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How to create a self-signed certificate with OpenSSL

... You can do that in one command: openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 You can also add -nodes (short for no DES) if you don't want to protect your private key with a passphrase. Otherwise it will prompt you for "...
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Hide text using css

...n issue with this method since only the text before word-wrap is indented, and the W3C spec doesn't specify a situation for negative indent so this could have unpredictable results – Chris Farmiloe Jan 23 '09 at 1:34 ...
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DLL and LIB files - what and why?

I know very little about DLL's and LIB's other than that they contain vital code required for a program to run properly - libraries. But why do compilers generate them at all? Wouldn't it be easier to just include all the code in a single executable? And what's the difference between DLL's and LIB's...
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Find the Smallest Integer Not in a List

... If the datastructure can be mutated in place and supports random access then you can do it in O(N) time and O(1) additional space. Just go through the array sequentially and for every index write the value at the index to the index specified by value, recursively placin...
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Export Data from mysql Workbench 6.0

...own variable 'delayed-insert=FALSE' This error occurs on various systems and can be temporarily fixed by: Going to the appropriate directory depending on the system: a) Windows: C:\Program Files\MySQL\MySQL Workbench 6.3 CE\modules (32-bit installation on x64 systems: C:\Program Files (x86)\MyS...
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Preserve line endings

I run sed to do some substitution on windows and I noticed that it automatically converts line endings to Unix (\n). Is there an option to tell sed to use Windows line endings (\r\n) or even better to preserve the line endings from the file? ...
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Difference between final static and static final

... @Annotation public protected private static final transient volatile And for methods: @Annotation public protected private abstract static final synchronized native strictfp share | impro...
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Inspect element that only appear when other element is mouse overed/entered

...g over the button Press F8 to freeze the page Switch to the Elements panel and use the magnifying glass icon in the top left to select the tooltip If the tooltip shows up because of CSS, here's what you can do in that case: Step-by-step: Open the DevTools Select the triggering element in the d...
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Does Python have a string 'contains' substring method?

... Under the hood, Python will use __contains__(self, item), __iter__(self), and __getitem__(self, key) in that order to determine whether an item lies in a given contains. Implement at least one of those methods to make in available to your custom type. – BallpointBen ...
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How To Check If A Key in **kwargs Exists?

... but it seems **kwargs play by different rules... so why doesn't this work and how can I check to see if a key in **kwargs exists? ...