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Rotating a two-dimensional array in Python
... answered Dec 7 '11 at 19:43
Andrew ClarkAndrew Clark
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List comprehension vs map
...re NOT making a lambda for the purpose, but using the same function in map and a listcomp). List comprehensions may be faster in other cases and most (not all) pythonistas consider them more direct and clearer.
An example of the tiny speed advantage of map when using exactly the same function:
$ p...
Google Maps API 3 - Custom marker color for default (dot) marker
I've seen lots of other questions similar to this ( here , here and here ), but they all have accepted answers that don't solve my problem. The best solution I have found to the problem is the StyledMarker library, which does let you define custom colours for markers, but I can't get it to use ...
How do I write stderr to a file while using “tee” with a pipe?
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I'm assuming you want to still see STDERR and STDOUT on the terminal. You could go for Josh Kelley's answer, but I find keeping a tail around in the background which outputs your log file very hackish and cludgy. Notice how you need to keep an exra FD and do cleanu...
In pure functional languages, is there an algorithm to get the inverse function?
...n algorithm to get the inverse of a function, (edit) when it is bijective? And is there a specific way to program your function so it is?
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What is android:weightSum in android, and how does it work?
I want to know: What is android:weightSum and layout weight, and how do they work?
9 Answers
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Looking for a clear definition of what a “tokenizer”, “parser” and...
I am looking for a clear definition of what a "tokenizer", "parser" and "lexer" are and how they are related to each other (e.g., does a parser use a tokenizer or vice versa)? I need to create a program will go through c/h source files to extract data declaration and definitions.
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How do I echo and send console output to a file in a bat script?
I have a batch script that executes a task and sends the output to a text file. Is there a way to have the output show on the console window as well?
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What is the difference between Lisp-1 and Lisp-2?
I have tried to understand the difference between Lisp-1 and Lisp-2 and how this relates to Clojure but I still do not understand properly. Can anyone enlighten me?
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Is there any performance gain in indexing a boolean field?
... think about it like a book. If there were only 3 kinds of words in a book and you index all of them, you would have the same number of index pages as normal pages.
There would be a performance gain if there are relatively few records of one value. For example, if you have 1000 records and 10 of t...