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Hiding user input on terminal in Linux script
... ss64.com/bash/read.html Silent mode. If input is coming from a terminal, characters are not echoed.
– Andreas Wong
Oct 7 '15 at 3:45
...
How to allocate aligned memory only using the standard library?
...
Original answer
{
void *mem = malloc(1024+16);
void *ptr = ((char *)mem+16) & ~ 0x0F;
memset_16aligned(ptr, 0, 1024);
free(mem);
}
Fixed answer
{
void *mem = malloc(1024+15);
void *ptr = ((uintptr_t)mem+15) & ~ (uintptr_t)0x0F;
memset_16aligned(ptr, 0, 10...
Code Golf - π day
...
In dc: 88 and 93 93 94 96 102 105 129 138 141 chars
Just in case, I am using OpenBSD and some supposedly non-portable extensions at this point.
93 chars. This is based on same formula as FORTRAN solution (slightly different results than test cases). Calculates X^2=R^2-...
How much is the overhead of smart pointers compared to normal pointers in C++?
...ude <thread>
uint32_t n = 100000000;
void t_m(void){
auto a = (char*) malloc(n*sizeof(char));
for(uint32_t i=0; i<n; i++) a[i] = 'A';
}
void t_u(void){
auto a = std::unique_ptr<char[]>(new char[n]);
for(uint32_t i=0; i<n; i++) a[i] = 'A';
}
void t_u2(void){
a...
How to convert wstring into string?
...= L"ħëłlö";
const std::locale locale("");
typedef std::codecvt<wchar_t, char, std::mbstate_t> converter_type;
const converter_type& converter = std::use_facet<converter_type>(locale);
std::vector<char> to(ws.length() * converter.max_length());
std::mbstate_t state...
mysql update column with value from another table
...
yep, INNER JOIN is perfect in this situation. I also used CONCAT_WS to merge pruduct name and SKU from another table
– vladkras
Jul 16 '14 at 5:43
2
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Stripping everything but alphanumeric chars from a string in Python
What is the best way to strip all non alphanumeric characters from a string, using Python?
11 Answers
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How to add anything in through jquery/javascript?
...
You can use innerHTML to just concat the extra field string;
document.head.innerHTML = document.head.innerHTML + '<link rel="stylesheet>...'
However, you can't guarantee that the extra things you add to the head will be recognised by the browser ...
What is The Rule of Three?
...pointers.
The person class might have looked like this:
class person
{
char* name;
int age;
public:
// the constructor acquires a resource:
// in this case, dynamic memory obtained via new[]
person(const char* the_name, int the_age)
{
name = new char[strlen(the_name...
What is Type-safe?
.... Memory** and data type (with its corresponding operations).
Memory**
A char typically requires 1 byte per character, or 8 bits (depends on language, Java and C# store unicode chars which require 16 bits).
An int requires 4 bytes, or 32 bits (usually).
Visually:
char: |-|-|-|-|-|-|-|-|
int : |...