大约有 45,000 项符合查询结果（耗时：0.0983秒） [XML]
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.al
...understood way to evaluate
an array in boolean context: it could mean True if any element is
True, or it could mean True if all elements are True, or True if the array has non-zero length, just to name three possibilities.
Since different users might have different needs and different assumptions, ...
How do I record audio on iPhone with AVAudioRecorder?
Now that iPhone 3.0 SDK is public, I think I can ask this question for those of you that have already been playing with the 3.0 SDK. I want to record audio in my application, but I want to use AVAudioRecorder and not the older way of recording like the example SpeakHere shows. There are not any...
How to enter in a Docker container already running with a new TTY
...er exec -it will eventually provide a fully-functional pseudo tty, but for now (Docker version 1.9.1), there are some shortcomings : github.com/docker/docker/issues/8755
– blong
Jan 5 '16 at 3:11
...
jQuery Validate - Enable validation for hidden fields
...ge should make the setup of forms with hidden elements
easier, these are now ignored by default (option “ignore” has
“:hidden” now as default). In theory, this could break an existing
setup. In the unlikely case that it actually does, you can fix it by
setting the ignore-option to ...
How to install a plugin in Jenkins manually
...I do not recommend it and I am down-voting for this reason. Please let me know if I am mistaken and I will undo my down-vote.
– Farrukh Najmi
Feb 17 '17 at 20:21
9
...
How to write to an existing excel file without overwriting data (using pandas)?
...s writer.sheets to access the sheet.
## If you leave it empty it will not know that sheet Main is already there
## and will create a new sheet.
writer.sheets = dict((ws.title, ws) for ws in book.worksheets)
data_filtered.to_excel(writer, "Main", cols=['Diff1', 'Diff2'])
writer.save()
...
How do I dump an object's fields to the console?
...l, but it can be really useful when debugging. Ruby will fall back to to_s if it can't find an inspect` method.
– the Tin Man
Nov 27 '10 at 21:45
...
What are the differences between a multidimensional array and an array of arrays in C#?
What are the differences between multidimensional arrays double[,] and array-of-arrays double[][] in C#?
9 Answers
...
Why use strict and warnings?
It seems to me that many of the questions in the Perl tag could be solved if people would use:
8 Answers
...
Remove Identity from a column in a table
...'MyTable2', 'MyIndex2', etc.
Remove the IDENTITY specification.
You should now have two "identical"-ish tables, one full, the other empty with no IDENTITY.
Run ALTER TABLE [Original] SWITCH TO [Original2]
Now your original table will be empty and the new one will have the data. You have switched th...