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Why Data Structures Matter
Our experience on Day 0 of JPR11 yielded a nice example of the need to choose an appropriate implementation of an abstract concept. As I mentioned in the previous post, we experimented with Michael Barker’s Scala implementation of Guy Steele’s parallelizable word-splitting algorithm (slides 51-67). Here’s the core of the issue. Given a type-compatible associative operator and sequence of values, we can fold the operator over the sequence to obtain a single accumulated v...
Data structure,JPR,Importance 2012-01-08 10:13:56
Use cases of Java enumeration
JDK 1.5 introduces a new type -- enumeration. In Java, it's just a small feature, but it can bring us much convenience.Here we summarize some use cases of Java enumeration. 1. Constant Prior to JDK 1.5, we can define constant as public static final..., now we can use enumeration to group all constants in one enum variable and it also provides some useful functions. public enum Color { RED, GREEN, BLANK, YELLOW } 2.In Swit...
Java, Enum,enumeration 2013-01-05 09:15:30
How to use xargs command in Linux
What is the xargs command? The xargs command constructs and executes commands provided through standard input. It takes input and converts it into command arguments for another command. This functionality is particularly useful in file management and can be combined with commands like rm, cp, mkdir, and others. Using the xargs command When used alone, the xargs command prompts the user to enter a text string and then passes it to the echo command. This example demonstrates the input provided an...
socket_create() from command prompt with WAMP
Problem:I’m working on a wamp system, and have started playing around with sockets. I enabled sockets via the wamp interface:wamp : PHP settings : PHP extensions : php_socketsand could run my php file via my browser.When trying to run the same file via the command prompt (start : run : cmd), I got the following error:Fatal error: Call to undefined function socket_create() in … on line …Solution:The command prompt uses a different php.ini file to the apache server.The Apac...
PHP,WAMP,Windows,Command line,Socket 2011-05-30 10:59:14
REST和gRPC对比全知道
长期以来,REST是构建API的唯一“标准”。它取代了混乱的“太多XML”的SOAP。但是近年来,出现了新的替代品。2015 年,Facebook 向公众发布了GraphQL,而 2016 年,Google 推出了gRPC。本文将重点介绍 gRPC,并与仍广泛使用的 REST 进行比较。 概述 以下表格将为您提供讨论点的概述,并显示 REST 和 gRPC 的优劣之处。 主题 REST gRPC 标准化 没有标准 定义明确 范式 基于资源...
COMPARISON,GRPC,REST 2023-04-29 06:44:09
Why developers need a Mac
I am by no means an Apple fan. For one thing, I find Windows (and Linux) stable and fast, so you are not going to hear me argue that my computing life was transformed once I made that Switch (with a capital letter). Admittedly that is partly because I am familiar with how to fix and tune Windows and remove foistware, but it is not that hard. For another, I am not an admirer of Apple’s secretive approach, or the fact that most requests for comment from journalists are responded to wi...
Apple,Mac,Development,iOS,Windows 2011-12-07 03:12:17
Check mobile device using JavaScript
Sometimes developers want to know whether the user is using a mobile browser or a desktop browser so that they can build corresponding user experience. Although in many cases responsive web design would help solve component alignment issues, there are performance related considerations in some cases where some code should not be ran or some feature should not be available if user is on mobile browser. or vice versa This post will summarize a few ways which are commonly used to check whether a us...
CHECK,MOBILE BROWSER,MOBILE DEVICE,JAVASCRIPT 2021-10-02 01:36:16
My life as a freelancer
In the summer of 2006 a work buddy, George, has told me that I could make some extra money programming on a site named Rent A Coder. I’ve signed up the same day. After losing some time on a project that never started I lost my interest in “coding for moneyâ€. I almost forgot about RAC.Fast-forward two years, I was a PhD student at a small North American University with a student visa and … nothing else in my pockets. For a few months I was able to make a living from ...
Life,Freelancer,C,Rent a Coder,RAC 2011-11-07 02:53:03
Fun With Numbers
Yesterday the NPD Group issued a report on U.S. tablet sales in the U.S., from January through October of 2011. Worth noting up front is that the numbers in this report are about sales — actual tablets sold to actual customers — not “shipments†from the factory to stores and warehouses.Much-reported on is that second-place went to HP, after its fire sale on the discontinued TouchPad. What hasn’t gotten much commentary is the extraordinarily contort...
Tablet,iPad,TouchPad,HP,Market share,2011 2011-11-24 09:12:58
HTML above flash (transparency + z-index)
We have faced this problem many of the times. When we want to display some message on top of all layers on a page or use some feature like jQuery light boxes. Normally the flash file continues to shine through the page. No matter what you do with layering the dom elements using z-index.See the layering flash content problem definition here.Before this, people used to dodge this issue with some fixes like hiding the flash area completely and then showing a static image of...
HTML,Flash,Above,z-index,wmode,transpare 2011-05-01 15:46:34
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