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Combine list elements by suffix


Combine list elements by suffix

By : Md. Hafizur Rahman
Date : November 20 2020, 03:01 PM
it fixes the issue Alex answer is short, but uses list.index which has O(n) complexity.
I would suggest a small adaptation with building p as a dictionary, reversing the iteration to emulate how index works (else last indexes are returned when there are more than 1 occurrence).
code :
l1 = ['C_1', 'B_1', 'A']
l2 = ['B_2', 'C_2', 'D']

p = {s[0]:i for i,s in reversed(list(enumerate(l1 + l2)))}
print(sorted(l1 + l2, key=lambda x: (p[x[0]], x)))


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Using LINQ to strip a suffix from a string if it contains a suffix in a list?

Using LINQ to strip a suffix from a string if it contains a suffix in a list?


By : user3176383
Date : March 29 2020, 07:55 AM
around this issue How can I strip a suffix from a string, and return it, using C#/LINQ? Example:
code :
var firstMatchingSuffix = suffixes.Where(myString.EndsWith).FirstOrDefault();
if (firstMatchingSuffix != null)
    myString = myString.Substring(0, myString.LastIndexOf(firstMatchingSuffix));
How do I add a suffix (or prefix) elements of an existing list?

How do I add a suffix (or prefix) elements of an existing list?


By : Belaineh
Date : March 29 2020, 07:55 AM
wish helps you Let's say I have an existing list called myList. , Use lapply and paste0
code :
> lapply(myList, paste0, ".t0")
$list1
[1] "item1.t0" "item2.t0"

$list2
[1] "item3.t0" "item4.t0"
how to combine the elements of a list representing the elements of a Bash command to a new list featuring the equals sym

how to combine the elements of a list representing the elements of a Bash command to a new list featuring the equals sym


By : user3229778
Date : March 29 2020, 07:55 AM
will be helpful for those in need I have a list like the following: , You could use re module here.
code :
>>> commandOptionsAndArguments = ['myBigTool', '--num-callers', '30', '--leak-check', 'full', '--tool', 'memcheck', '--suppressions', 'etc/valgrind-root.supp', '--suppressions', 'Gaudi.supp/Gaudi.supp', '--suppressions', 'oracleDB.supp', '--suppressions', 'valgrindRTT.supp', '--suppressions', 'root.supp/root.supp', '--mySpecialFlag', '$(which python)', '$(which athena.py)', 'athenaConf.pkl']
>>> re.split(r'\s+(?![^()]*\))', re.sub(r'(--\S+)\s+(\w\S+)', r'\1=\2', ' '.join(commandOptionsAndArguments)))
['myBigTool', '--num-callers=30', '--leak-check=full', '--tool=memcheck', '--suppressions=etc/valgrind-root.supp', '--suppressions=Gaudi.supp/Gaudi.supp', '--suppressions=oracleDB.supp', '--suppressions=valgrindRTT.supp', '--suppressions=root.supp/root.supp', '--mySpecialFlag', '$(which python)', '$(which athena.py)', 'athenaConf.pkl']
re.sub(r'(--\S+)\s+(\w\S+)', r'\1=\2', ' '.join(commandOptionsAndArguments))
Append auto-incrementing suffix to duplicated elements of a List

Append auto-incrementing suffix to duplicated elements of a List


By : KnuT42
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Given the following list : , I found it out by myself just after having written this question
code :
val l = List("A", "A", "C", "C", "B", "C")
l.groupBy(identity) // Map(A->List(A,A),C->List(C,C,C),B->List(B))
  .values.flatMap(_.zipWithIndex) // List((A,0),(A,1),(C,0),(C,1),(C,2),(B,0))
  .map{ case (str, i) => s"$str$i"}
How to join a list elements by ',' using streams with ' as prefix and suffix too

How to join a list elements by ',' using streams with ' as prefix and suffix too


By : pick
Date : March 29 2020, 07:55 AM
wish helps you You can actually use Collectors.joining(CharSequence delimiter,CharSequence prefix,CharSequence suffix) and you can look here for the API.
code :
String values = list.stream().collect(Collectors.joining("','", "'", "'"));
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