Scala Converting Each Array Element to String and Splitting

Question

I have an array loaded in, and been playing around in the REPL but can't seem to get this to work.

My array looks like this:

record_id|string|FALSE|1|
offer_id|decimal|FALSE|1|1,1
decision_id|decimal|FALSE|1|1,1
offer_type_cd|integer|FALSE|1|1,1
promo_id|decimal|FALSE|1|1,1
pymt_method_type_cd|decimal|FALSE|1|1,1
cs_result_id|decimal|FALSE|1|1,1
cs_result_usage_type_cd|decimal|FALSE|1|1,1
rate_index_type_cd|decimal|FALSE|1|1,1
sub_product_id|decimal|FALSE|1|1,1
campaign_id|decimal|FALSE|1|1,1

When I run my command:

for(i <- 0 until schema.length){  
    val convert = schema(i).toString; 
    convert.split('|').drop(2); 
    println(convert);
}

It won't drop anything. It also is not splitting it on the |

Questions seeking debugging help ("why isn't this code working?") must include the desired behavior, a specific problem or error and the shortest code necessary to reproduce it in the question itself. Questions without a clear problem statement are not useful to other readers. — thefourtheye
– thefourtheye, Commented May 29, 2015 at 15:04

dcastro · Accepted Answer · 2015-05-29 14:58:24Z

3

Strings are immutable, and so split and drop don't mutate the string - they return a new one.

You need to capture the result in a new val

val split = convert.split('|').drop(2); 
println(split.mkString(" "));

edited May 29, 2015 at 14:58

answered May 29, 2015 at 14:49

dcastro

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4 Comments

theMadKing Over a year ago

Thanks, I am getting a print out of just this:[Ljava.lang.String;@196f5636 [Ljava.lang.String;@5c850045 [Ljava.lang.String;@1fd4e177 [Ljava.lang.String;@511e5bf4 etc, why is that happening with the new val being created?

thefourtheye Over a year ago

@theMadKing What is the expected output?

theMadKing Over a year ago

I was actually going to use .dropRight(2) and remove the 2 right peices of information between the delimiter

dcastro Over a year ago

@theMadKing that's because split is an array of strings, e.g. Array(FALSE, 1). You might want to println(split.mkString(" ")) instead to make it easier to visualize

elm · Accepted Answer · 2015-05-30 08:04:06Z

0

Consider also defining a lambda function for mapping each item in the array, where intermediate results are passed on with the function,

val res = schema.map(s => s.toString.split('|').drop(2))

answered May 30, 2015 at 8:04

elm

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