Very new to Swift
I have a multidimensional array of some 500 records
[10, 2, 4, 10, 23, 56]
[0, 12, 14, 20, 28, 42]
[0, 2, 4, 10, 26, 54]
[1, 24, 34, 40, 47, 51]
[1, 23, 24, 30, 33, 50]
so that I would have
[0, 2, 4, 10, 26, 54]
[0, 12, 14, 20, 28, 42]
[1, 23, 24, 30, 33, 50]
[1, 24, 34, 40, 47, 51]
[10, 2, 4, 10, 23, 56]
I am fine for the individual record sort.
But when looking at the 500 records, to sort the records for the first column I used
arr.sort { $0[0] < $1[0] }.
which worked fine, I need to extend that to columns 2,3,4,5,6. I want to be able to sort on Column 1 then by 2, by 3, by 4, by 5, by 6.
Assuming that all subarrays contains 6 elements you can use a tuple (which conforms to Comparable to an arity of 6) to sort your array:
let array = [[10, 2, 4, 10, 23, 56],
[0, 12, 14, 20, 28, 42],
[0, 2, 4, 10, 26, 54],
[1, 24, 34, 40, 47, 51],
[1, 23, 24, 30, 33, 50]]
let sorted = array.sorted(by: {
($0[0],$0[1],$0[2],$0[3],$0[4],$0[5]) < ($1[0],$1[1],$1[2],$1[3],$1[4],$1[5])
})
print(sorted) // [[0, 2, 4, 10, 26, 54],
// [0, 12, 14, 20, 28, 42],
// [1, 23, 24, 30, 33, 50],
// [1, 24, 34, 40, 47, 51],
// [10, 2, 4, 10, 23, 56]]
I have an array of Arrays and an Array of Integers and want to create a dictionary with the Integers Array elements as keys to elements in the Array of Array.
I have tried a number of iteration methods without much luck. Any thoughts or ideas?
var populationArray = [[98, 8, 45, 34, 56], [9, 13, 65, 4, 90], [24, 5, 4, 56, 88], [3, 55, 22, 19, 10], [8, 33, 26, 93, 16], [31, 38, 92, 70, 36], [9, 39, 15, 14, 66]]
var IntegerKeys = [17, 41, 10, 34, 5, 85, 87]
var Dictionary : [Int: [Int]] = [:]
Try this:
var populationArray = [[98, 8, 45, 34, 56], [9, 13, 65, 4, 90], [24, 5, 4, 56, 88], [3, 55, 22, 19, 10], [8, 33, 26, 93, 16], [31, 38, 92, 70, 36], [9, 39, 15, 14, 66]]
var IntegerKeys = [17, 41, 10, 34, 5, 85, 87]
var Dictionary = [Int: [Int]]()
// Swift 2.0
for (index, key) in IntegerKeys.enumerate() {
Dictionary[key] = populationArray[index]
}
// Swift 1.2
for (index, key) in enumerate(IntegerKeys) {
Dictionary[key] = populationArray[index]
}
#ZoffDino's answer does work, however it would crash if the populationArray would contain less elements than integerKeys. I'm proposing a method that doesn't have this flaw:
var populationArray = [[98, 8, 45, 34, 56], [9, 13, 65, 4, 90], [24, 5, 4, 56, 88], [3, 55, 22, 19, 10], [8, 33, 26, 93, 16], [31, 38, 92, 70, 36], [9, 39, 15, 14, 66]]
var IntegerKeys = [17, 41, 10, 34, 5, 85, 87]
var dictionary : [Int: [Int]] = [:]
for (key, value) in zip(IntegerKeys, populationArray) {
dictionary[key] = value
}
i know this sounds silly, but can someone please post the arrays described by rfc2612:
Cm = 0x5A827999
Mm = 0x6ED9EBA1
Cr = 19
Mr = 17
for (i=0; i<24; i++)
{
for (j=0; j<8; j++)
{
Tmj_(i) = Cm
Cm = (Cm + Mm) mod 2**32
Trj_(i) = Cr
Cr = (Cr + Mr) mod 32
}
}
i think im doing is wrong for some reason
i get this for Tr
[[10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2],
[10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2],
[10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2],
