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Understanding recursion [closed]
...when printing out items from nested arrays:
var nestedArray = Array('Im a string',
Array
How to check if an int is a null
...o be able to be null, you need to use Integer instead of int.
Integer id;
String name;
public Integer getId() { return id; }
Besides the statement if(person.equals(null)) can't be true, because if person is null, then a NullPointerException will be thrown. So the correct expression is if (person...
How to keep the spaces at the end and/or at the beginning of a String?
I have to concatenate these two strings from my resource/value files:
16 Answers
16
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How to split a delimited string into an array in awk?
How to split the string when it contains pipe symbols | in it.
I want to split them to be in array.
9 Answers
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How should I copy Strings in Java?
...kup variable still contains the original value "hello" (this is because of String's immutability right?).
5 Answers
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How do I capitalize first letter of first name and last name in C#?
Is there an easy way to capitalize the first letter of a string and lower the rest of it? Is there a built in method or do I need to make my own?
...
Using generic std::function objects with member functions in one class
...tip: member function pointer can be implicitly cast to std::function, with extra this as it's first parameter, like std::function<void(Foo*, int, int)> = &Foo::doSomethingArgs
– landerlyoung
Nov 25 '19 at 6:44
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Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
...plicit val sc = new SparkContext(conf)
val range = ('a' to 'z').map(_.toString)
val rdd = sc.parallelize(range)
println(range.reduce(_ + _))
println(rdd.reduce(_ + _))
println(rdd.fold("")(_ + _))
}
Print out:
abcdefghijklmnopqrstuvwxyz
abcghituvjklmwxyzqrsdefnop
defghinopjklmqrst...
Why does a base64 encoded string have an = sign at the end
...4 encoding in C#, however I have seen several times that when I convert a string into base64, there is an = at the end.
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Throw an error in a MySQL trigger
...st_ins before insert on trigger_test
for each row
begin
declare msg varchar(128);
if new.id < 0 then
set msg = concat('MyTriggerError: Trying to insert a negative value in trigger_test: ', cast(new.id as char));
signal sqlstate '45000' set message_text = msg;
end if;
e...