Re: convert to python code
On Wed, 23 Dec 2015 03:14 pm, Rodrick Brown wrote: > Tried a few things but can't seem to get it right any help ? > > let times = (...matrices) => > > matrices.reduce( > > ([a,b,c], [d,e,f]) => [a*d + b*e, a*e + b*f, b*e + c*f] > > ); Are you expecting us to guess what language this is written in, decipher what it does, and write Python code to do the same thing? How about if you tell us the language and explain what it does? -- Steven -- https://mail.python.org/mailman/listinfo/python-list
convert to python code
Tried a few things but can't seem to get it right any help ? let times = (...matrices) => matrices.reduce( ([a,b,c], [d,e,f]) => [a*d + b*e, a*e + b*f, b*e + c*f] ); -- https://mail.python.org/mailman/listinfo/python-list
Re: convert to python code
Rodrick Brown <rodrick.br...@gmail.com> writes: > Tried a few things but can't seem to get it right any help ? To convert it to Python code, you'll need to actually write some code. Please show here in this forum the actual Python code which is not behaving how you want, and say *exactly* what it's doing different from what you expect (and, preferably, explain why you expect it to behave differently). -- \ “Do I believe in God? … without clarification of a kind I have | `\never seen, I don’t know whether I believe or don’t believe in | _o__)whatever a questioner has in mind.” —Noam Chomsky | Ben Finney -- https://mail.python.org/mailman/listinfo/python-list
Re: Convert some Python code to C++
[EMAIL PROTECTED] a écrit : For those that understand algorithms and can talk Python, I want to convert the Python code in the section Reading out all LCSs into C++ code but I don't understand some of the syntax. Can anyone give me a hand? def backTrackAll(C, X, Y, i, j): if i == 0 or j == 0: return set([]) elif X[i-1] == Y[j-1]: return set([Z + X[i-1] for Z in backTrackAll(C, X, Y, i-1, j-1)]) else: R = set() if C[i][j-1] = C[i-1][j]: R.update(backTrackAll(C, X, Y, i, j-1)) if C[i-1][j] = C[i][j-1]: R.update(backTrackAll(C, X, Y, i-1, j)) return R Thanks! just have a look at this tutorial: and look for Lists and Sets http://docs.python.org/tut/tut.html and look in the reference index for set() and list() in http://docs.python.org/lib/genindex.html or just pick the algo in another language in the url you give or tell us precisely what part of the python algo you do not understant! -- http://mail.python.org/mailman/listinfo/python-list
Convert some Python code to C++
I am working on an implementation of the Longest Common Subsequence problem (as I understand it, this problem can be used in spell checking type activities) and have used this site to understand the problem and its solution: http://en.wikibooks.org/wiki/Algorithm_implementation/Strings/Longest_common_subsequence For those that understand algorithms and can talk Python, I want to convert the Python code in the section Reading out all LCSs into C++ code but I don't understand some of the syntax. Can anyone give me a hand? Here is the code from that section, but is probably of little use without understanding the entire problem setup given at the site above: def backTrackAll(C, X, Y, i, j): if i == 0 or j == 0: return set([]) elif X[i-1] == Y[j-1]: return set([Z + X[i-1] for Z in backTrackAll(C, X, Y, i-1, j-1)]) else: R = set() if C[i][j-1] = C[i-1][j]: R.update(backTrackAll(C, X, Y, i, j-1)) if C[i-1][j] = C[i][j-1]: R.update(backTrackAll(C, X, Y, i-1, j)) return R Thanks! -- http://mail.python.org/mailman/listinfo/python-list
Re: Convert some Python code to C++
On Nov 13, 9:28 am, [EMAIL PROTECTED] wrote: I am working on an implementation of the Longest Common Subsequence problem (as I understand it, this problem can be used in spell checking type activities) and have used this site to understand the problem and its solution: http://en.wikibooks.org/wiki/Algorithm_implementation/Strings/Longest... For those that understand algorithms and can talk Python, I want to convert the Python code in the section Reading out all LCSs into C++ code but I don't understand some of the syntax. Can anyone give me a hand? Here is the code from that section, but is probably of little use without understanding the entire problem setup given at the site above: def backTrackAll(C, X, Y, i, j): if i == 0 or j == 0: return set([]) elif X[i-1] == Y[j-1]: return set([Z + X[i-1] for Z in backTrackAll(C, X, Y, i-1, j-1)]) else: R = set() if C[i][j-1] = C[i-1][j]: R.update(backTrackAll(C, X, Y, i, j-1)) if C[i-1][j] = C[i][j-1]: R.update(backTrackAll(C, X, Y, i-1, j)) return R Thanks! You might try Shed Skin: http://sourceforge.net/projects/shedskin/ It's been a while since I did C++. I would recommend going through a basic C++ tutorial. I'm pretty sure the equivalence operators are almost the same. You'll likely need to declare the types for the arguments passed into the function as well. I think lists are called arrays in C++. I don't know what the set equivalent is though. Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: Convert some Python code to C++
