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psql: FATAL: role “postgres” does not exist

...s new posgres user won't have a password? – olaoluwa_98 Nov 30 '19
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How to calculate a Mod b in Casio fx-991ES calculator

...^5 mod 391 = (200^3 * 200^2) mod 391 = ((200^3 mod 391) * 200^2) mod 391 = 98 share | improve this answer | follow | ...
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How do I calculate percentiles with python/numpy?

...2, 1.26, 1.32, 1.38, 1.44, 1.5, 1.56, 1.62, 1.68, 1.74, 1.8, 1.86, 1.92, 1.98, 2.04, 2.1, 2.16, 2.22, 2.28, 2.34, 2.4, 2.46, 2.52, 2.58, 2.64, 2.7, 2.76, 2.82, 2.88, 2.94, 3.0, 3.06, 3.12, 3.18, 3.24, 3.3, 3.36, 3.42, 3.48, 3.54, 3.6, 3.66, 3.72, 3.78, 3.84, 3.9, 3.96, 4.02, 4.08, 4.14, 4.2, 4.26, 4...
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JavaScript DOM remove element

...e's a slightly more succinct way of removing an element from the DOM than calling .removeChild(element) on its parent, which is to just call element.remove(). In due course, this will probably become the standard and idiomatic way of removing an element from the DOM. The .remove() method was added ...
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Is there a constraint that restricts my generic method to numeric types?

...uce Eckel: And it's not clear that the added complexity is worth the small yield that you get. If something you want to do is not directly supported in the constraint system, you can do it with a factory pattern. You could have a Matrix<T>, for example, and in that Matrix you would like to...
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How to run travis-ci locally

... order to run the build. With jenkins you can download jenkins and run locally. Does travis offer something like this? 9 ...
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Provide an image for WhatsApp link sharing

.... But as soon as you use that link once, this "please note" section starts all over again. Step 1: title Maximum of 65 characters <title>your keyword rich title of the website and/or webpage</title> Step 2: description Maximum of 155 characters <meta name="description" content="des...
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Regular expression for floating point numbers

...ssues in some languages (like Java). Thanks to the nameless one for originally recognizing this. One relatively simple pattern for matching a floating point number is [+-]?([0-9]*[.])?[0-9]+ This will match: 123 123.456 .456 See a working example If you also want to match 123. (a period w...
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Visualizing branch topology in Git

...n on my own machine, and I find it difficult to maintain a mental model of all my branches and commits. I know I can do a git log to see the commit history from where I am, but is there a way to see the entire branch topography, something like these ASCII maps that seem to be used everywhere for e...
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Difference between “change” and “input” event for an `input` element

...st browsers when content is changed and the element loses focus. It's basically an aggregate of changes. It will not fire for every single change as in the case input event. The input event fires synchronously on change of the content for the element. As such, the event listener tends to fire more f...