public static CharSequence drop(CharSequence self, int num)We can shorten the syntax above to the one below as we don't really pass self when invoking the method.
public static CharSequence drop(int num)
And below is the official example from the documentation.
def text = "Groovy" assert text.drop( 0 ) == 'Groovy' assert text.drop( 2 ) == 'oovy' assert text.drop( 7 ) == ''And the method is described as drops the given number of chars from the head of this CharSequence if they are available. So what this method does is to return a CharSequence consisting of all characters except the first num ones, or else an empty String, if this CharSequence has less than num characters.
Below is another example that we will wish to analyze:
def text = "James" println text.drop( 2 )
So we are removing the first two characters from James, which are Ja. So when we remove Ja from James, we get the output below
def text = "James" println text.drop( 4 )
When we remove the first four characters, which will actually remove Jame, we get below output
sIf we pass parameter equal to the number of characters, for example
def text = "James" println text.drop( 5 )We get empty String. And even if we pass a parameter greater than the length of the String
def text = "James" println text.drop( 15 )We still get empty String.