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how to permit an array with strong parameters
... like the relevant section of the docs:
The permitted scalar types are String, Symbol, NilClass, Numeric, TrueClass, FalseClass, Date, Time, DateTime, StringIO, IO,
ActionDispatch::Http::UploadedFile and Rack::Test::UploadedFile.
To declare that the value in params must be an array of per...
Java Class that implements Map and keeps insertion order?
...you iterate over the keySet(), entrySet() or values() of the map.
Map<String, String> map = new LinkedHashMap<String, String>();
map.put("id", "1");
map.put("name", "rohan");
map.put("age", "26");
for (Map.Entry<String, String> entry : map.entrySet()) {
System.out.println(e...
Find column whose name contains a specific string
...rame with column names, and I want to find the one that contains a certain string, but does not exactly match it. I'm searching for 'spike' in column names like 'spike-2' , 'hey spike' , 'spiked-in' (the 'spike' part is always continuous).
...
Force point (“.”) as decimal separator in java
...
Use the overload of String.format which lets you specify the locale:
return String.format(Locale.ROOT, "%.2f", someDouble);
If you're only formatting a number - as you are here - then using NumberFormat would probably be more appropriate. But...
How to remove all subviews of a view in Swift?
...hese features are fun!
let funTimes = ["Awesome","Crazy","WTF"]
extension String {
func readIt() {
print(self)
}
}
funTimes.forEach({ $0.readIt() })
//// END EDIT
Just do this:
for view in self.view.subviews {
view.removeFromSuperview()
}
Or if you are looking for a spec...
java.util.Date to XMLGregorianCalendar
...45.678Z
It’s the same as the latter of my example XMLGregorianCalendar strings above. As most of you know, it comes from Instant.toString being implicitly called by System.out.println. With java.time, in many cases we don’t need the conversions that in the old days we made between Date, Calend...
How to grab substring before a specified character jQuery or JavaScript
...
This will not work if the string being searched does not contain an instance of the search character. It will return an empty string.
– David G
Aug 20 '15 at 19:48
...
Can I call an overloaded constructor from another constructor of the same class in C#?
...he constructor.
for example
class foo
{
public foo(){}
public foo(string s ) { }
public foo (string s1, string s2) : this(s1) {....}
}
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String comparison in bash. [[: not found
I am trying to compare strings in bash. I already found an answer on how to do it on stackoverflow . In script I am trying, I am using the code submitted by Adam in the mentioned question:
...
When is an interface with a default method initialized?
...{
int k = Test.out("k", 5);
}
class Test {
public static void main(String[] args) {
System.out.println(J.i);
System.out.println(K.j);
}
static int out(String s, int i) {
System.out.println(s + "=" + i);
return i;
}
}
Its expected output is:
1
j=...