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author | Mark Whiting <mark.whiting@gmail.com> | 2014-02-17 21:07:29 -0500 |
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committer | Mark Whiting <mark.whiting@gmail.com> | 2014-02-17 21:07:29 -0500 |
commit | da3b7c3520b18bf5b94d99bcf8170d679051810a (patch) | |
tree | bec313b2e7907f3b378b93af456e9e328dc5e229 /python.html.markdown | |
parent | 5ff5f6c0d864f6ec300f14e49119d4e259dbf4be (diff) |
Better explanation of list slices
Step size and list slice syntax was not quite clear.
Upon seeing li[::-1] as it was previously, I was not sure what this really meant so I looked it up and found that this section of the guide may benefit from more explanation.
Diffstat (limited to 'python.html.markdown')
-rw-r--r-- | python.html.markdown | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/python.html.markdown b/python.html.markdown index 15f27d37..908a0638 100644 --- a/python.html.markdown +++ b/python.html.markdown @@ -160,8 +160,12 @@ li[1:3] #=> [2, 4] li[2:] #=> [4, 3] # Omit the end li[:3] #=> [1, 2, 4] +# Select every second entry +li[::2] #=>[1,4] # Revert the list li[::-1] #=> [3, 4, 2, 1] +# Use any combination of these to make advanced slices +# li[start:end:step] # Remove arbitrary elements from a list with "del" del li[2] # li is now [1, 2, 3] |