Sorting array of dictionaries with Any value

I have this [[String:Any]], where Every element have this:

["date":Date,"value":CGFloat]

I would like to sort by "date" key.(dates goes up or down)

 let sortedArray = array.sort { ($0["date"] as? Date) < ($1["date"] as? Date) }

Provides errors that I can't compare 2 dates.

asked Nov 25 '18 at 13:52

Curnelious

3,893751103

Convert the values to structs first and stop using Any.

– Sulthan
Nov 25 '18 at 13:58

You are encouraged to use a custom struct, it makes life much easier. And with this syntax you have to use sorted {...

– vadian
Nov 25 '18 at 13:58

3

It is always a good idea to show the exact error messages ...

– Martin R
Nov 25 '18 at 14:31

add a comment |

I have this [[String:Any]], where Every element have this:

["date":Date,"value":CGFloat]

I would like to sort by "date" key.(dates goes up or down)

 let sortedArray = array.sort { ($0["date"] as? Date) < ($1["date"] as? Date) }

Provides errors that I can't compare 2 dates.

asked Nov 25 '18 at 13:52

Curnelious

3,893751103

Convert the values to structs first and stop using Any.

– Sulthan
Nov 25 '18 at 13:58

You are encouraged to use a custom struct, it makes life much easier. And with this syntax you have to use sorted {...

– vadian
Nov 25 '18 at 13:58

3

It is always a good idea to show the exact error messages ...

– Martin R
Nov 25 '18 at 14:31

add a comment |

I have this [[String:Any]], where Every element have this:

["date":Date,"value":CGFloat]

I would like to sort by "date" key.(dates goes up or down)

 let sortedArray = array.sort { ($0["date"] as? Date) < ($1["date"] as? Date) }

Provides errors that I can't compare 2 dates.

asked Nov 25 '18 at 13:52

Curnelious

3,893751103

I have this [[String:Any]], where Every element have this:

["date":Date,"value":CGFloat]

I would like to sort by "date" key.(dates goes up or down)

 let sortedArray = array.sort { ($0["date"] as? Date) < ($1["date"] as? Date) }

Provides errors that I can't compare 2 dates.

swift

asked Nov 25 '18 at 13:52

Curnelious

3,893751103

asked Nov 25 '18 at 13:52

Curnelious

3,893751103

asked Nov 25 '18 at 13:52

Curnelious

3,893751103

asked Nov 25 '18 at 13:52

Curnelious

3,893751103

asked Nov 25 '18 at 13:52

Curnelious

3,893751103

Convert the values to structs first and stop using Any.

– Sulthan
Nov 25 '18 at 13:58

You are encouraged to use a custom struct, it makes life much easier. And with this syntax you have to use sorted {...

– vadian
Nov 25 '18 at 13:58

3

It is always a good idea to show the exact error messages ...

– Martin R
Nov 25 '18 at 14:31

add a comment |

Convert the values to structs first and stop using Any.

– Sulthan
Nov 25 '18 at 13:58

You are encouraged to use a custom struct, it makes life much easier. And with this syntax you have to use sorted {...

– vadian
Nov 25 '18 at 13:58

3

It is always a good idea to show the exact error messages ...

– Martin R
Nov 25 '18 at 14:31

Convert the values to structs first and stop using Any.

– Sulthan
Nov 25 '18 at 13:58

You are encouraged to use a custom struct, it makes life much easier. And with this syntax you have to use sorted {...

– vadian
Nov 25 '18 at 13:58

It is always a good idea to show the exact error messages ...

– Martin R
Nov 25 '18 at 14:31

add a comment |

1 Answer
1

active

oldest

votes

sort is mutating so array need to be var and no return , and either force unwrap or

array.sort { ($0["date"] as! Date  ) < ($1["date"] as! Date   ) }

array.sort { ($0["date"] as? Date ?? Date()  ) < ($1["date"] as? Date ?? Date() ) }

or sorted

let sortedArray  =   array.sorted { ($0["date"] as? Date ?? Date()  ) < ($1["date"] as? Date ?? Date() ) }

Strongly recommend

struct Root { 

  let date:Date 

  let value:CGFloat 

}     





var array = [Root(date: Date(), value: 12),Root(date: Date(), value: 14),Root(date: Date(), value: 15)]



 let sortedArray =   array.sorted {  $0.date < $1.date }



// or



let sortedArray = array.sorted {  $0.date.compare($1.date) == .orderedAscending }

edited Nov 25 '18 at 14:13

answered Nov 25 '18 at 13:55

Sh_Khan

45.2k51432

Thanks , for the first example I get a warning : Variable 'sortedArray' inferred to have type '()', which may be unexpected

– Curnelious
Nov 25 '18 at 14:00

I know Struct is better, but changing to it will require changing the whole code.

