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Why is reading lines from stdin much slower in C++ than Python?
...alse);
Normally, when an input stream is buffered, instead of reading one character at a time, the stream will be read in larger chunks. This reduces the number of system calls, which are typically relatively expensive. However, since the FILE* based stdio and iostreams often have separate implem...
How to get current path with query string using Capybara
...
I know an answer has been selected, but I just wanted to give an alternative solution. So:
To get the path and querystring, like request.fullpath in Rails, you can do:
URI.parse(current_url).request_uri.should == people_path(:search => 'name')
...
How can a string be initialized using “ ”?
... to give the constructor a string literal. You would have to initialize a char [], and then use the String(char [] src) consructor to construct the string, or you would have to read the string from a file.
– AJMansfield
Jul 5 '13 at 13:48
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Difference between VARCHAR and TEXT in MySQL [duplicate]
When we create a table in MySQL with a VARCHAR column, we have to set the length for it. But for TEXT type we don't have to provide the length.
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Python glob multiple filetypes
... not possible. you can use only:
* matches everything
? matches any single character
[seq] matches any character in seq
[!seq] matches any character not in seq
use os.listdir and a regexp to check patterns:
for x in os.listdir('.'):
if re.match('.*\.txt|.*\.sql', x):
print x
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How to send SMS in Java
... public void sendMessage(String phoneNumber, String message) {
char quotes ='"';
send("AT+CMGS="+quotes + phoneNumber +quotes+ "\r\n");
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTr...
Left padding a String with Zeros [duplicate]
...")
the second parameter is the desired output length
"0" is the padding char
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How to check if a string “StartsWith” another string?
... @cobbal Maybe. But .lastIndexOf(input, 0) compares the first N chars, whereas .substring(0, input.length) === input counts N, substrings the data to N length, and then compares those N chars. Unless there is code optimization, this second version cannot be faster than the other. Don't ge...
delete vs delete[] operators in C++
... I wonder if using delete on a new[] array of primitive types like int or char (no constructor/destructor) necessarily leads to undefined behavior, too. It seems the array size isn't stored anywhere when using primitive types.
– thomiel
Jul 6 '14 at 11:16
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Convenient C++ struct initialisation
...t;iostream>
#include <filesystem>
struct hello_world {
const char* hello;
const char* world;
};
int main ()
{
hello_world hw = {
.hello = "hello, ",
.world = "world!"
};
std::cout << hw.hello << hw.world << std::endl;
return 0;
}...