Skip to main content

Books : Every Computer Science Student Should Read Before Leaving College

Awesome books for Computer Science students:

===================================================================
-------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------- 
 ------------------------------------------------------------------------------------------------------------------------

 -------------------------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------
Labels:

Comments

Post a Comment

Popular posts from this blog

com.mongodb.MongoCommandException: Command failed with error 18: 'Authentication failed.' on server

If you are trying to connect Mongo DB Server and it insanely throwing following error. com.mongodb.MongoTimeoutException : Timed out after 1000 ms while waiting for a server that matches ReadPreferenceServerSelector{readPreference=primary}. Client view of cluster state is {type=UNKNOWN, servers=[{address=192.168.1.10:27010, type=UNKNOWN, state=CONNECTING, exception={ com.mongodb.MongoSecurityException: Exception authenticating MongoCredential {mechanism=null, userName='user123', source='admin', password=<hidden>, mechanismProperties={}}}, caused by {com.mongodb.MongoCommandException: Command failed with error 18 : 'Authentication failed.' on server 192.168.1.10:27010 . The full response is { "ok" : 0.0, "code" : 18, "errmsg" : "Authentication failed." }}}] If you start looking the error content First you encounter with Timeout Exception which may mislead you. It is basically an authentication error. I...
5 comments
Read more

Easiest Method to Read and Write into Files Streams in Competitive Programming

                      T his article is about easiest way to perform read and write operation from file. File handling is one of the most important aspect of programming and it becomes more important when we do competitive programming. Here are some context when you need to deal with files in comptetive programming. 1) Some specific programming contests like Google Code Jam and Facebook Hacker Cup they provide a file for input. You have to read input from that file and write answers into a file and upload on server within limited time. 2) If you are trying to code for a problem. Suppose the problem was that a square matrix is given and you have to rotate the matrix by 90 degree clock-wise. First line of input indicate the total no. of test cases and first line before matrix represents size of matrix. Then input would be like this. 3 5 10 23 43 34 21 11 13 43 30 71 10 23 43 ...
4 comments
Read more

java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager

If you are trying to get started with Janus Graph with Apache Cassandra. You may get the following error. Caused by: org.janusgraph.diskstorage.TemporaryBackendException: Temporary failure in storage backend at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.getCassandraPartitioner(CassandraThriftStoreManager.java:219) ~[janusgraph-cassandra-0.2.0.jar:na] at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.<init>(CassandraThriftStoreManager.java:198) ~[janusgraph-cassandra-0.2.0.jar:na] ... 48 common frames omitted Caused by: org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused (Connection refused) at org.apache.thrift.transport.TSocket.open(TSocket.java:187) ~[libthrift-0.9.2.jar:0.9.2] at org.apache.thrift.transport.TFramedTransport.open(TFramedTransport.java:81) ~[libthrift-0.9.2.jar:0.9.2] at org.janusgraph.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeR...
2 comments
Read more