standalone
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月光杯：
问题解决了吗？
Exceptions in HDFS -
iostreamin：
神，好厉害，这是我找到的唯一可以ac的Java代码，厉害。
[leetcode] word ladder II -
standalone：
One answer I agree with:引用Whene ...
How many string objects are created? -
DiaoCow：
不错！，一开始对这些确实容易犯迷糊
erlang中的冒号 分号 和 句号 -
standalone：
Exception in thread "main& ...
one java interview question
文章列表
As someone has said here
引用You need to look more at the types of queries that you will be needing to access your data rather that just nomarlise every thing to 3rd normal form as in traditional relational databases.
I collected several useful documents on how to design hbase schema.
See the attach ...
Today I used rsync to copy some files but I found for symbolic links it will ignore them if you just use simple command line:
rsync SRC DEST
With google, I finally figure out I need to add the "--links" option.
引用 --copy-links
Turn all symlinks into normal files (leav ...
I'm reading source code of hbase. When come to class org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher I find this class has private member *unassignedNodes* but I cannot find where nodes are added into the set.
To be figured out.
71 // set of unassigned nodes watched
72 private Set<Strin ...
As I have said in my last post, I was developing a hbase based mapreduce application. But one damn thing is the hadoop cluster managed by our system admin has no hbase jars in its classpath...
So I have to figure out how to provide jars needed by hbase to hadoop. I know "hadoop jar" comman ...
Currrently I'm working on sth like calculating how many hits on a page. The problem is the raw data can be huge, so it may not scale if you use RDBMS.
The raw input is as follows.
Date Page User
-----------
date1 page1 user1
date1 page1 user2
date1 page2 user1
date1 page2 user3
... ...
So I ne ...
If you meet this exception, make sure you include the guava-r09-jarjar.jar JAR in your build path. This is usually located in /usr/lib/hadoop-0.20/lib.
http://leetcode.com/onlinejudge#question_91
Decode WaysJun 25 '121292 / 5011
A message containing letters from A-Z is being encoded to numbers using the following mapping:
'A' -> 1
'B' -> 2
...
'Z' -> 26
Given an encoded message containing digits, determine the total number of ways to decod ...
Check if a binary tree is balanced or not. This solution is from the discuss board. Much better than mine.
/**
* Definition for binary tree
* public class TreeNode {
* int val;
* TreeNode left;
* TreeNode right;
* TreeNode(int x) { val = x; }
* }
*/
public class So ...
http://leetcode.com/onlinejudge#question_4
Solution: a little ugly.
public class Solution {
public double findMedianSortedArrays(int A[], int B[]) {
// Start typing your Java solution below
// DO NOT write main() function
int len1 = A.length;
int len2 = ...
Q: Given two words (start and end), and a dictionary, find the length of shortest transformation sequence from start to end, such that:
Only one letter can be changed at a time
Each intermediate word must exist in the dictionary
For example,
Given:
start = "hit"
end = "cog& ...
[leetcode] sqrt(x)
- 博客分类：
- algorithm
I have talked about this question in my previous posts.
http://leetcode.com/onlinejudge#question_69
Q:
Implement int sqrt(int x).
Compute and return the square root of x.
Solution:
public class Solution {
public int sqrt(int x) {
// Start typing your Java solution below
/ ...
http://leetcode.com/onlinejudge#question_126
Q:
Given two words (start and end), and a dictionary, find all shortest transformation sequence(s) from start to end, such that:
Only one letter can be changed at a time
Each intermediate word must exist in the dictionary
For example,
Given:
...
http://leetcode.com/onlinejudge#question_38
Question:
The count-and-say sequence is the sequence of integers beginning as follows:
1, 11, 21, 1211, 111221, ...
1 is read off as "one 1" or 11.
11 is read off as "two 1s" or 21.
21 is read off as "one 2, then one 1" or 1 ...
几种我所用到的用来处理日期，时间的函数总结。
Perl
1. localtime
# 0 1 2 3 4 5 6 7 8
($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
localtime(time);
If parameter is not provides, it will use current time. Note the $year returned contains the number of years since 1900, to get a 4-digit year y ...
http://leetcode.com/onlinejudge#question_131
Question:
Given a string s, partition s such that every substring of the partition is a palindrome.
Return all possible palindrome partitioning of s.
For example, given s = "aab",
Return
[
["aa","b"],
["a&q ...