searches by day month and year in groovy - list

Question

I need to search for all orders with shipDate in October. It should show 1st and 2nd row.
CSV file example:
product_name, shipdate , arrivedate, prize
apple, 10/09/2017, 11/09/2017, 100
mango, 10/26/2017 ,11/09/2017, 200
pineapple, 12/10/2017, 12/20/2017, 200
Code which is working:
def reader = new StringReader('''product_name,shipdate,arrivedate,prize
apple,10/09/2017,11/09/2017,100
mango,10/26/2017,11/09/2017,200
pineapple,12/10/2017,12/20/2017,200
''')
def headers=null
reader.splitEachLine(','){line->
//remove spaces
line=line.collect{it.trim()}
if(headers==null){
//convert headers array to [name:index] map
headers = line.withIndex().collectEntries()
}else{
//print line only when you have a valid value in line
if( line[ headers['product_name'] ]=='apple'){
println line
}
}
}

Answer 1

Have a look at the following piece of code:
def input = '''product_name,shipdate,arrivedate,prize
apple,10/09/2017,11/09/2017,100
mango,10/26/2017,11/09/2017,200
pineapple,12/10/2017,12/20/2017,200
'''
def lines = input.split('\n')[1..-1] // skip headers
def data = lines.collect { it.split(',') } // split row into list
def shippedInOctober = data.findAll { new Date().parse('MM/dd/yyyy', it[1]).month == 9 } // find particular data
You can use some 3rd party libs, like opencsv to parse the CSV file itself.

Answer 2

Consider the following use of the groovycsv library (in this example, data.csv contains the data):
#Grab('com.xlson.groovycsv:groovycsv:1.2')
import com.xlson.groovycsv.CsvParser
def file = "data.csv"
def text = new File(file).getText()
def data = CsvParser.parseCsv text
def results = []
data.each { def line ->
def shippingDate = line.getAt(1).trim()
// this could be more robust
if (shippingDate ==~ /10.*/) {
results << line.values.join(",")
}
}
println "# results: "
results.each { println it }