You can simply check whether the multisets with the elements of x and y are equal: This requires the elements to be hashable; runtime will be in O(n), where n is the size of the lists. If the elements are also unique, you can also convert to sets (same asymptotic runtime, may be a little … Read more
Javascript is very flexible with regards to checking for “null” values. I’m guessing you’re actually looking for empty strings, in which case this simpler code will work: Which will check for empty strings (“”), null, undefined, false and the numbers 0 and NaN Please note that if you are specifically checking for numbers it is a common mistake to miss 0 with this method, … Read more
As you can see here, the First method throws an InvalidOperationException when the sequence on which it is called is empty. Since no element of the result of the split equals Hello5, the result is an empty list. Using First on that list will throw the exception. Consider using FirstOrDefault, instead (documented here), which, instead of throwing an exception when the sequence is empty, returns … Read more
In general, the answer to your question is “yes”, but… .equals(…) will only compare what it is written to compare, no more, no less. If a class does not override the equals method, then it defaults to the equals(Object o) method of the closest parent class that has overridden this method. If no parent classes have provided an … Read more
== tests for reference equality (whether they are the same object). .equals() tests for value equality (whether they are logically “equal”). Objects.equals() checks for null before calling .equals() so you don’t have to (available as of JDK7, also available in Guava). Consequently, if you want to test whether two strings have the same value you … Read more
The strict equality operator (===) behaves identically to the abstract equality operator (==) except no type conversion is done, and the types must be the same to be considered equal. Reference: Javascript Tutorial: Comparison Operators The == operator will compare for equality after doing any necessary type conversions. The === operator will not do the conversion, so if two values are not the … Read more