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NoSql vs Relational database
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Documents can be stored in non-relational databases, like CouchDB.
Maybe reading this will help.
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What is InnoDB and MyISAM in MySQL?
...ation to coarser granularity locks) and Oracle-style consistent nonlocking reads increase multi-user concurrency and performance. InnoDB stores user data in clustered indexes to reduce I/O for common queries based on primary keys. To maintain data integrity, InnoDB also supports FOREIGN KEY referent...
How to fetch all Git branches
... oneliner BEFORE git pull --all:
git branch -r | grep -v '\->' | while read remote; do git branch --track "${remote#origin/}" "$remote"; done
TL;DR version
git branch -r | grep -v '\->' | while read remote; do git branch --track "${remote#origin/}" "$remote"; done
git fetch --all
git pull ...
Setting up FTP on Amazon Cloud Server [closed]
... myself and wanted to expand on Jaminto's answer.
I'm assuming that you already have an EC2 instance created and have associated an Elastic IP Address to it.
Step #1: Install vsftpd
SSH to your EC2 server. Type:
> sudo yum install vsftpd
This should install vsftpd.
Step #2: Open up the ...
html onchange event not working
...t doesn't work. I still need to press the submit button to make it work. I read about AJAX and I am thinking to learn about this. Do I still need AJAX to make it work or is simple JavaScript enough? Please help.
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How to split csv whose columns may contain ,
...leIO.TextFieldParser class. This will handle parsing a delimited file, TextReader or Stream where some fields are enclosed in quotes and some are not.
For example:
using Microsoft.VisualBasic.FileIO;
string csv = "2,1016,7/31/2008 14:22,Geoff Dalgas,6/5/2011 22:21,http://stackoverflow.com,\"Corv...
What is the correct way of using C++11's range-based for?
... copy ctor.
3 X copy ctor.
5 X copy ctor.
7 X copy ctor.
9
As it can be read from the output, copy constructor calls are made during range-based for loop iterations.
This is because we are capturing the elements from the container by value
(the auto x part in for (auto x : v)).
This is ineffici...
Get top 1 row of each group
... (where each could have several numbers). This is where Apply excels. Less reads = less disk access = better performance. Given my experience is with poorly designed non-normalized databases.
– TamusJRoyce
Jun 5 '16 at 17:36
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How to change the session timeout in PHP?
...d for EXACTLY 1 hour
session_set_cookie_params(3600);
session_start(); // ready to go!
This works by configuring the server to keep session data around for at least one hour of inactivity and instructing your clients that they should "forget" their session id after the same time span. Both of thes...
What is difference between CrudRepository and JpaRepository interfaces in Spring Data JPA?
...o gain more fine-grained control over the methods expose, e.g. to create a ReadOnlyRepository that doesn't include the save(…) and delete(…) methods of CrudRepository.
The solution to both of these downsides is to craft your own base repository interface or even a set of them. In a lot of appl...