When you're done with configurations, it can stay hidden in the system tray and constantly be on the lookout for changes or errors. Taking everything into consideration, we can say that FMiner Professional is a practical scraping tool which does not really require a lot of effort on your behalf. This tutorial will show how to use FMiner record human actions and scrape multiple. However, progress is saved when the check is complete, and you can also do this manually to save data either to XLS or CSV formats. This tutorial will show how to use FMiner record human actions and scrape multiple sets of data from a page. Schedule custom scraping eventsįurthermore, an implemented scheduler gives you the possibility to save and store data at given intervals of time, but sadly, with no option to receive notifications when changes or errors occur. All actions are monitored and displayed in a real-time updating log, with highlighted text to indicate either errors or successful attempts. When recording is done, you are free to arrange the way elements are triggered in the macro process, and even have them put to a test. They are simply triggered by hitting the “record” button which makes the application track your every interaction with the opened page. You mostly get to work with a set of macro commands that are available in a side panel. Up to five tabs can be accessed and filled with pages of interest. ![]() An integrated web browser is put at your disposal so that all work is concentrated in one place. With a well-organized interface composed of several data analysis sections that can be re-arranged, you come across no accommodation problems. Compare price, features, and reviews of the software side-by-side to make the best choice for your business. With this in mind, the application is designed to make it all look easy. Cones with an integrated browserĪlthough contested by some websites as violating legal terms of privacy, the method is commonly used to gather data and stay up to date with changes, remaining perfectly legal. However, website verification and automatic data collectors have been here for a while, with FMiner Professional being a suitable example of these so-called web scraping applications. However, it's worth being aware of.Since the Internet holds most of today's information and makes it available to anyone with an active connection, being up to date is slightly difficult. I haven't added locking or anything similar as it would distract from the main issue that the question is interested, namely variable capture. Multiple threads could execute it at the same time, potentially stamping on each other's results. ![]() Note about this line: task.ContinueWith(t => result &= t.Result) Īs pointed out in comments, this isn't thread-safe. That variable changes value each time you go through the loop - so it can easily change by the time your delegate is called.īy taking a copy of the variable, you're introducing a new variable each time you go through the loop - when you capture that variable, it won't be changed in the next iteration of the loop.Įric Lippert has a pair of blog posts which go into this in a lot more detail: part 1 part 2.ĭon't feel bad - this catches almost everyone out :( Your current code is capturing path - not the value of it when you create the task, but the variable itself. Task.ContinueWith(t => result &= t.Result) ![]() Take a copy instead: foreach (string path in paths)īoolean taskResult = ProcessPicture(pathCopy)
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