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How to define custom configuration variables in rails
...swer:
For a quick solution, watching the "YAML Configuration File" screen cast by Ryan Bates should be very helpful.
In summary:
# config/initializers/load_config.rb
APP_CONFIG = YAML.load_file("#{Rails.root}/config/config.yml")[Rails.env]
# application.rb
if APP_CONFIG['perform_authentication']...
Converting JSONarray to ArrayList
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I think it's not possible to cast ArrayList<Object> to ArrayList<String>
– Vasilii Suricov
Feb 2 '17 at 19:03
1
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Type converting slices of interfaces
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Try interface{} instead. To cast back as slice, try
func foo(bar interface{}) {
s := bar.([]string)
// ...
}
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Add and Remove Views in Android Dynamically?
...ViewParents in general can't remove views, but ViewGroups can. You need to cast your parent to a ViewGroup (if it is a ViewGroup) to accomplish what you want.
For example:
View namebar = View.findViewById(R.id.namebar);
((ViewGroup) namebar.getParent()).removeView(namebar);
Note that all Layout...
Why is 'this' a pointer and not a reference?
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@Omnifarious you could write &reinterpret_cast<char&>(this); to get the real address for overloading operator& (in fact, this is sort of what boost::addressof does).
– Johannes Schaub - litb
Jul 1 '10 at 22:57
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How to avoid warning when introducing NAs by coercion
...Not the answer you're looking for? Browse other questions tagged r parsing casting na or ask your own question.
Can I Set “android:layout_below” at Runtime Programmatically?
...ike shortening code to 1 line, it makes it harder to read, especially when casting is involved. Plus doing it my way allows you to make further changes :)
– jackofallcode
Aug 15 '19 at 9:38
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@selector() in Swift?
...unction has no parameters, the only way to disambiguate it is to use an as cast with the function's type signature (e.g. foo as () -> () vs foo(_:)).
There's a special syntax for property getter/setter pairs in Swift 3.0+. For example, given a var foo: Int, you can use #selector(getter: MyClass.f...
What is the C# equivalent to Java's isInstance()?
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Depends, use is if you don't want to use the result of the cast and use as if you do. You hardly ever want to write:
if(foo is Bar) {
return (Bar)foo;
}
Instead of:
var bar = foo as Bar;
if(bar != null) {
return bar;
}
...
How do I load an org.w3c.dom.Document from XML in a string?
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shouldn't there be casting return (Document) builder.parse(new ByteArrayInputStream(xml.getBytes()));??
– InfantPro'Aravind'
Jan 16 '13 at 14:10
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