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Can you write virtual functions / methods in Java?
...println("I eat like a generic Animal.");
}
public static void main(String[] args)
{
List<Animal> animals = new LinkedList<Animal>();
animals.add(new Animal());
animals.add(new Fish());
animals.add(new Goldfish());
animals.add(new OtherAnimal());...
Linq: GroupBy, Sum and Count
... ProductName = cl.First().Name,
Quantity = cl.Count().ToString(),
Price = cl.Sum(c => c.Price).ToString(),
}).ToList();
The use of First() here to get the product name assumes that every product with the same product code has the same product name....
Find and replace with sed in directory and sub directories
... he wants to find all files in sub directories contain that string and replace, not only a single file
– phuclv
Jun 9 '17 at 9:58
add a comment
...
NSInvocation for Dummies?
...o the target object) later on.
For example, let's say you want to add a string to an array. You would normally send the addObject: message as follows:
[myArray addObject:myString];
Now, let's say you want to use NSInvocation to send this message at some other point in time:
First, you would...
How can I assign the output of a function to a variable using bash?
...local nl=$'\x0a'; # that's just \n
echo "output${nl}${nl}" # 2 in the string + 1 by echo
}
# append a character to the total output.
# and strip it with %% parameter expansion.
VAR=$(scan2; echo "x"); VAR="${VAR%%x}"
echo "${VAR}---"
prints (3 newlines kept):
output
---
Use an output p...
Rails.env vs RAILS_ENV
...s/lib/initializer.rb, line 55
def env
@_env ||= ActiveSupport::StringInquirer.new(RAILS_ENV)
end
But, look at specifically how it's wrapped, using ActiveSupport::StringInquirer:
Wrapping a string in this class gives
you a prettier way to test for
equality. The value return...
Google Chrome display JSON AJAX response as tree and not as a plain text
... Unfortunately this still doesn't force Chrome to turn the JSON string into tree. Thanks though!
– GRboss
Oct 8 '10 at 8:42
...
Get last element of Stream/List in a one-liner
... Goetz makes a point, further the API documentation states that reduce("", String::concat) is an inefficient but correct solution for string concatenation, which implies maintenance of the encounter order.The intention is well-known,the documentation has to catch up.
– Holger
...
How to tell if rails is in production?
... Everything with a questionmark is available. Rails.env is a String decorated with ActiveSupport::StringInquirer. api.rubyonrails.org/classes/ActiveSupport/StringInquirer.html
– Sebastian vom Meer
Feb 26 '15 at 7:59
...
count members with jsonpath?
...Test
public void givenJson_whenGetLengthWithJsonPath_thenGetLength() {
String jsonString = "{'username':'jhon.user','email':'jhon@company.com','age':'28'}";
int length = JsonPath
.parse(jsonString)
.read("$.length()");
assertThat(length).isEqualTo(3);
}
Or simply pars...