[10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2],
[10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2],
[10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2],
[10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2],
[10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2]]
Tr0 = { 19, 27, 3, 11, 19, 27, 3, 11, 19, 27, 3, 11, 19, 27, 3, 11, 19, 27, 3, 11, 19, 27, 3, 11 }
Tr1 = { 4, 12, 20, 28, 4, 12, 20, 28, 4, 12, 20, 28, 4, 12, 20, 28, 4, 12, 20, 28, 4, 12, 20, 28 }
Tr2 = { 21, 29, 5, 13, 21, 29, 5, 13, 21, 29, 5, 13, 21, 29, 5, 13, 21, 29, 5, 13, 21, 29, 5, 13 }
Tr3 = { 6, 14, 22, 30, 6, 14, 22, 30, 6, 14, 22, 30, 6, 14, 22, 30, 6, 14, 22, 30, 6, 14, 22, 30 }
Tr4 = { 23, 31, 7, 15, 23, 31, 7, 15, 23, 31, 7, 15, 23, 31, 7, 15, 23, 31, 7, 15, 23, 31, 7, 15 }
Tr5 = { 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24, 0 }
Tr6 = { 25, 1, 9, 17, 25, 1, 9, 17, 25, 1, 9, 17, 25, 1, 9, 17, 25, 1, 9, 17, 25, 1, 9, 17 }
Tr7 = { 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2 }
..and Tm (in hex):
Tm0 = { 5a827999, d151d6a1, 482133a9, bef090b1, 35bfedb9, ac8f4ac1, 235ea7c9, 9a2e04d1, 10fd61d9, 87ccbee1, fe9c1be9, 756b78f1, ec3ad5f9, 630a3301, d9d99009, 50a8ed11, c7784a19, 3e47a721, b5170429, 2be66131, a2b5be39, 19851b41, 90547849, 723d551 }
Tm1 = { c95c653a, 402bc242, b6fb1f4a, 2dca7c52, a499d95a, 1b693662, 9238936a, 907f072, 7fd74d7a, f6a6aa82, 6d76078a, e4456492, 5b14c19a, d1e41ea2, 48b37baa, bf82d8b2, 365235ba, ad2192c2, 23f0efca, 9ac04cd2, 118fa9da, 885f06e2, ff2e63ea, 75fdc0f2 }
Tm2 = { 383650db, af05ade3, 25d50aeb, 9ca467f3, 1373c4fb, 8a432203, 1127f0b, 77e1dc13, eeb1391b, 65809623, dc4ff32b, 531f5033, c9eead3b, 40be0a43, b78d674b, 2e5cc453, a52c215b, 1bfb7e63, 92cadb6b, 99a3873, 8069957b, f738f283, 6e084f8b, e4d7ac93 }
Tm3 = { a7103c7c, 1ddf9984, 94aef68c, b7e5394, 824db09c, f91d0da4, 6fec6aac, e6bbc7b4, 5d8b24bc, d45a81c4, 4b29decc, c1f93bd4, 38c898dc, af97f5e4, 266752ec, 9d36aff4, 14060cfc, 8ad56a04, 1a4c70c, 78742414, ef43811c, 6612de24, dce23b2c, 53b19834 }
Tm4 = { 15ea281d, 8cb98525, 388e22d, 7a583f35, f1279c3d, 67f6f945, dec6564d, 5595b355, cc65105d, 43346d65, ba03ca6d, 30d32775, a7a2847d, 1e71e185, 95413e8d, c109b95, 82dff89d, f9af55a5, 707eb2ad, e74e0fb5, 5e1d6cbd, d4ecc9c5, 4bbc26cd, c28b83d5 }
Tm5 = { 84c413be, fb9370c6, 7262cdce, e9322ad6, 600187de, d6d0e4e6, 4da041ee, c46f9ef6, 3b3efbfe, b20e5906, 28ddb60e, 9fad1316, 167c701e, 8d4bcd26, 41b2a2e, 7aea8736, f1b9e43e, 68894146, df589e4e, 5627fb56, ccf7585e, 43c6b566, ba96126e, 31656f76 }
Tm6 = { f39dff5f, 6a6d5c67, e13cb96f, 580c1677, cedb737f, 45aad087, bc7a2d8f, 33498a97, aa18e79f, 20e844a7, 97b7a1af, e86feb7, 85565bbf, fc25b8c7, 72f515cf, e9c472d7, 6093cfdf, d7632ce7, 4e3289ef, c501e6f7, 3bd143ff, b2a0a107, 296ffe0f, a03f5b17 }
Tm7 = { 6277eb00, d9474808, 5016a510, c6e60218, 3db55f20, b484bc28, 2b541930, a2237638, 18f2d340, 8fc23048, 6918d50, 7d60ea58, f4304760, 6affa468, e1cf0170, 589e5e78, cf6dbb80, 463d1888, bd0c7590, 33dbd298, aaab2fa0, 217a8ca8, 9849e9b0, f1946b8 }
(I'm not sure why they didn't just include these as tables in the spec).