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Accessing inactive union member and undefined behavior?

... is an incomplete type, a program that necessitates this conversion is ill-formed. If the object to which the glvalue refers is not an object of type T and is not an object of a type derived from T, or if the object is uninitialized, a program that necessitates this conversion has undefined behavio...
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What should every developer know about databases? [closed]

...l design. The next thing developers need to learn is that while speed (performance) is important, other measures of design goodness are even more important, such as the ability to revise and extend the scope of the database down the road, or simplicity of programming. Finally, anybody who mess...
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Is 'switch' faster than 'if'?

... like this -- note that the compiler in practice would need to insert some form of if test around the table to ensure that the input was valid in the table. Note also that it only works in the specific case that the input is a run of consecutive numbers. If the number of branches in a switch is ext...
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Convert JavaScript string in dot notation into an object reference

...a sign that there is something very wrong going on (unless maybe you're performing some strange deserialization). That is to say, novices who find their way to this answer must ask themselves the question "why am I doing this?" It is of course generally fine to do this if your use case is ...
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What is the difference between canonical name, simple name and class name in Java Class?

...operations but is not guaranteed to be unique. the type name returns "an informative string for the name of this type", "It's like toString(): it's purely informative and has no contract value" (as written by sir4ur0n) shar...
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How do search engines deal with AngularJS applications?

...t;meta name="fragment" content="!"> Google will not index them in this form, but will instead pull a static version of the site from the _escaped_fragments_ URL and index that. Pushstate URLs look like any ordinary URL: domain.com/path/to/resource The difference is that Angular handles them ...
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How to read the output from git diff?

... --git a/builtin-http-fetch.c b/http-fetch.c is a "git diff" header in the form diff --git a/file1 b/file2. The a/ and b/ filenames are the same unless rename/copy is involved (like in our case). The --git is to mean that diff is in the "git" diff format. Next are one or more extended header lines...
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docker mounting volumes on host

...ever, the manual mentions that you can provide a named volume to -v in the form of named-volume:/path/in/container. Unnamed volumes are given hashes for names and those hashes can be provided instead of a host-path to access orphaned volumes. :) Be aware volume ls may not show them all - try docker ...
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What MIME type should I use for CSV?

...crosoft Excel generically (i.e., independent of version, subtype, or platform format). I wasn't aware that vendor extensions were allowed. Check out this answer to find out more - thanks starbeamrainbowlabs for the reference. ...
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Favorite (G)Vim plugins/scripts? [closed]

...nd to open files and directories. It presents the filesystem to you in the form of a tree which you manipulate with the keyboard and/or mouse. It also allows you to perform simple filesystem operations. The tree can be toggled easily with :NERDTreeToggle which can be mapped to a more suitable key....