The project is using SonarCloud static code analysis. The latest results are showing that it has found several blocker and critical severity code smells. In this task those are fixed or marked as false positives. To mark false positives, SuppressWarnings annotation should be used in code as explained in the linked documentation.

Links:
[Blocker and critical severity code smells in SonarCloud](

• We have BFS and DFS images in both Breadth First Traversal and Depth First Traversal. We should have illustrations in the respective sections.

英雄招募

成为 Doocs 项目维护者

本项目 advanced-java，包括 Doocs 开源组织下的所有项目，都欢迎各位朋友参与完善。

如果你提交的内容有价值，且具备规范性，将有机会提升为项目的维护者，直接参与项目的 review、merge 等维护工作，提交内容时也可以直接 push 到 doocs/advanced-java 主分支 master 下，无须提交 PR 等待 review。

目前 advanced-java 只有 [yanglbme](http

MutableClassToInstanceMap

I think it permits null values but not keys. Eventually we should have nullness annotations that make the clear, but even then, it's nice to document up front, as we do for most other types.

Perhaps the ClassToInstanceMap interface should also be clearer that null keys are forbidden and null values might or might not be.

Heap dump: https://blogs.oracle.com/sundararajan/entry/programmatically_dumping_heap_from_java

数轴上放置了一些筹码，每个筹码的位置存在数组 chips 当中。

你可以对 任何筹码 执行下面两种操作之一（不限操作次数，0 次也可以）：

将第 i 个筹码向左或者右移动 2 个单位，代价为 0。
将第 i 个筹码向左或者右移动 1 个单位，代价为 1。
最开始的时候，同一位置上也可能放着两个或者更多的筹码。

返回将所有筹码移动到同一位置（任意位置）上所需要的最小代价。

示例 1：

输入：chips = [1,2,3]
输出：1
解释：第二个筹码移动到位置三的代价是 1，第一个筹码移动到位置三的代价是 0，总代价为 1。
示例 2：

输入：chips = [2,2,2,3,3]
输出：2
解释：第四和第五个筹码移动到位置二的代价都是 1，所以最小总代价为 2。
 

提示：

1 <= chips.length <= 1

There should be a README file for each type of design pattern which should include the following points-

• Description of the design pattern
• Common use cases of that design pattern
• Explanation of the code

Many users confuse about no class, no method, expression error.

Arthas should add a verbose/debug option, to print the command arguments and the debug info in command execution.

What's the ETA for updating the massively outdated documentation?

Please update all documents that are related building CNTK from source with latest CUDA dependencies that are indicated in CNTK.Common.props and CNTK.Cpp.props.
I tried to build from source, but it's a futile effort.

This Request For Comments (RFC) describes the new Playlist API, which we are planning to introduce to ExoPlayer. Please find the document on Google Drive and leave your comments.

[REQUIRED] Use case description

Currently the playlist functionality is implemented in ConcatenatingMediaSource. This pr