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SEARCH KEYWORD -- Code design

  What will the value of Integer.valueOf(127) == Integer.valueOf(127) be in Java?

Do you really understand how Java does the integer comparison? OK, ignore the statements in the post title. What we are interested in is another set of comparison statements. Let's first see below code snippet. public class IntegerComparison { public static void main(String[] args) { Integer a = 127, b = 127; Integer c = 128, d = 128; System.out.println(a == b); System.out.println(c == d); } } What do you think the output will be? Are they both displaying true? You will find out t...

   JAVA,==,EQUALSTO     2018-01-13 22:18:15

  Simple tutorial on git cherry-pick

It is a common operation to move code from one branch to another branch in a multi-branch git repository. Normally there are two scenarios: Want to move all changes in one branch to another branch, now it's called git merge  Want to move only some change/changes from one branch to another branch, now it's called git cherry-pick Usage The purpose of git cherry-pick is to apply some change from one branch to another branch.  git cherry-pick [commitHash] The above command is to app...

   GIT,GIT CHERRY-PICK,TUTORIAL     2020-05-02 00:02:58

  Let your page be alive

With development of Internet, Web pages lie everywhere. How to design a visually attractive web product is becoming a major concern of designers, A complete webpage consists of the combination of points, lines and layers. If you want to let your page design be alive, you should put your efforts on below 4 aspects. 1. Flexible font use In a webpage, texts are the major information carrier and are what users care mostly about. It's the main element to convey messages to readers. The font size, col...

   UI design,White space,Geometric graph     2013-07-23 03:09:51

  How Integers Should Work (In Systems Programming Languages)

My last post outlined some of the possibilities for integer semantics in programming languages, and asked which option was correct. This post contains my answers. Just to be clear: I want practical solutions, but I’m not very interested by historical issues or backwards compatibility with any existing language, and particularly not with C and C++. We’ll start with: Premise 1: Operations on default integer types return the mathematically correct result or else trap. This is th...

   Number,Algorithm,System,Embedded system     2011-12-05 12:48:41

  CSS Box Shadow Illustration

Used in casting shadows off block-level elements (like divs)..shadow { -moz-box-shadow: 5px 5px 5px #ccc; -webkit-box-shadow: 5px 5px 5px #ccc; box-shadow: 5px 5px 5px #ccc; }The horizontal offset of the shadow, positive means the shadow will be on the right of the box, a negative offset will put the shadow on the left of the box.The vertical offset of the shadow, a negative one means the box-shadow will be above the box, a positive one means the shadow will be below the box.The blur r...

   CSS,Box Shadow,Apple,Chrome,Safari,IE,Il     2011-06-30 04:03:38

  Fix issue docker-credential-desktop not installed or not available in PATH on Mac

Sometimes you may encounter below issue while running docker-compose on MacOS. Traceback (most recent call last): File "docker-compose", line 6, in <module> File "compose/cli/main.py", line 71, in main File "compose/cli/main.py", line 127, in perform_command File "compose/cli/main.py", line 1085, in up File "compose/cli/main.py", line 1081, in up File "compose/project.py", line 527, in up File "compose/service.py", line 354, in ensure_image_exists File "compose/service.py",...

   MACOS,DOCKER,DOCKER-COMPOSE     2020-06-23 03:25:16

  Make a directory using C++ for windows

If you want to create a folder at windows using c++/cpp language, there is an easy way for make a folder. You can do it just including the <windows.h> header file. To make a folder at C:\ drive named "deadman"#include<windows.h>int main(){   CreateDirectory ("C:\\deadman", NULL);   return 0;}If you want to delete a fodler from the C:\ directory.#include<windows.h>int main(){   RemoveDirectory("C:\\deadman");   retur...

   C++,Directory,Windows,CreateDirectory,Example     2012-02-25 04:26:16

  How To Build A Site That Looks Great On Every Screen

The responsive design revolution is upon us. With tablet and smartphone use soaring and changing our media habits, Web publishers no longer have a choice but to build designs that work properly on any device or screen size.The hard-working Silicon Valley design firm ZURB has recently released version 2.0 of its responsive design boilerplate kit called Foundation, which is a fundamental framework for a one-size-fits all Web project.Foundation is a CSS and Javascript framework that comes with...

   Website,Design,Device,Screen,Adaptable,Mobile     2011-10-31 10:46:32

  How to draw pentagram in HTML5 canvas

I wrote simple function to this magical symbol I like so much: 123456789101112131415161718192021222324252627282930<!doctype html><html><body>    <canvas id="c" width="500" height="500"></canvas>    <script> var ctx = (document.getElementById("c")).getContext("2d"); // draws rotated pentagram with or without cirlefunction pentagram( ctx, x, y, radius, rotate, circle ){    ctx.beginPath();&nbs...

   Html 5,Canvas,pentagram     2012-04-23 12:56:06

  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

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