apply

I've got a function wich can accept a varible number of parameter with a rest operator. I want create an object passing the argument collected with the rest operator directly to a constructor without create an object and call an initializing function and without passing the entire array but the parameters ah I do with apply() function. Is it possible ? Using apply doesn't work. public function myFunc(...arg) { // something link "new MyClass.apply(args)" return new MyClass(); } Unfortunately no. There is no way to make apply work for constructor. What is done generally is to prepare a number of

I have a pandas.DataFrame that looks like this. COL1 COL2 COL3 C1 None None C1 C2 None C1 C1 None C1 C2 C3 For each row in this dataframe I would like to count the occurrences of each of C1, C2, C3 and append this information as columns to this dataframe. For instance, the first row has 1 C1, 0 C2 and 0 C3. The final data frame should look like this COL1 COL2 COL3 C1 C2 C3 C1 None None 1 0 0 C1 C2 None 1 1 0 C1 C1 None 2 0 0 C1 C2 C3 1 1 1 So, I have created a Series with C1, C2 and C3 as the values - one way top count this is to loop over the rows and columns of the DataFrame and then over

I wish to obtain weighted means by group for each of several (actually about 60) columns. This question is very similar to: repeatedly applying ave for computing group means in a data frame just asked. I have come up with two ways to obtain the weighted means so far: use a separate sapply statement for each column place an sapply statement inside a for-loop However, I feel there must be a way to insert an apply statement inside the sapply statement or vice versa, thereby eliminating the for-loop . I have tried numerous permutations without success. I also looked at the sweep function. Here is

I see that in different plugins and codes, but I don't understand what does that function... In the jQuery api isn't referenced! Amber apply calls a function with a set of arguments. It's not part of jQuery, it's part of core Javascript. However, there is mention of it in the jQuery docs: http://docs.jquery.com/Types#Context.2C_Call_and_Apply Syntax: somefunction.apply(thisObj, [argsArray]) The above calls the function somefunction , setting this to thisObj within the function's scope, and passing in the arguments from argsArray as the arguments to the function. Essentially, apply will call a