– Curnelious
Nov 25 '18 at 14:05

2

The current date (Date()) as default value could cause funny unexpected behavior particularly both values of Date() could be different. 😉

– vadian
Nov 25 '18 at 14:07

Thanks. Can you show please how would you answer this if it was array of Struct ?

– Curnelious
Nov 25 '18 at 14:08

4

@Sh_Khan For a fixed date far far away there is distantPast and distantFuture.

– vadian
Nov 25 '18 at 14:11

|
show 8 more comments

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

sort is mutating so array need to be var and no return , and either force unwrap or

array.sort { ($0["date"] as! Date  ) < ($1["date"] as! Date   ) }

array.sort { ($0["date"] as? Date ?? Date()  ) < ($1["date"] as? Date ?? Date() ) }

or sorted

let sortedArray  =   array.sorted { ($0["date"] as? Date ?? Date()  ) < ($1["date"] as? Date ?? Date() ) }

Strongly recommend

struct Root { 

  let date:Date 

  let value:CGFloat 

}     





var array = [Root(date: Date(), value: 12),Root(date: Date(), value: 14),Root(date: Date(), value: 15)]



 let sortedArray =   array.sorted {  $0.date < $1.date }



// or



let sortedArray = array.sorted {  $0.date.compare($1.date) == .orderedAscending }

edited Nov 25 '18 at 14:13

answered Nov 25 '18 at 13:55

Sh_Khan

45.2k51432

Thanks , for the first example I get a warning : Variable 'sortedArray' inferred to have type '()', which may be unexpected

– Curnelious
Nov 25 '18 at 14:00

I know Struct is better, but changing to it will require changing the whole code.

– Curnelious
Nov 25 '18 at 14:05

2

The current date (Date()) as default value could cause funny unexpected behavior particularly both values of Date() could be different. 😉

– vadian
Nov 25 '18 at 14:07

Thanks. Can you show please how would you answer this if it was array of Struct ?

– Curnelious
Nov 25 '18 at 14:08

4

@Sh_Khan For a fixed date far far away there is distantPast and distantFuture.

– vadian
Nov 25 '18 at 14:11

|
show 8 more comments

sort is mutating so array need to be var and no return , and either force unwrap or

array.sort { ($0["date"] as! Date  ) < ($1["date"] as! Date   ) }

array.sort { ($0["date"] as? Date ?? Date()  ) < ($1["date"] as? Date ?? Date() ) }

or sorted

let sortedArray  =   array.sorted { ($0["date"] as? Date ?? Date()  ) < ($1["date"] as? Date ?? Date() ) }

Strongly recommend

struct Root { 

  let date:Date 

  let value:CGFloat 

}     





var array = [Root(date: Date(), value: 12),Root(date: Date(), value: 14),Root(date: Date(), value: 15)]



 let sortedArray =   array.sorted {  $0.date < $1.date }



// or



let sortedArray = array.sorted {  $0.date.compare($1.date) == .orderedAscending }

edited Nov 25 '18 at 14:13

answered Nov 25 '18 at 13:55

Sh_Khan

45.2k51432

Thanks , for the first example I get a warning : Variable 'sortedArray' inferred to have type '()', which may be unexpected

– Curnelious
Nov 25 '18 at 14:00

I know Struct is better, but changing to it will require changing the whole code.

– Curnelious
Nov 25 '18 at 14:05

2

The current date (Date()) as default value could cause funny unexpected behavior particularly both values of Date() could be different. 😉

– vadian
Nov 25 '18 at 14:07

Thanks. Can you show please how would you answer this if it was array of Struct ?

– Curnelious
Nov 25 '18 at 14:08

4

@Sh_Khan For a fixed date far far away there is distantPast and distantFuture.

