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Multi-line commands in GHCi
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@Rog let begins a block; entries in a block are grouped by indentation; and the first non-whitespace character in a block sets the indentation by which they're grouped. Since the first non-whitespace character in the let block above is the a of addTwo, all lines in the block must ...
What do 'statically linked' and 'dynamically linked' mean?
...e at link time so they never change. A dynamically linked file referenced by an executable can change just by replacing the file on the disk.
This allows updates to functionality without having to re-link the code; the loader re-links every time you run it.
This is both good and bad - on one hand...
What is the Haskell response to Node.js?
...ncy isn't hard in Haskell, because most code is pure and so is thread-safe by construction. There are simple communication primitives. It's much harder to shoot yourself in the foot with concurrency in Haskell than in a language with unrestricted side effects.
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ActiveRecord.find(array_of_ids), preserving order
...suggested something like this:
index = Something.find(array_of_ids).group_by(&:id)
array_of_ids.map { |i| index[i].first }
As efficient as it gets besides letting SQL backend do it.
Edit: To improve on my own answer, you can also do it like this:
Something.find(array_of_ids).index_by(&:...
What is WebKit and how is it related to CSS?
...an I use WebKit features in Firefox for example?
Every browser is backed by a rendering engine to draw the HTML/CSS web page.
IE → Trident (discontinued)
Edge → EdgeHTML (clean-up fork of Trident) (Edge switched to Blink in 2019)
Firefox → Gecko
Opera → Presto (no longer uses Presto sinc...
Why am I getting a NoClassDefFoundError in Java?
... "could not find or load main class" is not a Java exception, it is caused by the launcher (which inspects the JAR and the main manifest attribute).
– eckes
Jan 15 '15 at 21:38
2
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Filter Fiddler traffic
...lerik.com/forums/filter-don't-work-on-some-urls
– bobbyalex
Sep 25 '19 at 3:58
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How to configure an existing git repo to be shared by a UNIX group
...isting git repo (a bare one) which has up to this point only been writable by me. I want to open it up to some UNIX user group, foo, so that all members of foo can push to it. I'm aware that I can easily set up a new git repo with:
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Error in finding last used cell in Excel with VBA
... LookIn:=xlFormulas, _
SearchOrder:=xlByRows, _
SearchDirection:=xlPrevious, _
MatchCase:=False).Row
Else
lastrow = 1
End If
End With
Find Last Row in a Table (ListObject)
The same principles apply,...
How do I create delegates in Objective-C?
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@end
Then, in the body, we can check that our delegate handles messages by accessing our delegateRespondsTo struct, rather than by sending -respondsToSelector: over and over again.
Informal Delegates
Before protocols existed, it was common to use a category on NSObject to declare the methods a ...