Groovy String class
gstring is the groovy string class which implements some special features. For example, a gstring may contain code which is executed every time the gstring is converted to a string, for instance when it is output.
Questions tagged [gstring]
69 questions
3
votes
1 answer
Groovy how to multi line GStrings for exception messages
What is the standard (or best practice) for Groovy error messages that that shouldn't span over a certain number of characters/line, e.g., 80 characters?
Consider the following (which is working fine)
throw new IOException("""\
A Jenkins…
TommyMason
- 495
- 4
- 13
3
votes
2 answers
Grails accessing nested fields using gstrings
I am trying to access a nested field using gstring but it throws exception groovy.lang.MissingPropertyException
I have two classes
Class Person{
Address address
}
Class Address{
String city
}
Somewhere in my code I am doing,
def person =…
pikachu
- 97
- 1
- 8
3
votes
1 answer
Groovy string interpolation when string is defined before the interpolated variables are defined
I have a similar question to this:
Groovy string interpolation with value only known at runtime
What can be done to make the following work:
def message = 'Today is ${date}, your id is: ${id}';
def date1 = '03/29/2019'
def id1 = '12345'
def result =…
Steve T
- 165
- 11
3
votes
1 answer
Interpolation of variables inside Jenkinsfile
I am asking for help now because I have been struggling with a simple sed command to be called inside a Jenkinsfile that needs a little variable interpolation.
Better showing the command instead of a large explanation:
sh "sed -i -e…
MadJlzz
- 767
- 2
- 13
- 35
3
votes
1 answer
Sending build log as content of the email from a Jenkins Job
I am using Jenking DSL Plugin/Groovy to send email once the job ran successful.
static void sendEmail(Job job, String jobName) {
job.with {
publishers {
extendedEmail {
recipientList('xyzcoders@xyz.com')
…
Swakesh
- 233
- 5
- 15
3
votes
1 answer
Why I cannot get exactly the same GString as was put to map in Groovy?
With the following snippet I cannot retrieve gString from a map:
def contents = "contents"
def gString = "$contents"
def map = [(gString): true]
assert map.size() == 1 // Passes
assert gString.hashCode() == map.keySet().first().hashCode() //…
Michal Kordas
- 10,475
- 7
- 58
- 103
2
votes
2 answers
How does Groovy translate from char[] to String within a GString?
I'm trying to figure out how Groovy translates a char[] to a String within a GString.
Example:
char[] pchar = ['p', 'a', 's', 's']
println "$pchar"
Result:
pass
At first I assumed it would use the toString() method on char[]…
FGreg
- 14,110
- 10
- 68
- 110
2
votes
5 answers
GStrings in Python
Groovy has a concept of GStrings. I can write code like this:
def greeting = 'Hello World'
println """This is my first program ${greeting}"""
I can access the value of a variable from within the String.
How can I do this in Python?
--
Thanks
Parag
- 12,093
- 16
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- 75
2
votes
2 answers
Opening and closing a log file leads to memory leaks in C
Debugging a legacy code. I have a program written in C. it's actually much longer but I have created a small reproducible program to show the issues (please ignore the fact that this program does not make a lot of sense). The program:
#include…
vesii
- 2,760
- 4
- 25
- 71
2
votes
2 answers
Calling a variadic function in a Jenkinsfile fails unpredictably
Context
I'm running Jenkins on Windows, writing declarative pipelines. I'm trying to put multiple commands in a single bat step, while still making the step fail if any of the included commands fail.
Purpose of this is twofold.
The best practices…
Kees-Jan
- 518
- 4
- 16
2
votes
1 answer
Passing variable to be evaluated in groovy gstring
I am wondering if I can pass variable to be evaluated as String inside gstring evaluation.
simplest example will be some thing like
def var ='person.lName'
def value = "${var}"
println(value)
I am looking to get output the value of lastName in…
Amit
- 2,080
- 3
- 19
- 24
2
votes
2 answers
Get variable value for its name in Groovy
I have the following variables defined:
def VAL1 = 'foo'
def VAL2 = 'bar'
def s2 = 'hello ${VAL1}, please have a ${VAL2}'
What is the easiest way to make this substitution work?
How could I build a GString from s2 and have it evaluated?
(VALs and…
jabal
- 11,987
- 12
- 51
- 99
2
votes
2 answers
How to access Jenkinsfile parameters values as strings in a loop
In our Jenkinsfile we have a lot of parameters (parameterized build) and in this case I want to check if each parameter is toggled and act on that. These parameters have similar names but end with a different decimal, so I would like to iterate…
SamGamgee
- 564
- 1
- 4
- 12
2
votes
1 answer
Why are calls to containsKey() failing for this groovy map?
I imagine I'm screwing something up with these declarations, but I've got a groovy class with a field defined like this:
Map _someField = [:]
I do inserts like this:
_someField.put( someStringVariable, someTypeInstance )
...and…
Hoobajoob
- 2,748
- 3
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- 33
2
votes
1 answer
Groovy GString rendering does not call overridden toString() method when parent is Map or Collection
Here is minimal demo case:
class T extends HashMap {
@Override
String toString() {
return "foo"
}
}
def t = new T()
println t.toString()
println "${t}"
The output is
foo
[:]
So the @Override toString() never executed for obtaining…
Dee
- 131
- 1
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