How do you run multiple spiders in scrapy?

How do you run multiple spiders in scrapy? How to Use and Run Multiple spiders, tiems, pipelines in the Scapy Framework. With scrapy, create only one project, create multiple spiders, each spider specifies items,pipelines. Start a crawl by writing only one startup script, and start all at once. How can I use different pipeline for […]

Can a user be a member of more than one role?

Can a user be a member of more than one role? A group or user can be a member of any number of roles, each role with a different permission. When a user is a member of multiple roles, the permissions defined for each role are cumulative. How are the permissions defined in multiple roles? […]

How to change the boot order in KVM?

How to change the boot order in KVM? The most common option is the BIOS bootloader where it allows you specifying boot order via changing domain XML. try command virsh edit <your-domain-name> then adjust the boot order with this example (copied from libvirt.org): How to start a virtual machine using libvirt? But there are various […]

Can You fade out an image in imageview?

Can You fade out an image in imageview? What Im’trying to do, is to change images from an ImageView using the fade effect, so the currently displayed image will fade out, and another one will fade in. Considering that I have an image already set, I can fadeout this Image without problem, with this: How […]

Why are ” secure iframes ” on HTTP sites are bad for security?

Why are ” secure iframes ” on HTTP sites are bad for security? One of the big problems with security is a lack of awareness about security risks. To counter this, browsers today indicate that login forms, payment forms, etc. on HTTP sites are insecure. If you load your iframe over HTTPS on an HTTP […]

What happens when you highlight a row in CSS?

What happens when you highlight a row in CSS? If a <tr> has its background color specified , that color will be lost after highlighting (for example Row B below). If a style is already specified on a <tr> element, that <tr> will not highlight (for example, Row A below). How to highlight every other […]

How do I know if jQuery Ajax is working?

How do I know if jQuery Ajax is working? Using developer tool you can check for request and response of the ajax. You can also see console. log(response) where success function is written in ajax function. How does Ajax work in jQuery? The XMLHttpRequest object is part of a technology called Ajax (Asynchronous JavaScript and […]

What should I know about Infinispan in Java?

What should I know about Infinispan in Java? In this guide, we’ll learn about Infinispan, an in-memory key/value data store that ships with a more robust set of features than other tools of the same niche. To understand how it works, we’ll build a simple project showcasing the most common features and check how they […]

How to interact with data using jQuery and Ajax?

How to interact with data using jQuery and Ajax? Using jQuery and Ajax allows you to send just data back and forth instead of entire web pages. In this course, Interacting with Data Using jQuery and Ajax, you’ll learn to make Ajax calls using jQuery. First, you’ll explore the history of Ajax with the JavaScript […]

How can make synchronous Ajax call in jQuery?

How can make synchronous Ajax call in jQuery? Synchronous AJAX call is made when async setting of jQuery AJAX function is set to false while Asynchronous AJAX call is made when async setting of jQuery AJAX function is set to true. Default value of the async setting of jQuery AJAX function is true. What is […]