– vadian
Nov 25 '18 at 14:11

|
show 8 more comments

sort is mutating so array need to be var and no return , and either force unwrap or

array.sort { ($0["date"] as! Date  ) < ($1["date"] as! Date   ) }

array.sort { ($0["date"] as? Date ?? Date()  ) < ($1["date"] as? Date ?? Date() ) }

or sorted

let sortedArray  =   array.sorted { ($0["date"] as? Date ?? Date()  ) < ($1["date"] as? Date ?? Date() ) }

Strongly recommend

struct Root { 

  let date:Date 

  let value:CGFloat 

}     





var array = [Root(date: Date(), value: 12),Root(date: Date(), value: 14),Root(date: Date(), value: 15)]



 let sortedArray =   array.sorted {  $0.date < $1.date }



// or



let sortedArray = array.sorted {  $0.date.compare($1.date) == .orderedAscending }

edited Nov 25 '18 at 14:13

answered Nov 25 '18 at 13:55

Sh_Khan

45.2k51432

sort is mutating so array need to be var and no return , and either force unwrap or

array.sort { ($0["date"] as! Date  ) < ($1["date"] as! Date   ) }

array.sort { ($0["date"] as? Date ?? Date()  ) < ($1["date"] as? Date ?? Date() ) }

or sorted

let sortedArray  =   array.sorted { ($0["date"] as? Date ?? Date()  ) < ($1["date"] as? Date ?? Date() ) }

Strongly recommend

struct Root { 

  let date:Date 

  let value:CGFloat 

}     





var array = [Root(date: Date(), value: 12),Root(date: Date(), value: 14),Root(date: Date(), value: 15)]



 let sortedArray =   array.sorted {  $0.date < $1.date }



// or



let sortedArray = array.sorted {  $0.date.compare($1.date) == .orderedAscending }

edited Nov 25 '18 at 14:13

answered Nov 25 '18 at 13:55

Sh_Khan

45.2k51432

edited Nov 25 '18 at 14:13

answered Nov 25 '18 at 13:55

Sh_Khan

45.2k51432

answered Nov 25 '18 at 13:55

Sh_Khan

45.2k51432

answered Nov 25 '18 at 13:55

Sh_Khan

45.2k51432

Thanks , for the first example I get a warning : Variable 'sortedArray' inferred to have type '()', which may be unexpected

– Curnelious
Nov 25 '18 at 14:00

I know Struct is better, but changing to it will require changing the whole code.

– Curnelious
Nov 25 '18 at 14:05

2

The current date (Date()) as default value could cause funny unexpected behavior particularly both values of Date() could be different. 😉

– vadian
Nov 25 '18 at 14:07

Thanks. Can you show please how would you answer this if it was array of Struct ?

– Curnelious
Nov 25 '18 at 14:08

4

@Sh_Khan For a fixed date far far away there is distantPast and distantFuture.

– vadian
Nov 25 '18 at 14:11

|
show 8 more comments

Thanks , for the first example I get a warning : Variable 'sortedArray' inferred to have type '()', which may be unexpected

– Curnelious
Nov 25 '18 at 14:00

I know Struct is better, but changing to it will require changing the whole code.

– Curnelious
Nov 25 '18 at 14:05

2

The current date (Date()) as default value could cause funny unexpected behavior particularly both values of Date() could be different. 😉

– vadian
Nov 25 '18 at 14:07

Thanks. Can you show please how would you answer this if it was array of Struct ?

– Curnelious
Nov 25 '18 at 14:08

4

@Sh_Khan For a fixed date far far away there is distantPast and distantFuture.

– vadian
Nov 25 '18 at 14:11

Thanks , for the first example I get a warning : Variable 'sortedArray' inferred to have type '()', which may be unexpected

– Curnelious
Nov 25 '18 at 14:00

I know Struct is better, but changing to it will require changing the whole code.

– Curnelious
Nov 25 '18 at 14:05

The current date (Date()) as default value could cause funny unexpected behavior particularly both values of Date() could be different. 😉

– vadian
Nov 25 '18 at 14:07

Thanks. Can you show please how would you answer this if it was array of Struct ?

– Curnelious
Nov 25 '18 at 14:08

@Sh_Khan For a fixed date far far away there is distantPast and distantFuture.

– vadian
Nov 25 '18 at 14:11

|
show 8 more comments

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