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What's a concise way to check that environment variables are set in a Unix shell script?
I've got a few Unix shell scripts where I need to check that certain environment variables are set before I start doing stuff, so I do this sort of thing:
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Using Java 8 to convert a list of objects into a string obtained from the toString() method
There are a lot of useful new things in Java 8. E.g., I can iterate with a stream over a list of objects and then sum the values from a specific field of the Object 's instances. E.g.
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Why not be dependently typed?
I have seen several sources echo the opinion that "Haskell is gradually becoming a dependently-typed language". The implication seems to be that with more and more language extensions, Haskell is drifting in that general direction, but isn't there yet.
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Using the RUN instruction in a Dockerfile with 'source' does not work
I have a Dockerfile that I am putting together to install a vanilla python environment (into which I will be installing an app, but at a later date).
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How to make zsh run as a login shell on Mac OS X (in iTerm)?
When zsh is set as a login shell on Mac OS X, when it is started by iTerm, zsh doesn't consider that it's being run as a login shell, although it's started as ‘-zsh’ (‘-’ is put as the first character of arg[0]) which is supposed to mean that it should start as a login shell.
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Converting ISO 8601-compliant String to java.util.Date
I am trying to convert an ISO 8601 formatted String to a java.util.Date .
29 Answers
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Insert a commit before the root commit in Git?
I've asked before about how to squash the first two commits in a git repository.
15 Answers
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PHP: How to remove all non printable characters in a string?
I imagine I need to remove chars 0-31 and 127,
17 Answers
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What does f+++++++++ mean in rsync logs?
I'm using rsync to make a backup of my server files, and I have two questions:
4 Answers
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