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Change Checkbox value without triggering onCheckChanged
...var listener: CompoundButton.OnCheckedChangeListener? = null
override fun setOnCheckedChangeListener(listener: CompoundButton.OnCheckedChangeListener?) {
this.listener = listener
super.setOnCheckedChangeListener(listener)
}
fun setChecked(checked: Boolean, alsoNotify: B...
How to convert a char array to a string?
...e we will lose some data. The possible solution is:
cout << string("123\0 123") << endl;
cout << string("123\0 123", 8) << endl;
Output is:
123
123 123
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C/C++ maximum stack size of program
...
Tru64 5.1: 5.2 MB
Cygwin: 1.8 MB
Solaris 7..10: 1 MB
MacOS X 10.5: 460 KB
AIX 5: 98 KB
OpenBSD 4.0: 64 KB
HP-UX 11: 16 KB
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Apply a function to every row of a matrix or a data frame
Suppose I have a n by 2 matrix and a function that takes a 2-vector as one of its arguments. I would like to apply the function to each row of the matrix and get a n-vector. How to do this in R?
...
parseInt vs unary plus, when to use which?
... '~~x',
'x>>>0',
'isNaN(x)'
];
VALUES = [
'"123"',
'"+123"',
'"-123"',
'"123.45"',
'"-123.45"',
'"12e5"',
'"12e-5"',
'"0123"',
'"0000123"',
'"0b111"',
'"0o10"',
'"0xBABE"',
'"4294967295"',
'"1...
An example of how to use getopts in bash
...pecify strength, either 45 or 90.
h | *) # Display help.
$ ./foo.sh -s 123 -p any_string
Strength needs to be either 45 or 90, 123 found instead.
p is any_string
$ ./foo.sh -s 90 -p any_string
Strength is 90.
p is any_string
See: Small getopts tutorial at Bash Hackers Wiki
...
Ruby, remove last N characters from a string?
...diomatic (and I'd argue, even more readable than other answers here):
'abc123'.delete_suffix('123') # => "abc"
'abc123'.delete_suffix!('123') # => "abc"
It's even significantly faster (almost 40% with the bang method) than the top answer. Here's the result of the same benchmark:
...
How to detect the OS from a Bash script?
... ;;
'Darwin')
OS='Mac'
;;
'SunOS')
OS='Solaris'
;;
'AIX') ;;
*) ;;
esac
You can find some practical example in my .bashrc.
Here is similar version used on Travis CI:
case $(uname | tr '[:upper:]' '[:lower:]') in
linux*)
export TRAVIS_OS_NAME=linux
;;
darwin...
How can I convert a string to a number in Perl?
...
This is a simple solution:
Example 1
my $var1 = "123abc";
print $var1 + 0;
Result
123
Example 2
my $var2 = "abc123";
print $var2 + 0;
Result
0
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How do I update Node.js?
... Operating systems supported by Node.js: Windows, Linux, MacOS, SunOS, IBM AIX
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