Nice to meet you
vara=[String]()
a. insert("a", atIndex:0)
a.append("b")
a+=["c"]
Something like
I'd like to have multiple arrays.
varb=[String]]()
a[0].insert("a", atIndex:0)
a[1].append("b")
a[2]+=["c"]
Compilation passed, but
The following error appears in this part:
fatal error:Array index out of rangeWhen I try playground, there is no error, but it does not work.
I don't see many descriptions of multidimensional arrays, so I asked you a question.
Thank you for your cooperation.
The contents of the multidimensional array have not been initialized.
varb: [[String]] = [[], [], []]
b[0].insert("a", atIndex:0)
b[1].append("b")
b[2] = ["c"]
In the Playground of Xcode 6.3, the members of the array appear to be immutable.I don't know if it's a bug, but you have to be careful because the behavior is different from other environments other than Playground.
This is the best way to initialize a two-dimensional array.
var stringArray=[String]]()
US>stringArray.append([String]())
US>stringArray.insert ([String]( ), atIndex: 1)
US>stringArray+=[[["c"]]
US>stringArray[0].append("a")
US>stringArray[1].insert("b", atIndex:0)
US>stringArray[2]+=["d"]
println(stringArray.description)
Output:
[[a], [b], [c, d]]
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