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Flatten an Array of Arrays in Swift
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Swift >= 3.0
reduce:
let numbers = [[1,2,3],[4],[5,6,7,8,9]]
let reduced = numbers.reduce([], +)
flatMap:
let numbers = [[1,2,3],[4],[5,6,7,8,9]]
let flattened = numbers.flatMap { $0 }
joined:
let numbers = [[1,2,3],[4],[5,6,7...
Fastest way to determine if an integer's square root is an integer
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35 Answers
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Pass Array Parameter in SqlCommand
...eA WHERE Age IN ({Age})");
cmd.AddArrayParameters("Age", new int[] { 1, 2, 3 });
Notice the "{Age}" in the sql statement is the same as the parameter name we are sending to AddArrayParameters. AddArrayParameters will replace the value with the correct parameters.
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MongoDb query condition on comparing 2 fields
....T.find( { $where : "this.Grade1 > this.Grade2" } );
UPD for mongodb v.3.6+
you can use $expr as described in recent answer
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What does `:_*` (colon underscore star) do in Scala?
...ered May 18 '11 at 21:41
user166390user166390
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What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
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James McNellisJames McNellis
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What are the differences between json and simplejson Python modules?
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What does it mean for a data structure to be “intrusive”?
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answered Feb 15 '11 at 13:43
Lasse V. KarlsenLasse V. Karlsen
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Cleaner way to do a null check in C#? [duplicate]
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In a generic way, you may use an expression tree and check with an extension method:
if (!pers...