On 2007-11-13, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: On Nov 13, 9:28 am, [EMAIL PROTECTED] wrote: I am working on an implementation of the Longest Common Subsequence problem (as I understand it, this problem can be used in spell checking type activities) and have used this site to understand the problem and its solution: http://en.wikibooks.org/wiki/Algorithm_implementation/Strings/Longest... For those that understand algorithms and can talk Python, I want to convert the Python code in the section Reading out all LCSs into C++ code but I don't understand some of the syntax. Can anyone give me a hand? Here is the code from that section, but is probably of little use without understanding the entire problem setup given at the site above: def backTrackAll(C, X, Y, i, j): if i == 0 or j == 0: return set([]) elif X[i-1] == Y[j-1]: return set([Z + X[i-1] for Z in backTrackAll(C, X, Y, i-1, j-1)]) else: R = set() if C[i][j-1] = C[i-1][j]: R.update(backTrackAll(C, X, Y, i, j-1)) if C[i-1][j] = C[i][j-1]: R.update(backTrackAll(C, X, Y, i-1, j)) return R Thanks! You might try Shed Skin: http://sourceforge.net/projects/shedskin/ It's been a while since I did C++. I would recommend going through a basic C++ tutorial. I'm pretty sure the equivalence operators are almost the same. You'll likely need to declare the types for the arguments passed into the function as well. I think lists are called arrays in C++. I don't know what the set equivalent is though. It is called set, oddly enough. ;) There's an overload of the set::insert function that takes a couple of iterators that will serve for Python's update method. -- Neil Cerutti -- http://mail.python.org/mailman/listinfo/python-list
Re: Convert some Python code to C++
On Nov 13, 12:51 pm, Neil Cerutti [EMAIL PROTECTED] wrote: On 2007-11-13, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: On Nov 13, 9:28 am, [EMAIL PROTECTED] wrote: I am working on an implementation of the Longest Common Subsequence problem (as I understand it, this problem can be used in spell checking type activities) and have used this site to understand the problem and its solution: http://en.wikibooks.org/wiki/Algorithm_implementation/Strings/Longest... For those that understand algorithms and can talk Python, I want to convert the Python code in the section Reading out all LCSs into C++ code but I don't understand some of the syntax. Can anyone give me a hand? Here is the code from that section, but is probably of little use without understanding the entire problem setup given at the site above: def backTrackAll(C, X, Y, i, j): if i == 0 or j == 0: return set([]) elif X[i-1] == Y[j-1]: return set([Z + X[i-1] for Z in backTrackAll(C, X, Y, i-1, j-1)]) else: R = set() if C[i][j-1] = C[i-1][j]: R.update(backTrackAll(C, X, Y, i, j-1)) if C[i-1][j] = C[i][j-1]: R.update(backTrackAll(C, X, Y, i-1, j)) return R Thanks! You might try Shed Skin: http://sourceforge.net/projects/shedskin/ It's been a while since I did C++. I would recommend going through a basic C++ tutorial. I'm pretty sure the equivalence operators are almost the same. You'll likely need to declare the types for the arguments passed into the function as well. I think lists are called arrays in C++. I don't know what the set equivalent is though. It is called set, oddly enough. ;) There's an overload of the set::insert function that takes a couple of iterators that will serve for Python's update method. -- Neil Cerutti I suspected as much, but I don't think they ever got that far into C++ in the classes I took. I'll have to file that little nugget for future reference. Hopefully the OP is getting something out of this as well. Mike -- http://mail.python.org/mailman/listinfo/python-list
