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What does the “@” symbol mean in reference to lists in Haskell?
... = Tree a [Tree a], then t@(Tree _ kids) gives you access to both the tree and its children.
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What's the Linq to SQL equivalent to TOP or LIMIT/OFFSET?
...QL, so VB is a viable assumption. That said, ALassek, i'm a c# guy myself and prefer your answer. :-)
– David Alpert
Oct 10 '08 at 16:51
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Why escape_javascript before rendering a partial?
I'm looking at this Railscast episode and wondering why the call to escape_javascript is needed here:
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Request is not available in this context
I'm running IIS 7 Integrated mode and I'm getting
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How to find the size of an array in postgresql
...e trick. Or if you know that the array is 1-dimensional (which is likely) and are running PostgreSQL 9.4 or higher, you can use cardinality:
SELECT cardinality(id) FROM example;
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Gradle - getting the latest release version of a dependency
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Gradle currently does not support Maven's RELEASE (which is rarely used and deprecated) but it does support Ivy's latest.release. However, the general recommendation is to build against exact versions. Otherwise, the build can become a lottery.
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Redis connection to 127.0.0.1:6379 failed - connect ECONNREFUSED
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After you install redis, type from terminal:
redis-server
and you'll have redis running
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Self-references in object literals / initializers
...To complete my above statement, since foo is beeing declared as a variable and c will only be evaluated at the time it is invoked, using foo inside c will work, as opposed to this (be careful though)
– Bernardo Dal Corno
Apr 19 '18 at 20:11
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How to test equality of Swift enums with associated values
...from Swift 4.1 (due to SE-0185, Swift also supports synthesizing Equatable and Hashable for enums with associated values.
So if you're on Swift 4.1 or newer, the following will automatically synthesize the necessary methods such that XCTAssert(t1 == t2) works. The key is to add the Equatable protoc...
Should methods that throw RuntimeException indicate it in method signature?
... API. It is no longer obvious whether the exception has to be explicitly handled.
Declaring it in the javadoc is a better approach since it allows someone to handle it if they think it is necessary, but knowing they can ignore it if they want. This makes the separation between checked and uncheck...