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Python argparse: default value or specified value
...e default and since I need to do some ops, I have something like this self.foo = (args.bar or some_else_source).upper(). It will break on None object AFAIUC.
– 0andriy
Aug 12 '19 at 14:02
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Best way to create custom config options for my Rails app?
...ocument describes config_for method as:
Convenience for loading config/foo.yml for the current Rails env.
If you do not want to use a yaml file
As Rails official guide says:
You can configure your own code through the Rails configuration object with custom configuration under the config...
Java Immutable Collections
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Collection<String> c1 = new ArrayList<String>();
c1.add("foo");
Collection<String> c2 = Collections.unmodifiableList(c1);
c1 is mutable (i.e. neither unmodifiable nor immutable).
c2 is unmodifiable: it can't be changed itself, but if later on I change c1 then that change wi...
Case conventions on element names?
... <ParentElement attributeId="1">
<ChildElement attributeName="foo" />
</ParentElement>
</Root>
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Replacement for “rename” in dplyr
...etNames() if you're replacing the column names wholesale: df %>% mutate(foo = 1 +2) %>% setNames(c("blah", "blu", "bar"))
– crazybilly
Jun 20 '17 at 13:22
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Can you use reflection to find the name of the currently executing method?
... help in some scenarios (but really in say the example above)
public void Foo ([CallerMemberName] string methodName = null)
This seemed to be mainly a solution for INotifyPropertyChanged support where previously you had strings littered all through your event code.
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What is the idiomatic Go equivalent of C's ternary operator?
...e in the language for some syntactic sugar that is a potential readability footgun. Go is designed for reading, and while most C-developers may be familiar enough with ternaries to be able to read them quickly enough, this is not a universal truth, and things go really south when people start nestin...
Format a Go string without printing?
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Sprintf is what you are looking for.
Example
fmt.Sprintf("foo: %s", bar)
You can also see it in use in the Errors example as part of "A Tour of Go."
return fmt.Sprintf("at %v, %s", e.When, e.What)
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Update or Insert (multiple rows and columns) from subquery in PostgreSQL
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SET col1 = subquery.col2,
col2 = subquery.col3
FROM (
SELECT t2.foo as col1, t3.bar as col2, t3.foobar as col3
FROM table2 t2 INNER JOIN table3 t3 ON t2.id = t3.t2_id
WHERE t2.created_at > '2016-01-01'
) AS subquery
WHERE table1.id = subquery.col1;
...
What code analysis tools do you use for your Java projects? [closed]
...le format for homogenizing reports. For example:
/project/src/com/example/Foo.java:425:9: warning(Checkstyle):Missing a Javadoc comment.
My warning format transformations are done by my Ant script with Ant filterchains.
The second "integration" that I do is for warning suppression. By default, ea...