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Q:
How can I use str.find() and str.lstrip() together?
str.find(search_string) can help me find the location of a substring in a string.
If I find the first occurrence of search_string, I can use str.lstrip() to remove leading and trailing white space.
Is there a way to do both at once? E.g., what if I want to find the location and remove leading/trailing white space at the same time?
A:
You can combine both with a list of arguments:
>>> s = 'abc defghij'
>>> s.find('ghi', 1, s.lstrip())
8
>>> s.lstrip().find('ghi')
5
This will return the index of the second occurrence of the substring as well.
A:
A simple variant of what @Cᴏʀɪᴇʟ suggested:
>>> s = 'abc defghij'
>>> s[s.lstrip().find('ghi')]
'defghij'
(i.e., s.lstrip().find('ghi') returns the position of the first 'ghi' in s)
Q:
Is it a new convention to insert null in the array of an interface?
Is this convention valid in Go?
type InterfaceImpl2 interface {
ImplementInterface1() interface{}
}
type InterfaceImpl1 interface {
ImplementInterface2() InterfaceImpl2
}
func (i InterfaceImpl2) ImplementInterface1() interface{} {
return nil
}
func (i InterfaceImpl1) ImplementInterface2() InterfaceImpl2 {
return nil
}
type be359ba680
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