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  The concept of Iterative Model in a Software Development Life Cycle (SDLC)

The iterative model implemented in any Software Development Life Cycle is all about an initial, simplified implementation which may or may not gain more complexity in future. Furthermore, it is can even be called as a broader feature set until and unless the final system is accomplished. Now while discussing the model, chances are there that he concept of incremental development will also often be used liberally and interchangeably. This means incremental alterations made during the design and i...

   SOFTWARE DEVELOPMENT,SDLC,ITERATIVE MODEL,SOFTWARE DEVELOPMENT LIFE CYCLE     2017-09-11 06:02:39

  The hidden risk of passing slice as function parameter

In Go's source code or other open source libraries, there are lots of cases where a slice pointer is passed to function instead of slice itself. This brings up a doubt why not passing slice directly as its internal is backed by an array pointer to point to underlying data? For example, in log package, the formatHeader function takes a parameter buf as type *[]byte instead of []byte. func (l *Logger) formatHeader(buf *[]byte, t time.Time, file string, line int) {} Let's understand the r...

   GOLANG,SLICE,SLICE POINTER     2020-12-13 06:11:14

  Fix External Monitor Flickering on MacBook M4 Pro

Recently got a new MacBook M4 Pro and everything works fine until one day suddenly noticing the screen started to be flickering and never stops, realizing it might be some problem happening, so started to try to see whether it's just a glitch or persisting issue. Tried to do following: Turn off the external monitor off and then on Plug out the HDMI cable of the external monitor and plug in back Restart the MacBook M4 Pro These all failed to work, the issue still happens. So was following diffe...

   MACBOOK M4,MONITOR FLICKERING     2024-11-19 21:31:16

  Format JSON data on Ubuntu

JSON now becomes a very popular data format because of its simplicity and light-weight. Nowadays many RESTful APIs will offer a choice of exchanging JSON data between the server and client. Sometimes the data may not be formatted and it cannot be easily read by human beings. It's frequently desired that the unformatted JSON data should be formatted before read. Today we will show a few ways to format JSON data on Ubuntu. Assume we have a json file test.json with below content. { "title": "Test"...

   RUBY,PYTHON,NODEJS,JSON,JQ,PERL,LINUX,UBUNTU,YAJL     2016-08-17 11:05:09

  iPhone App Development: What’s New For Developers In iOS 11

A curiosity ends with the introduction of iOS 11 on 5th of June 2017. It is the next-generation version of iOS. This update takes the best and most advanced operating system and turns it up to 11. But with iOS 11 was released to the public on 19 September 2017 and since then, there have been two distinct updates to iOS 11.02 which fixed the earpiece noise during phone calls; and the major iOS 11.1. iOS 10 was an operating system update that largely ignored the iPad, but Apple made up for it in ...

   APPLE,IOS11     2017-11-02 11:15:22

  Build a Kubectl Plugin from Scratch

by author The command-line tool kubectl is indispensable when using Kubernetes. You need it to query related Pod and Service information both in developing or performing some maintenance operations, such as events, scale, rolling update, etc. However, when using kubectl, there are many inconveniences. Though Kubernetes is officially maintaining kubectl¹, and you can submit the problems, improvement, and even PR in its Github Issues, you still have to wait long before its release. The m...

   KUBENETES,KUBECTL,PLUGIN,GOLANG     2020-12-02 03:43:16

  What is cache penetration, cache breakdown and cache avalanche?

When designing and developing highly available system, cache is an very important consideration. It is useful to cache some frequently accessed data so that they can be accessed quickly and also cache can protect the downstream system like DB from being hit too often.  To provide better cache design in large systems, some problems may need to be considered first. In this post, we will talk about some frequently discussed cache problems and mitigation plans. Cache penetration Cache penetrati...

   SYSTEM DESIGN,CACHE PENETRATION,CACHE BREAKDOWN,CACHE AVALANCHE     2020-04-10 08:43:00

  JSON in JavaScript

When sending an AJAX request to the server, the response can have two formats : XMLHttpRequest.responseXML to access data with XML format and XMLHttpRequest.responseText to access data with string format. XML is the standard data transfer format, but one weakness is it's troublesome to parse and retrieve the data. JSON(JavaScript Object Notation) is a light weight data interchange format, we call it the JavaScript object representation. The advantage of using JSON as the data format is itself is...

   JSON,JavaScript     2013-05-04 23:25:57

  Path gets another $40miliion investment

Social network website Path may officially announce today that it has completed its funding round B. According to sources, Red Point led this round of  funding of $ 40 million. In addition,  Path's market value is estimated about $ 250 million.Path was established in November 2010, there are currently over 2 million registered users. The company's slogan "Path to help you easily share with friends Life". Path call themselves "private social network" because Path is based on e-mail addr...

   Path,Social network,Funding round     2012-04-17 06:50:10

  How does JGSS read Windows native TGT credential?

MS LSA is a protected subsystem that authenticates and logs users onto the local system. The user credential is stored at the native credential cache of LSA on Windows. This kind of credential is often used to authenticate the user to the server, one of the authentication methods is Kerberos. JGSS has provided a native interface which can read the native TGT credential and use it to get the TGS of a service. But how does JGSS read the native TGT credential? Here is a sample code for reading nati...

   KERBEROS,JGSS,MS LSA,NATIVE CREDENTIAL,TGT,SESSION KEY TYPE     2015-03-25 03:42:32

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