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Detect encoding and make everything UTF-8
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If you apply utf8_encode() to an already UTF-8 string, it will return garbled UTF-8 output.
I made a function that addresses all this issues. It´s called Encoding::toUTF8().
You don't need to know what the encoding of your strings is. It ...
Create a pointer to two-dimensional array
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Here you wanna make a pointer to the first element of the array
uint8_t (*matrix_ptr)[20] = l_matrix;
With typedef, this looks cleaner
typedef uint8_t array_of_20_uint8_t[20];
array_of_20_uint8_t *matrix_ptr = l_matrix;
Then you can enjoy life again :)
matrix_ptr[0][1] = ...;
Beware o...
What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort
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86
General numeric sort compares the numbers as floats, this allows scientific notation eg 1.234E1...
What's the difference between utf8_general_ci and utf8_unicode_ci?
Between utf8_general_ci and utf8_unicode_ci , are there any differences in terms of performance?
8 Answers
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What is Bit Masking?
...Result: 00000101b
Masking is implemented using AND, so in C we get:
uint8_t stuff(...) {
uint8_t mask = 0x0f; // 00001111b
uint8_t value = 0x55; // 01010101b
return mask & value;
}
Here is a fairly common use-case: Extracting individual bytes from a larger word. We define the high...
C pointer to array/array of pointers disambiguation
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int* arr[8]; // An array of int pointers.
int (*arr)[8]; // A pointer to an array of integers
The third one is same as the first.
The general rule is operator precedence. It can get even much more complex as function pointers come ...
Regex to validate password strength
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438
You can do these checks using positive look ahead assertions:
^(?=.*[A-Z].*[A-Z])(?=.*[!@#$&a...
What MySQL data type should be used for Latitude/Longitude with 8 decimal places?
I'm working with map data, and the Latitude/Longitude extends to 8 decimal places. For example:
8 Answers
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presentModalViewController:Animated is deprecated in ios6
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answered Apr 8 '13 at 8:03
VishalVishal
8,19655 gold badges3333 silver badges5252 bronze badges
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iterating over each character of a String in ruby 1.8.6 (each_char)
...on each character separately from a base String in ruby. I am using ruby 1.8.6 and would like to do something like:
5 Answe...