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Calling a Method From a String With the Method's Name in Ruby
How can I do what they are talking about here , but in Ruby?
4 Answers
4
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Resize image proportionally with MaxHeight and MaxWidth constraints
Using System.Drawing.Image .
3 Answers
3
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Selecting with complex criteria from pandas.DataFrame
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Sure! Setup:
>>> import pandas as pd
>>> from random import randint
>>> df = pd.DataFrame({'A': [randint(1, 9) for x in range(10)],
'B': [randint(1, 9)*10 for x in range(10)],
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How to add an extra source directory for maven to compile and include in the build jar?
...he src/main/java, I am adding a src/bootstrap directory that I want to include in my build process, in other words, I want maven to compile and include the sources there in my build. How!?
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Can I set a breakpoint on 'memory access' in GDB?
I am running an application through gdb and I want to set a breakpoint for any time a specific variable is accessed / changed. Is there a good method for doing this? I would also be interested in other ways to monitor a variable in C/C++ to see if/when it changes.
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Import a file from a subdirectory?
....org/tutorial/modules.html
In short, you need to put a blank file named
__init__.py
in the "lib" directory.
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What is the difference between Fragment and FragmentActivity?
My question is apart from the obvious inheritance differences, what are the main differences between Fragment and FragmentActivity ? To what scenarios are each class best suited? I'm trying to get an understanding of why both of these classes exist...
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How to do a git diff on moved/renamed file?
I moved a file using git mv . Now I would like to do a diff on the new file to compare it with the old file (with the old, now non-existent name).
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How to get duration, as int milli's and float seconds from ?
I'm trying to use chrono library for timers and durations.
4 Answers
4
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Using Java 8's Optional with Stream::flatMap
...latMap(Optional::stream)
.findFirst();
Java 8
Yes, this was a small hole in the API, in that it's somewhat inconvenient to turn an Optional<T> into a zero-or-one length Stream<T>. You could do this:
Optional<Other> result =
things.stream()
.map(this::resolv...