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Add merging method for dictionary #1

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Merged
devxoul merged 1 commit into from
May 31, 2017
Merged

Add merging method for dictionary #1

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7 changes: 7 additions & 0 deletions Sources/Dictionary.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -38,4 +38,11 @@ extension Dictionary {
copy.removeValue(forKey: key)
return copy
}

/// returns a new directory by merging all values for respective keys.
public func merging(_ dictionary: Dictionary<Key, Value>) -> Dictionary<Key, Value> {
var copy = self
dictionary.forEach { copy.updateValue($1, forKey: $0) }
return copy
}
}
5 changes: 5 additions & 0 deletions Tests/ImmutableTests/DictinoaryTests.swift
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Expand Up @@ -54,6 +54,11 @@ class DictionaryTests: XCTestCase {
XCTAssertEqual(["a": 10].removingValue(forKey: "a"), [:])
}

func testMergingValues() {
XCTAssertEqual(["a": 10, "b": 20].merging(["b": 30, "c": 40]),
["a": 10, "b": 30, "c": 40])
}


static var allTests : [(String, (DictionaryTests) -> () throws -> Void)] {
return [
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