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How to map with index in Ruby?
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Here are two more options for 1.8.6 (or 1.9) without using enumerator:
# Fun with functional
arr = ('a'..'g').to_a
arr.zip( (2..(arr.length+2)).to_a )
#=> [["a", 2], ["b", 3], ["c", 4], ["d", 5], ["e", 6], ["f", 7], ["g", 8]]
# The simplest
n = 1
arr.map{ |c| [c, n+=1 ] }
#=> [["a", 2], ["b...
How can I iterate over an enum?
...b = 220,
c = -1
};
static const Type All[] = { a, b, c };
}
void fun( const MyEnum::Type e )
{
std::cout << e << std::endl;
}
int main()
{
// all
for ( const auto e : MyEnum::All )
fun( e );
// some
for ( const auto e : { MyEnum::a, MyEnum::b } )
fun( e );
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How to get the function name from within that function?
How can I access a function name from inside that function?
20 Answers
20
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Count number of rows within each group
...count the number of rows within each group. I reguarly use the aggregate function to sum data as follows:
14 Answers
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Android ClickableSpan not calling onClick
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Kotlin util function:
fun setClickable(textView: TextView, subString: String, handler: () -> Unit, drawUnderline: Boolean = false) {
val text = textView.text
val start = text.indexOf(subString)
val end = start + subString...
Why should I avoid std::enable_if in function signatures
...+11.
He wrote that one item in the book could be "Avoid std::enable_if in function signatures" .
3 Answers
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Interview question: Check if one string is a rotation of other string [closed]
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Here's one using regex just for fun:
boolean isRotation(String s1, String s2) {
return (s1.length() == s2.length()) && (s1 + s2).matches("(.*)(.*)\\2\\1");
}
You can make it a bit simpler if you can use a special delimiter character guaranteed...
I have an error: setOnItemClickListener cannot be used with a spinner, what is wrong?
...ectedListener = object : AdapterView.OnItemSelectedListener {
override fun onItemSelected(parent: AdapterView<*>, view: View, position: Int, id: Long) {
print("onItemSelected position = $position id = $id")
}
override fun onNothingSelected(parent: AdapterView<*>) {
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How can I convert a hex string to a byte array? [duplicate]
Can we convert a hex string to a byte array using a built-in function in C# or do I have to make a custom method for this?
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