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  The danger of target=_blank and opener

When want to open a new page in a new tab on clicking a link on a page, the usual way of achieving this is to use target="_blank" property in a tag. However, the use of this leaves space for phishing website. Background parent and opener Before talking about the opener object, let's know a bit about parent object when using iframe. HTML provides a parent object which is used to communicate between the parent page and the embedded iframe element. This parent object can be accessed using...

   HTML,TARGET BLANK,REL NOOPENER,REL NOREFERRER     2018-09-15 04:53:56

  this in JavaScript

this is a keyword in JavaScript. It refers to an internal object created automatically when a function executes, it can only be used in a function. For example:        function test(){ 　　　　this.x = 1; 　　}The this keyword will change when a function is called in different situations. However, the general rule is : this refers to the object which calls the function.Next we discuss the use of this in 4 different situatio...

   this,keyword,use,JavaScript     2012-05-05 12:47:37

  Chrome to provide native image lazyload support

Previously we have introduced how Medium achieved loading images lazily, basically what they did was using lots of HTML tags and CSSs to change the images at different stage. It needs lots of code to do this. With the high demand of this feature for resource consumption and performance consideration, Chrome is now working on a feature to provide native support for loading images/iframes lazily. This feature is named lazyload. lazyload will allow three values: auto: the default behavior of ...

   CHROME,LAZYLOAD,IMAGE,IFRAME     2018-09-22 23:04:35

  People Detection Radar [IoT] : Build a Raspberry PI Xandar Kardian IoT People Count Radar

Program Design Purpose: People detection sensors and radars are utilized in various applications across multiple fields such as security and surveillance, healthcare, building automation, smart cities, transportation and autonomous manufacturing systems. This project aims to develop a prototype IoT device for an indoor people counting using the Xandar Kardian people detection radar and a Raspberry Pi. The device will be network-ready and easily integrated with other systems. The Python-based I...

       2024-07-21 08:19:57

  Fix could not read Username for 'https://xxx.com': terminal prompts disabled

Recently was working on a project which needed to build a docker image, but unfortunately it kept failing as below error was seen. fatal: could not read Username for 'https://xxx.com': terminal prompts disabled Based on the error, it looked like it was trying to pull code from remote Gitlab repository but failed as the terminal prompt is disabled. At first glance, have a doubt why it needs terminal prompt to be enabled? It should just succeed and without prompting for anything. The only reason...

   GIT,TERMINAL PROMPTS DISABLED,DOCKER     2020-12-13 04:43:12

  How Charts Using Logarithmic Scale Provide Insight Into Your Business

In the dynamic realm of business, understanding data is as important as acquiring it. Analytical tools like charts, graphs, and tables aid in data comprehension. Among these tools, the necessary prowess of charts using logarithmic scale often goes unnoticed. Keep reading to know how this instrument can become a game-changer in your business analysis. Understanding Logarithmic Scale Before throwing light on its applications, it's crucial to understand the concept of a logarithmic scale. Unlike l...

   LOGARITHMIC CHARTS,BUSINESS SOLUTION     2023-12-09 02:34:17

  Fix WampServer offline issue

WampServer is a web server on Windows which provides easy to use features for PHP developers. You can easily setup a web server by installing WampSserver without much hard to understand configurations. After installing it and with a simple configuration, you just need to double click it and start all services and your server is gonna up.  If the server starts up normally, you will see a green icon which indicates the working status at the taskbar. But if you don't see the green icon shown u...

   APACHE,PHP,WAMPSERVER     2015-09-13 01:59:38

  Some cases where MySQL cannot be started

After installing MySQL, when we try to start MySQL, sometimes we may not be able to start it. The reasons can be different. We share some general cases where MySQL cannot be started. Case 1: Directory or file permission issue If the permission is set wrongly in MySQL's $datadir and its sub directories or files, MySQL will not be able to read and write files normally. Error message: mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data /usr/local/mysql/bin/mysqld_safe: lin...

   MySQL,Error,Log     2013-08-15 03:32:36

  malloc/free and new/delete in C++

malloc and free are C++/C language standard library functions, while new/delete are operator of C++. They can be used to allocate dynamic memory and free memory in C++ programs malloc/free can not meet the requirements of dynamic objects creation. Object needs to call the constructor to initialize the object when creating, the object needs to call the destructor before it is destroyed  Since malloc() and free() are library functions rather than operators, the compiler has no control permiss...

   C++,memory,malloc,free,new,delete     2012-06-20 06:52:09

  How to check when an API is introduced in GoLang

Normally people would not pay much attention to which GoLang version is being used as lots of functions are backward compatible. However there are cases where GoLang version does matter as some functions may not be supported by old version of GoLang. For example, strings.Builder is introduced in Go 1.10, but below code would fail to be compiled on Go 1.10. package main import ( "fmt" "strings" ) func main() { var b strings.Builder b.WriteString("polarisxu") fmt.Println(b.Cap()) } The ...

   GOLANG,API VERSION,GO TOOL     2021-02-07 00:43:24

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