]
line = ''
else:
line += next_char
position -= 1
yield line[::-1]
if __n...
Count the number of occurrences of a character in a string in Javascript
I need to count the number of occurrences of a character in a string.
33 Answers
33
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When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
...EDEDED) would give an inaccessible address under 3gb.
*/
static unsigned char _bNoMansLandFill = 0xFD; /* fill no-man's land with this */
static unsigned char _bAlignLandFill = 0xED; /* fill no-man's land for aligned routines */
static unsigned char _bDeadLandFill = 0xDD; /* fill free obj...
What's the point of malloc(0)?
...que pointer that can be passed to free"), but if you're treating this as a char*, that may give you an invalid, non-terminated char. It could be dangerous to rely on this in cross-platform situations.
– Reed Copsey
Jan 7 '10 at 17:51
...
[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...
Remove all special characters from a string [duplicate]
...t titles that could contain anything and have them stripped of all special characters so they only have letters and numbers and of course I would like to replace spaces with hyphens.
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Can we make unsigned byte in Java
... for the `unsignedByte` variable,
* i.e. `short`, `int`, `long` and even `char`, but during bitwise operations
* it would get casted to `int` anyway.
*/
void printUnsignedByte(byte b) {
int unsignedByte = b & 0xFF;
System.out.println(unsignedByte); // "200"
}
...
Test whether string is a valid integer
...sonably elegant) way of doing this - I don't want to have to pick it apart char by char.
11 Answers
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