Actively updating… This post assume the reader to be familiar with at least one of other popular used programming language, preferably Java and C++; or know python before and just need refresh. Array Python’s array type is similar to C++’s vector or Java’s ArrayList. And for algorithm practice we usually use list, which will be introduced in next section. Ref: array — Efficient arrays of numeric values # create an array array('u', 'hello \u2641') array('l', [1, 2, 3, 4, 5]) array('d', [1.

When we practice LeetCode questions, we always need to write a helper recursive function outside the main solution function. For example, to find the max value in a binary tree, we can have the following codes: (method-1) class Solution { // pre-order DFS void helper(TreeNode *root, int &ret) { if (!root) return; ret = std::max(ret, root->val); helper(root->left); helper(root->right); } public: int findMax(TreeNode *root) { int maxval = std::numeric_limits<int>::min(); helper(root, maxval); return maxval; } }; Sometimes we don’t want to write the helper outside our working function, i.

Introduction This article is mainly talking about the difference between interface and abstract class, which is a frequently asked questions at interview. I will discuss Java first, and then C++. Personally, I am more familiar with C++, although I can write Java. So at the time one friend asked me about the question, I was shocked. I did not know “interface” at all. But after searching around, I learned that “interface” and “abstract class” are somehow ideas of OOP (especially, Java OOP).

Introduction This article mainly focus on how to run a HTTP server inside a docer container. The key point is port mapping. Basic setup I skipped installation of docker at ubuntu here. Please refer to my last docker note. For server example, I have some in my github. C version Python flask Rust version Here I choose Rust version for example. Run Rust docker # pull rust official image to local docker pull rust # run a container docker run -itd -p 8080:5000 --name httpserver rust Here -itd means ‘interactive’, ‘TTY’ and ‘detached’, which are running options of container.

1. Introduction This is a small project to learn basics of TensorFlow and solving time series problems with RNN. For more details, please refer to the codes at Github: ysmiles. 1.1 Time-series A time series is a series of data points indexed (or listed or graphed) in time order. Most commonly, a time series is a sequence taken at successive equally spaced points in time. Thus it is a sequence of discrete-time data.