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File I/O in Every Programming Language [closed]
This has to be a common question that all programmers have from time to time.
How do I read a line from a text file? Then the next question is always how do i write it back.
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How to get a password from a shell script without echoing
...ad secret string
read_secret()
{
# Disable echo.
stty -echo
# Set up trap to ensure echo is enabled before exiting if the script
# is terminated while echo is disabled.
trap 'stty echo' EXIT
# Read secret.
read "$@"
# Enable echo.
stty echo
trap - EXIT
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round() for float in C++
...
Boost offers a simple set of rounding functions.
#include <boost/math/special_functions/round.hpp>
double a = boost::math::round(1.5); // Yields 2.0
int b = boost::math::iround(1.5); // Yields 2 as an integer
For more information, see th...
sed: print only matching group
...> bla 1 2 3.4" | cut -d " " -f 6-7
Will result in output of:
2 3.4
-d sets the delimiter
-f selects the range of 'fields' to output, in this case, it's the 6th through 7th chunks of the original string. You can also specify the range as a list, such as 6,7.
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Pointer expressions: *ptr++, *++ptr and ++*ptr
...p is the address of a char; p tells us where in memory there is some space set aside to hold a char.
The statement also initializes p to point to the first character in the string literal "Hello". For the sake of this exercise, it's important to understand p as pointing not to the entire string, ...
What is the shortcut to Auto import all in Android Studio?
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For Windows/Linux, you can go to File -> Settings -> Editor -> General -> Auto Import -> Java and make the following changes:
change Insert imports on paste value to All
markAdd unambigious imports on the fly option as checked
On a Mac, do the same t...
DateTime format to SQL format using C#
...ssing it as a string to SQL-Server can lead to errors as it depends on the settings how the date is interpreted on the server side. In europe, we write '1.12.2012' to indicate december 1st 2012, whereas in other countries this might be treated as january 12th.
When issuing statements directly in SS...
How can I easily fixup a past commit?
...n commit.
NOTE: This script is Windows-specific; it looks for git.exe and sets the GIT_EDITOR environment variable using set. Adjust this as needed for other operating systems.
Using this script I can implement precisely the 'fix broken sources, stage fixes, run git fixup ' workflow I asked for:
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Superscript in markdown (Github flavored)?
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
...
How to print a int64_t type in C
...99 standard has integer types with bytes size like int64_t. I am using the following code:
6 Answers
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