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Bookmark or Share- What exactly are DLL files, and how do they work?According to Microsoft. (DLL) Dynamic link libraries are files that contain data, code, or resources needed for the running of applications. These are files that are created by the windows ecosystem and can be shared between two or more applications. When a program or software runs on Windows, much of how the application works depends on the ...
- How can I check if a string is a valid number? - Stack OverflowTo check the numerical validity of a value (from an external source for example), you can define in ESlint Airbnb style : /**. * Returns true if 'candidate' is a finite number or a string referring (not just 'including') a finite number. * To keep in mind: * Number(true) = 1. * Number('') = 0.
- What characters are allowed in an email address?Watch out! There is a bunch of knowledge rot in this thread (stuff that used to be true and now isn't). To avoid false-positive rejections of actual email addresses in the current and future world, and from anywhere in the world, you need to know at least the high-level concept of RFC 3490, "Internationalizing Domain Names in Applications (IDNA)".
- Command line for looking at specific port - Stack OverflowIs there a way to examine the status of a specific port from the Windows command line? I know I can use netstat to examine all ports but netstat is slow and looking at a specific port probably isn't.
- How do I select rows from a DataFrame based on column values?To select rows whose column value does not equal some_value, use !=: The isin returns a boolean Series, so to select rows whose value is not in some_values, negate the boolean Series using ~: For example, 'B': 'one one two three two two one three'.split(), 'C': np.arange(8), 'D': np.arange(8) * 2}) yields.
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