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What does the “Just” syntax mean in Haskell?
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It's actually just a normal data constructor that happens to be defined in the Prelude, which is the standard library that is imported automatically into every module.
What Maybe is, Structurally
The definition looks something like this:
data Maybe a = Just a
| Nothing
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In Unix, can I run 'make' in a directory without cd'ing to that directory first?
In Unix, can I run make in a directory without cd 'ing to that directory first?
5 Answers
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IntelliJ IDEA JDK configuration on Mac OS
I am using IntelliJ IDEA 10. Every time when I create a new project, it is asking me to choose JDK for this project. Anyone know how I can configure it and make it easy to use?
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Equal sized table cells to fill the entire width of the containing table
Is there a way using HTML/CSS (with relative sizing) to make a row of cells stretch the entire width of the table within which it is contained?
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proper way to sudo over ssh
I have a script which runs another script via SSH on a remote server using sudo. However, when I type the password, it shows up on the terminal. (Otherwise it works fine)
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Where can I find the TypeScript version installed in Visual Studio?
Maybe it's obvious, but I checked everywhere (besides the right place) and googled it. Nothing.
14 Answers
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How to modify a text file?
...ave indicated, you can append to a file or overwrite part of it using seek but if you want to add stuff at the beginning or the middle, you'll have to rewrite it.
This is an operating system thing, not a Python thing. It is the same in all languages.
What I usually do is read from the file, make t...
What is the worst gotcha in C# or .NET? [closed]
I was recently working with a DateTime object, and wrote something like this:
61 Answers
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Batch renaming files with Bash
How can Bash rename a series of packages to remove their version numbers? I've been toying around with both expr and %% , to no avail.
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When does static class initialization happen?
When are static fields initialized? If I never instantiate a class, but I access a static field, are ALL the static blocks and private static methods used to instantiate private static fields called (in order) at that instant?
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