You are trying to do something like:
'12345' = 7 5$'12345'
|length error
| '12345' =7 5$'12345'
J doesn't know how to reconcile the list of 5 items with the list of 7
items (each of which are 5 items long).
You could do:
'12345' ="1 ] 7 5$'12345'
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
But I suspect you want something more like:
'12345' -:"1 ] 7 5$'12345'
1 1 1 1 1 1 1
On Wed, Oct 12, 2011 at 11:51 AM, David Vaughan
<purpleblue...@googlemail.com> wrote:
> Thanks.
>
> I'm trying to get those items which are equal to a specific string, but I
> keep getting length errors, and I'm not quite sure what's going on:
>
> p=.(/:~)&":"0
> (#~ '012334556789' = ]) p 3^~i.9000x
> |length error
> | (#~'012334556789'=])p 3^~i.9000
>
> I've used a similar tacit verb when dealing with numbers, but I guess this
> not working has to do with the fact that it's on strings.
>
> On 11 Oct 2011, at 23:18, Henry Rich wrote:
>
>> (/: 1&{"1)
>>
>>> ./@>@:(1&{"1)
>>
>> there are other ways too
>>
>> Henry Rich
>>
>> On 10/11/2011 6:14 PM, David Vaughan wrote:
>>> I have strings and a numbers in adjacent boxes, like so:
>>>
>>> ┌─────────┬─┐
>>> │0 │1│
>>> ├─────────┼─┤
>>> │1 │1│
>>> ├─────────┼─┤
>>> │8 │1│
>>> ├─────────┼─┤
>>> │27 │1│
>>> ├─────────┼─┤
>>> │46 │1│
>>> ├─────────┼─┤
>>> │125 │2│
>>> ├─────────┼─┤
>>> │126 │1│
>>> ├─────────┼─┤
>>> │334 │1│
>>> ├─────────┼─┤
>>> │279 │1│
>>> ├─────────┼─┤
>>> │0001 │1│
>>> └─────────┴─┘
>>>
>>> How can I do things like sort or>./ on only the second box of each row?
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>> ----------------------------------------------------------------------
>> For information about J forums see http://www.jsoftware.com/forums.htm
>
> ----------------------------------------------------------------------
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