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What can select do in GoLang
In Go language, select is a keyword used to listen to and perform IO operations related to channels. With the select statement, we can simultaneously listen to multiple channels and perform corresponding operations when any of the channels are ready. This article will summarize the common uses of the select statement and provide some considerations when using it. Basic syntax The basic syntax of the select statement is as follows: select { case <-channel1: // when channel1 has data to ...
A JS1K competition demo for 2012
JS1K is a website which hosts some competitions to attract geeks from the world to create JS apps which are less than 1K (1024 bytes). The object of this competition is to create a cool JavaScript "application" no larger than 1k. Starting out as a joke, the first version ended with a serious amount of submissions, prizes and quality.Recently, I revised a previous project of mine and compressed it to 1018 bytes and submitted it. It is an analog clock. The code is shown below:w=c.width;h=c...
JS1K,HTML5,Competition,Analog clock,Love 2012-03-13 12:17:40
Free PHP, HTML, CSS, JavaScript editor - Codelobster IDE
In this article, we suggest you to get acquainted with the free editor of web languages - Codelobster IDE. It is presented on the software market for a long time already, and it wins a lot of fans. Codelobster IDE allows you to edit PHP, HTML, CSS and JavaScript files, it highlights the syntax and gives hints for tags, functions and their parameters. This editor easily deals with those files that contain a mixed content. If you insert PHP code in your HTML template, then the editor correctly hig...
IDE,CODELOBSTER,PHP,HTML 2019-07-27 09:37:14
Run code with multiple files in the same main package in GoLang
To run a GoLang program, there needs to be a main() function defined. In some cases when developing some demo program which has multiple files and just wanna put them in the same main package and this folder is not in GOPATH, how to run the program? Let's say we have following folder structure where the main() function is defined in main.go. If you just run below command, it would fail to start to run the program and gives some error if some struct is defined in other files and being used. PS D...
EXECUTABLE,GOLANG,MAIN PACKAGE,MULTIPLE FILE 2021-05-15 10:20:10
Nokia unveils Lumia 820
Just finishing introducing the latest flagship model Lumia 920 Nokia introduced mid-range Lumia 820 which is equipped with Windows Phone 8The Lumia 820 is equipped with a Qualcomm Snapdragon S4 1.5GHz dual-core CPU, but the screen is 4.3 inch WVGA screen with 800 x 480 pixels, at the same time it is equipped with 8GB memory space and a 8-megapixel rear camera. In addition, users can extend 8 GB more memory space through Windows Phone 8's extension function.Lumia 820's screen adopts Super S...
Nokia,Lumia 820,Window Phone 8 2012-09-05 19:10:14
Why TCP needs 3 handshakes
Prerequisite Knowledge First, let's look at the control bits and state machine of TCP, which form the basis for understanding the three-way handshake of TCP. TCP Packet Control Bits The control bits in the TCP packet header are used to control the status of the TCP connection and can indicate various control information such as connection establishment, termination, reset, etc. There are six common control bits: SYN (Synchronize Sequence Numbers): Requests to establish a connection (part of the...
REASON,NETWORK,TCP,EXPLANATION,HANDSHAKE 2024-09-28 08:57:52
Why Microsoft chooses Alt+F4 to close a window
For a long time, there is a doubt among lots of Windows users especially those English speaking users, that is why Microsoft chooses Alt+F4 to close a window instead of Alt+Q. Alt+Q is more comfortable to press for many keyboards, also Q represents Quit and it is easier for people to understand. Recently Microsoft answered this doubt. Raymond Chen, longtime Microsoft developer and semi-official Windows historian, said the reason is that not everyone speaks English. It d...
Understand more about Go basics with one interview question
First, let's take a look at below Go interview question: package main const s = "Go101.org" // len(s) == 9 // 1 << 9 == 512 // 512 / 128 == 4 var a byte = 1 << len(s) / 128 var b byte = 1 << len(s[:]) / 128 func main() { println(a, b) } What would be the output in your mind? The output would be 4 0. Surprising? Before getting to the output values, some concepts in Go need to be introduced and explained in more detail. len() len() is a built-in function in Go to get t...
GOLANG,CONSTANT,SHIFT OPERATION,LEN() 2020-10-10 02:52:19
Let's talk about JavaScript deep clone
In JavaScript, deep clone means creating a brand new object that includes all nested objects, with all properties being completely independent copies. This is different from shallow copying, which only copies the first-level properties, with nested objects being referenced rather than copied. There are multiple ways to perform deep copying in JavaScript, but the best one to use depends on the specific use case. Can use JSON.parse & JSON.stringify? ❌ JSON.parse(JSON.stringify(obj)) is a dep...
JAVASCRIPT,DEEP CLONE 2023-02-25 08:57:11
SQLite C/C++ function interfaces
Some simple introduction to the SQLite function interfaces. First let's check some error codes defined in SQLite3 (They are in SQLite3.h file in the SQLite installation).#define SQLITE_OK 0 /* Successful result */ /* beginning-of-error-codes */ #define SQLITE_ERROR 1 /* SQL error or missing database */ #define SQLITE_INTERNAL 2&nb...
SQLite,Function interface,C/C++ 2012-07-04 12:23:43
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