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How to avoid null checking in Java?
...en just disable them. No one implied that the behaviour is not documented. MySQL is written in C where dereferencing null pointers is undefined behaviour, nothing like throwing an exception.
– fgb
Apr 8 '13 at 0:39
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source of historical stock data [closed]
...nd it will be able to store the data in a database of your choice: MS SQL, MySQL, SQLite, etc. It's open source, but I'll post more information on my blog when I get closer to releasing it (within a couple of days).
Another option is eclipse trader... it allows you to record the historical data wit...
How to design a database for User Defined Fields?
...out this solution here: http://backchannel.org/blog/friendfeed-schemaless-mysql
Or you can use a document-oriented database, where it's expected that you have custom fields per document. I'd choose Solr.
share
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How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throw
...nstead. See also How to insert uploaded image from p:fileUpload as BLOB in MySQL?
Another potential problem with native API will manifest is when the upload component is present in a form on which a different "regular" ajax request is fired which does not process the upload component. See also File...
How to use Elasticsearch with MongoDB?
...data from everything what is supporting streams (i.e. MongoDB, PostgreSQL, MySQL, JSON files, etc)
Example for MongoDB to Elasticsearch:
Install packages:
npm install elasticbulk
npm install mongoose
npm install bluebird
Create script i.e. script.js:
const elasticbulk = require('elasticbulk')...
Non-Relational Database Design [closed]
...s, far faster than the same operations could be done in application code. (MySQL is an exception to this, from what I understand). In my experience, premature denormalization is, like other premature optimization, often a sign of poor developers.
– Ian Varley
A...
Differences between socket.io and websockets
...
what do you suggest we use to interact with mysql -> express.js / fastify.js or node.js directly... to build android and ios chat apps
– DragonFire
May 6 at 1:05
...
What is the difference between YAML and JSON?
...anchors." Thus it can handle relational information as one might find in a MySQL database.
YAML is more robust about embedding other serialization formats such as JSON or XML within a YAML file.
In practice neither of these last two points will likely matter for things that you or I do, but in t...
What is the difference between JSON and Object Literal Notation?
...lf. It is derived from a single language.
SQL Language - Hibernate MySQL Dialect, Oracle Dialect,.. which have some changes or added functionality.
Information about the browser and computer of your users.
navigator.appName // "Netscape"
ECMAScript is the scripting language that form...
How does database indexing work? [closed]
... 50 bytes
(record pointer) Special 4 bytes
Note: Pointers in MySQL are 2, 3, 4 or 5 bytes in length depending on the size of the table.
Example 2 - indexing
Given our sample database of r = 5,000,000 records with an index record length of R = 54 bytes and using the default block siz...