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# Yuecai Zhu's Blog (5)

### comparative study note of Python and Java 4 --Function and Polymorphism

Function and Polymorphism

# The Hovering Question

When I started learning these two languages, as mentioned before, I always keep in mind that the difference between dynamic data type and static data type. Then the question came out: why they need to be like that? What is the advantage of being dynamic data type or being static data type? To make the question more concrete, let’s see how to define a function in both languages.

In Java, everything is very…

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Added by Yuecai Zhu on December 16, 2013 at 1:30pm — No Comments

### A summary on Maximum likelihood Estimator

A summary on Maximum likelihood Estimator

# Why to learn MLE?

The drawback of least square estimator

A general method of building a predictive model requires least square estimation at first. Then we need work on the residuals, find the confidence interval of parameters and test how well the model fits the data which are based on the normally distributed assumption of the residuals (or noises). But unfortunately the assumption is not guaranteed. Most…

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Added by Yuecai Zhu on November 28, 2013 at 8:00am — No Comments

### comparative study note of Python and Java 3 - Sequence type

3. Sequence Type

This time, we compare the sequence types of the two languages. By the terminology sequence type, we mean the data structure that is kind of a sequence of data.

In Java, we have: String, array, list(arraylist and linkedlist), set;

In Python, we have: Str, tuple, list, set;

Yes, String is one of the sequence type, because it is a sequence  of char, isn’t it? About the Sting type, we only need to…

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Added by Yuecai Zhu on November 10, 2013 at 12:00pm — 2 Comments

# 2.The control flow statements

Now we try to use the two languages to do a practice. The following, one in Java one in Python, are two programs with the same algorithm.

/*

* program author: Yue Cai Zhu.…

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Added by Yuecai Zhu on October 30, 2013 at 5:32pm — No Comments

### Comparative study note of Java and Python (I)

One usually asked question is:  with which programming language to start when someone just begins studying computer science? Then a lot of suggestions will come up.

1      1.       You should start with one static typed language say C/C++, java etc. and then move easily to dynamic typed language like Perl, Python etc. Because it is harder to move from dynamic typed language to static typed language.

But…

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Added by Yuecai Zhu on October 30, 2013 at 5:29pm — No Comments

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