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How can I check for an empty/undefined/null string in JavaScript?

...cent doing some naïve profiling in Chrome developer tools, testing === '' vs .length didn't show any discernible improvement (and using .length only works if you can assume that you have a string) – bdukes Sep 27 '10 at 13:19 ...
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Python: What OS am I running on?

... I'd have thought it's more likely you upgraded from Windows 8 (vs. it being a clean install) and whatever Python looks up in the registry or whatever was left behind? – OJFord Jan 30 '18 at 20:53 ...
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How to compare two revisions in Bitbucket?

...use git submodules, and in pull requests I can only see the old commit sha vs the new commit sha of each submodule that changed. There is no link to click or anything (that I know of) to jump to this diff view. This url allows me to view what changed in submodules too. Btw, if someone knows of a be...
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Are HTTP headers case-sensitive?

...o be best: Location: http://stackoverflow.com Content-Type: text/plain vs location: http://stackoverflow.com content-type: text/plain This isn't "HTTP" standard, but just another one of the browser quirks, we as developers, have to think about. ...
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PHP - concatenate or directly insert variables in string

...uch...) 1 - Unless you are doing hundreds of thousands of concatenations vs interpolations -- and it's probably not quite the case. share | improve this answer | follow ...
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How to add System.Windows.Interactivity to project?

... Worked for me. I updated solution from 2015 on VS2019. Thank you. – KulaGGin Oct 15 '19 at 8:20 1 ...
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Windows 8.1 / Windows 10 breaks my ASP.NET / IIS : “Service unavailable”

...See here: https://github.com/aspnet/Home/issues/1583 - Running a repair on VS 2015 Tooling Preview should fix it. Wanted to add it here since the errors are very similar to this answer. share | impr...
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Can I pass parameters by reference in Java?

...s like something built for the job. i don't know about performance of this vs. arrays however, if in a performance critical loop – steveh Apr 7 '13 at 5:43 ...
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What is the difference between DSA and RSA?

... @GregS RSA being able to encrypt vs. DSA not being able to encrypt is mostly an issue of terminology. We call several different algorithms RSA, some of which sign (e.g. RSA-PSS), some of which encrypt (e.g. RSA-OAEP). But we gave every algorithms in group ba...
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How to create a .NET DateTime from ISO 8601 format

...hown below, all is fine. Format String: @"yyyy-MM-dd\THH:mm:ss.fff\Z" In VS2010 Immediate Window: DateTime.TryParseExact(value,@"yyyy-MM-dd\THH:mm:ss.fff\Z", CultureInfo.InvariantCulture,DateTimeStyles.AssumeUniversal, out d); true You may have to use DateTimeStyles.AssumeLocal as well depend...