def select_first(condition):
"""
Returns first item from input sequence that satisfies `condition`. Or
``None`` if none does.
>>> ['py', 'pie', 'pi'] > select_first(X.startswith('pi'))
'pie'
There is also a shortcut for ``select_first(X)`` called ``first_of``:
>>> first_of(['', None, 0, 3, 'something'])
3
>>> first_of([])
None
"""
return where(condition) | unless(StopIteration, X.next())
def select_first(condition):
"""
Returns first item from input sequence that satisfies `condition`. Or
``None`` if none does.
>>> ['py', 'pie', 'pi'] > select_first(X.startswith('pi'))
'pie'
There is also a shortcut for ``select_first(X)`` called ``first_of``:
>>> first_of(['', None, 0, 3, 'something'])
3
>>> first_of([])
None
"""
return where(condition) | unless(StopIteration, X.next())
def select_first(condition):
"""
Returns first item from input sequence that satisfies `condition`. Or
``None`` if none does.
>>> ['py', 'pie', 'pi'] > select_first(X.startswith('pi'))
'pie'
As of ``0.2.1`` you can also
:ref:`directly use regular expressions <auto-regex>` and write the above
as:
>>> ['py', 'pie', 'pi'] > select_first('^pi')
'pie'
There is also a shortcut for ``select_first(X)`` called ``first_of``:
>>> first_of(['', None, 0, 3, 'something'])
3
>>> first_of([])
None
"""
return where(condition) | unless(StopIteration, X.next())
def select_first(condition):
"""
Returns first item from input sequence that satisfies `condition`. Or
``None`` if none does.
>>> ['py', 'pie', 'pi'] > select_first(X.startswith('pi'))
'pie'
As of ``0.2.1`` you can also
:ref:`directly use regular expressions <auto-regex>` and write the above
as:
>>> ['py', 'pie', 'pi'] > select_first('^pi')
'pie'
There is also a shortcut for ``select_first(X)`` called ``first_of``:
>>> first_of(['', None, 0, 3, 'something'])
3
>>> first_of([])
None
"""
return where(condition) | unless(StopIteration, X.next())
