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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
...
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.
...
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?
...
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...
How can I concatenate regex literals in JavaScript?
...als, you can in fact concatenate them using this technique:
var regex1 = /foo/g;
var regex2 = /bar/y;
var flags = (regex1.flags + regex2.flags).split("").sort().join("").replace(/(.)(?=.*\1)/g, "");
var regex3 = new RegExp(expression_one.source + expression_two.source, flags);
// regex3 is now /foo...