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摘要： Snorkel使用SQLAlchemy作为数据管理工具，在本地会生成一个.db文件，现有操作与.db文件中已有的记录重复，违反了数据库主键不能重复的性质 解决方式： You can load a labeled dev set json file by replacing the following 阅读全文

摘要： npm start 遇到问题 Attempting to bind to HOST environment variable: x86_64-apple-darwin13.4.0 If this was unintentional, check that you haven't mistakenly 阅读全文

摘要： Check if a given binary tree is completed. A complete binary tree is one in which every level of the binary tree is completely filled except possibly 阅读全文

摘要： Given a matrix of size N x M. For each row the elements are sorted in ascending order, and for each column the elements are also sorted in ascending o 阅读全文

摘要： Get the list of list of keys in a given binary tree layer by layer. Each layer is represented by a list of keys and the keys are traversed from left t 阅读全文

摘要： Find the K smallest numbers in an unsorted integer array A. The returned numbers should be in ascending order. Assumptions A is not null K is >= 0 and 阅读全文

摘要： class Solution { public int lengthLongestPath(String input) { String [] arr=input.split("\n"); int [] lens= new int[arr.length]; int max=0; for(String 阅读全文

摘要： searching in rotated sorted array, is kinda the same as searching in a common array, the only difference is that, you need to concern which part is yo 阅读全文

摘要： need to use scratch to find the pattern class Solution { public void rotate(int[][] matrix) { int n=matrix.length; for (int i=0; i<n/2; i++) for (int 阅读全文

摘要： A classic BFS problem, that is, we use a Queue to store temporary solution and record the size of the current Queue. For each node in this BFS tree, w 阅读全文