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update the documentation

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Andreas Rumpf 2018-05-01 09:38:17 +02:00
commit d62fe7d538
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doc/tut1.rst
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@ -944,12 +944,8 @@ String variables are **mutable**, so appending to a string
is possible, and quite efficient. Strings in Nim are both zero-terminated and have a is possible, and quite efficient. Strings in Nim are both zero-terminated and have a
length field. A string's length can be retrieved with the builtin ``len`` length field. A string's length can be retrieved with the builtin ``len``
procedure; the length never counts the terminating zero. Accessing the procedure; the length never counts the terminating zero. Accessing the
terminating zero is not an error and often leads to simpler code: terminating zero is an error, it only exists so that a Nim string can be converted
to a ``cstring`` without doing a copy.
.. code-block:: nim
if s[i] == 'a' and s[i+1] == 'b':
# no need to check whether ``i < len(s)``!
...
The assignment operator for strings copies the string. You can use the ``&`` The assignment operator for strings copies the string. You can use the ``&``
operator to concatenate strings and ``add`` to append to a string. operator to concatenate strings and ``add`` to append to a string.
@ -960,7 +956,7 @@ enforced. For example, when reading strings from binary files, they are merely
a sequence of bytes. The index operation ``s[i]`` means the i-th *char* of a sequence of bytes. The index operation ``s[i]`` means the i-th *char* of
``s``, not the i-th *unichar*. ``s``, not the i-th *unichar*.
String variables are initialized with the empty strings ``""``. A string variable is initialized with the empty string ``""``.
Integers Integers