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How to “perfectly” override a dict?
...reventing pickling from working, and do I need to implement
__setstate__ etc?
Do I need repr, update and __init__?
Should I just use mutablemapping (it seems one shouldn't use UserDict
or DictMixin)? If so, how? The docs aren't exactly enlightening.
The accepted answer would be my first...
Rails: How to change the text on the submit button in a Rails Form
... is not acceptable because of used text or you need additionally add class etc., so you can directly override value:
<%= f.submit class: 'btn btn-primary', value: 'Login' %>
or:
<%= f.button :submit, class: 'btn btn-primary', value: 'Login' %>
By the way it was mentioned by @cassi....
Finding diff between current and last version
... Use git show HEAD~1 to show the last-but-one commit, and git show HEAD~2, etc. for older commits. Show just a single file via git show HEAD~2 my_file.
– Florian Brucker
Mar 3 '16 at 10:43
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Server is already running in Rails
...l the running process
$ kill -9 5946
$ rm tmp/server.pids
foreman start etc start the service
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is there a Java equivalent to null coalescing operator (??) in C#? [duplicate]
...make sense conceptually. However, the wrapper classes (Integer, Character, etc.), as well as any other instantiable class can be null.
Besides that fact, there isn't any short-hand syntax for a null coalescing operator. You must use the expanded form.
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How to sort a file, based on its numerical values for a field?
...d be more advisable. This further allows scientific notation e.g. 1.234E10 etc.
– Herpes Free Engineer
Apr 4 '18 at 11:20
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Difference between java.io.PrintWriter and java.io.BufferedWriter?
...king about IOException, in that every other IO abstraction (Reader, Writer etc) declares that its methods throw IOException if something goes wrong - PrintWriter doesn't.
– Jon Skeet
May 27 '19 at 5:42
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Copying files into the application folder at compile time
... are macro values for frequently used things like project path, item name, etc.
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Using Java with Nvidia GPUs (CUDA)
...example could be when many complex trigonometric computations (sine/cosine etc) are performed on "few" data elements.
As a rule of thumb: You can assume that reading/writing one data element from the "main" GPU memory has a latency of about 500 instructions....
Therefore, another key point for th...
Java RegEx meta character (.) and ordinary dot?
...ep it means "word boundary".
So write -?\d+\.\d+\$ to match 1.50$, -2.00$ etc. and [(){}[\]] for a character class that matches all kinds of brackets/braces/parentheses.
If you need to transform a user input string into a regex-safe form, use java.util.regex.Pattern.quote.
Further reading: Jan Go...