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  When will resizing be triggered in Java HashMap?

HashMap is one of the most frequently used collection types in Java, it stores key-value pairs. Ideally it expects to use hash table which expects the data access time complexity to be O(1), however, due to hash conflicts, in reality, it uses linked list or red-black tree to store data which makes the worst case time complexity to be O(logn).  Although collections are using data structures like arrays and linked lists, unlike arrays, they will dynamically resize when there is not enough spa...

   JAVA,RESIZE,HASHMAP,THRESHOLD     2020-05-02 20:41:19

  Method chaining and lazy evaluation in Ruby

Method chaining has been all the rage lately and every database wrapper or aything else that’s uses queries seems to be doing it. But, how does it work? To figure that out, we’ll write a library that can chain method calls to build up a MongoDB query in this article. Let’s get started! Oh, and don’t worry if you haven’t used MongoDB before, I’m just using it as an example to query on. If you’re using this guide to build a querying library...

   Ruby,Method chaining,Lazy evaluation,Implementation     2011-11-29 08:51:17

  Generate signed certificate from CSR in Java

In our previous tutorial, we have explained how to generate CSR which can be sent to CA for generating a signed certificate. In this tutorial, we will explain how to generate the signed certificate from CSR in Java. We will not use an actual CA but a self-signed certificate to act as a CA certificate. Since the CSR contains the subject information where a certificate needs to be generated and signed for. The key here is to extract the subject information from the CSR and then set it as the subje...

   JAVA,CSR,SIGN CERTIFICATE     2020-10-24 07:03:17

  A String is not an Error

I decided to write a little article to discourage an unfortunately common pattern in Node.JS modules (and browser JavaScript, to a lesser extent) that can boil down to these two examples: // A:function myFunction () {  if (somethingWrong) {    throw 'This is my error'  }  return allGood;} and // B: async Node.JS-style callback with signature `fn(err, …)`function myFunction (callback) {  doSomethingAsync(function () {    // …    if (...

   JavaScript,Node.js,String,Error object     2011-12-23 08:00:32

  JavaScript tutorial - Creating time delays

There are two ways of creating time delays with JavaScript. The first is more simple and will simply wait for a specified amount of time before executing a function. The second does the same but will repeatedly execute the function. Note, many browsers have a minimum delay length of between 25 and 75 ms, with some of the fastest browsers having a minimum delay of about 3 ms. If a shorter delay is specified, the actual delay will be the minimum delay length. Even with higher numbers, the delay i...

   JavaScript,Time delay,setTimeout,setInterval     2012-04-13 07:17:46

  Macro vs. Micro Optimisation

So there's recently been a bit of hype about another Colebourne article: http://blog.joda.org/2011/11/real-life-scala-feedback-from-yammer.html I'd like to respond to a few points he makes. First - You should evaluate Scala and pay attention to its benefits and flaws before adopting it.  Yes, there are flaws to Scala.   Working at typesafe makes you more aware of some of them.  We're actively working to reduce/minimize/get rid of these.   In my opinion, the negat...

   Optimization,Performance,Micro,Macro,Software     2011-11-30 12:04:25

  10 Easy Things to Do to Enhance Your Online Security Today

If you think you don’t need to take extra steps to increase your cyber security, you are wrong. Statistics on cybercrime are shocking and clearly prove that you can’t have ‘too much security’ while using the Internet today. For example, did you know that by 2023 cybercriminals will have stolen over 33 billion private records or that 15 million Americans became victims of digital identity theft in 2017 (Norton)? That’s not even mentioning millions of monetary losses ...

   DATA SECURITY,SECUIRITY     2019-01-21 07:01:37

  JavaScript showModalDialog method

In JavaScript, showModalDialog()  method creates a simple modal dialog box which is a simple html page but when a modal dialog opens, user can't switch to another page until it closes the modal dialog box. Syntax:  window.showModalDialog( url, arguments, feature options); Where url is the URL of page which is to be opened in modal window and arguments are those arguments which we are passing to the modal window and feature options are the attributes set for the modal windo...

   JavaScript,JS,showModalDialog,Example     2011-07-27 10:51:47

  Writing unit tests for legacy code – an open letter to developers I work with

This is an email I sent today to developers who work with me, it is exactly as I wrote it except for project and developer names which I’ve redacted. Dear Developers, S asked me a difficult question today, and I think the answer (which took me a few minutes to arrive at) is worth sharing with all developers, mainly because many of you will surely face the exact same problem especially in [maintenance and enhancement] projects. By now I think it is crystal clear that one of our non-ne...

   Unit testing,Open letter     2012-02-09 05:39:56

  10 Reasons Why Visual Basic is Better Than C#

Visual Basic is a better programming language than Visual C#. Who says so? This article! Here are 10 reasons why you should always choose VB over C#. 1 – “Rose is a rose is a rose is a rose” This is a quotation from Gertrude Stein’s 1922 play Geography and Plays. However, the poetry wouldn’t work in C#, because – unforgivably – it’s a cASe-SeNSitIvE language. This is madness! Before I start ranting, let me just acknowledge that case-sens...

   Visual basci,C#,Advantage,Comparison     2012-03-10 04:24:03

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