Recent Articles Changed

CSS - Selector

Modified Feb 02 - 15:54

CSS in the CSS context. When a user agent can't parse the selector (i.e., it is not valid CSS), it ignores the declaration block. The whole statement is ignored if there is an error anywhere in the selector. It's an important element of the CSS addr "...

Optical character recognition (OCR)

Modified Jan 27 - 10:14

Optical character recognition, usually abbreviated to OCR, is the translation of: raster images into text. Software Tesseract All the open source software are based on the tesseract OCR engine. Command line VietOC "...

Process - Flow Chart

Modified Jan 27 - 10:09

A Flow chart is a diagram that represents a flow with directed graph generally composed of: (vertice (node)) connected by directed lines (edge) The flow passes a material or logical thing from one step to the other such as: work data order Type "...

Text - Character

Modified Jan 27 - 10:05

A character is: an atomic unit of text (10646ISO/IEC 10646:2000 Character specification] is categorized as a primitive data type A character is the smallest component of written language that has semantic value; refers to the abstract meaning and/ "...

Exclamation Mark

Modified Jan 27 - 09:58

is a punctuation mark History It possibly comes from the Latin phrase io, which was an expression of joy. 14th-century Medieval writers placed this at the end of sentences for emphasis. Eventually, the I was placed above the O!

Browser - Drag and drop

Modified Jan 27 - 09:42

drag and drop where a user may select draggable elements with a mouse, drag those elements to a droppable element, and drop them by releasing the mouse button Library

Software - Bug / Issue

Modified Jan 26 - 08:07

A bug is an unwanted behavior of a program. debugging duplicate of They’re called bugs because computers were the size of rooms and bugs would crawl between high voltage contacts of vacuum tubes and fry. “Debugging” was the act of cleaning o "...

Ansible - Shell

Modified Jan 25 - 10:51

This article shows how to execute a command via a shell with ansible and the ansible shell module Example

Recent Articles Created

Vertx - Future Example

Created Jan 27 - 16:15

CompletableFuture CompletableFuture to wait that an execution finish.

Question Mark

Created Jan 27 - 10:02

: indicate a question is one of the oldest punctuation marks. Some theorize that it's actually an abbreviation for the Latin word “quaestio”, but there is no evidence for this. It has had many different forms over the centuries.

Punctuation Mark

Created Jan 27 - 09:59

are character used to add metadata (extra meaning) to a text. List More ... see this thread

Exclamation Mark

Created Jan 27 - 09:58

is a punctuation mark History It possibly comes from the Latin phrase io, which was an expression of joy. 14th-century Medieval writers placed this at the end of sentences for emphasis. Eventually, the I was placed above the O!

How to get the schema of the function actually executing ?

Created Jan 23 - 12:15

With postgres, it's possible to get execution information by obtaining the execution stack . Example Create a function that returns its own schema In the below function, we: retrieve the stack as a strinregular expression

URI - Host

Created Dec 09 - 16:27

URI In a uri, a host is a subcomponent of authority It's identified by: an IP literal encapsulated within square brackets, an IPv4 address in dotted-decimal form, or a registered name.

Email - Content-transfer-encoding header

Created Dec 08 - 12:20

The Content-Transfer-Encoding is a header value of an email part that defines the encoding. The mechanism value may be: 7bit 8bit binary quoted printable base64 ietf-token / x-token

Email - Quoted Printable Encoding (3D, ..)

Created Dec 08 - 12:04

The quoted printable encoding is: an encoding scheme that is applied to the body of an email part and is given by the Content-Transfer-Encoding header. Example Example Text Raw form: In the Quoted-Printable encoding: Html Encoded:

Data all the way

Always keep one hand firmly on data, Amos liked to say.

Data is what set psychology apart from philosophy, and physics from metaphysics.

Amos Tversky (The undoing project)

Data Warehouse Subsystems

Developing a data warehouse means assembling a lot of subsystems in order to create a whole and coherent data application.

Discovers the 34 Kimball Subsystems and drill down to discover them

Data Warehouse Subsystems

Data Processing

Data processing has changed a lot since 1940 :) and luckily, we are not using punch card anymore.

Stream processing is becoming the norm in data integration task while batch processing stays the king in data analysis.

Data Processing

ENIAC, 1946

The first fully electronic digital computer

Data Modeling

Data Modeling is the translation of process into the world of data. The process is tricky but not insurmountable.

Data Modeling

Dimensional Data Modeling

Dimensional Data Modeling permits you to model a (hyper)cube and analyse a process through different perspective. You define dimensions, measures and metrics.

Dimensional Data Modeling

Most programs process some input to produce some output; that’s pretty much the definition of computing.


A Function is the basic block of all reusable code component. It is also becoming the central component of any serverless architecture.


Knowledge isn't free. You have to pay attention.

Computing Division at the Department of the Treasury, mid 1920s

Table / Relation

The table format (known also as a relation) is the most important data structure used in data analysis. Did you know that its name originate from the medieval counting table ?


Education isn't something you can finish.

Powered by ComboStrap