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I have a requirement, that I have a string like below input and I want string like below output. can anyone please help me ?
example 1
val input = "month(start_date),year(to_date),month(to_date)"
output = "start_date,to-date"
example 2
input = "abc(start),xyz(end)"
output = "start,end"
You need a regex to get the value inside parenthesis
val input = "month(start_date),year(to_date),month(to_date)"
val regex = "(?<=\\()[^)]+(?=\\))".r
val output = regex.findAllIn(input).toSet.mkString(",")
for regex explanation you can find it here How do I match the contents of parenthesis in a scala regular expression
toSet to remove the duplicated
and mkString to join the set with comma
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such string:
interface Loopback0 description "Loopback Interface for network management" ip address 10.20.30.40 255.255.255.255 no ip proxy-arp
how to print what is between " "?
Loopback Interface for network management
Assuming that the " character occurs only 2 times or if you want the first pair:
# Get the indices of the " characters
ind1 = exampleStr.find('"')
ind2 = exampleStr.find('"', ind1+1)
# Get the substring between the two indices
result = exampleStr[ind1+1:ind2]
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I am using Powershell and I have a variable like this:
$E = "Apple"
When I run $E[0] I expect to see Apple, but it shows A only. How can I do that?
$E = "Apple" Is not an array, it is a simple string declaration so when you try to get index 0 of that string (or char array) you are returning the first character in the character array:
0 1 2 3 4
[A] [P] [P] [L] [E]
The define an array you need a second item (separated by a comma):
$E = "Apple", "Orange"
Then you can use $E[0] to return Apple like you are wanting.
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I am extracting oracle version from windows using powershell command and i get result as 10.2.0.3.0Patch2, however i need to extract only numeric value i.e. 10.2.0.3.0 (only version number). Any way we can do it ?
Version info extracted is =
10.2.0.3.0 Production, 10.2.0.3.0Patch2 Production, 10.2.0.5.0 Production, 11.2.0.4.0 Production
You can use a regular expression to extract a substring. Example:
"10.2.0.3.0Patch2" | Select-String '((?:\d{1,3}\.){4}\d{1,3})' | ForEach-Object {
$_.Matches[0].Groups[1].Value
}
# Outputs the string '10.2.0.3.0'
You can read more about regular expressions by reading the about_Regular_Expressions help topic:
PS C:\> help about_Regular_Expressions
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i have tried below codes
trial-1
..........
val df2=sqlContext.sql("select concat(' ',Id,LabelName) as 'first last' from p1 order by LabelName desc ");
trial-2
.........
val df2=sqlContext.sql("select concat(' ',Id,LabelName) from p1 order by LabelName desc ");
val df3=df2.toDF("first last")
trial-1 is throwing error when i tried to run it.......but in trial-2 it is taking the command but throwing the error when i performed below action
scala> df3.write.parquet("/prashanth/a1")
When a SQL column contains special characters in a SQL statement, you can use `, such as `first last`.
You cannot use space in a Parquet column. You can either rename the column or use other file format, such as csv.
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How can I detect and show an error if someone put a letter and the program expects a number?
A regexp match makes this easy. Searching for any character which isn't a numeral or an arithmetic symbol:
if ( $input =~ /[^0-9+*/-]/ ) {
print "Incorrect character detected!\n"
}
Literally anything which is a letter:
if ( $input =~ /[A-Za-z]/ ) {
print "Incorrect character detected!\n"
}