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How to sort out by index(0) alphabelically or index(2) of the List<String> in the ArrayList<List<String>&


How to sort out by index(0) alphabelically or index(2) of the List<String> in the ArrayList<List<String>&

By : Rest
Date : November 22 2020, 03:01 PM
With these it helps Both requested sorts could be implemented using Collections.sort(List, Comparator) where a different Comparator would be required for each sought sort.
Specifically, Collections.sort(sortItem, Comparator.comparing(list -> list.get(0))); would sort alphabetically on index 0, Collections.sort(sortItem, Comparator.comparing(list -> list.get(2))); would sort alphabetically on index 2 and Collections.sort(sortItem, Comparator.comparingInt(list -> Integer.valueOf(list.get(2)))); would sort in numerically ascending order on index 2.
code :


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String List with Index and Sort option

String List with Index and Sort option


By : Gábor Pusztafi
Date : March 29 2020, 07:55 AM
like below fixes the issue It sounds like you may just want SortedList or SortedDictionary but it will depend on your exact requirements, which aren't clear at the moment. Both of these classes are always sorted by key - you don't explicitly sort. What do you need to do with the list?
sort list(of string()) using a variable index into string() as key - vb.net

sort list(of string()) using a variable index into string() as key - vb.net


By : Daniel Ramirez
Date : March 29 2020, 07:55 AM
this will help To sort a list of string arrays on a specific index in the array, you use:
code :
Dim index As Integer = 1
list.Sort(Function(x, y) x(index).CompareTo(y(index)))
Dim index As Integer = 1
list.Sort(Function(x, y) comparer.Compare(x(index), y(index)))
How can i sort a List<string> according to the numbers in each string in each index?

How can i sort a List<string> according to the numbers in each string in each index?


By : user2167245
Date : March 29 2020, 07:55 AM
hop of those help? In the end in threadList for example in index 0 i have: , I think I see what you want...
code :
yourList.OrderBy(str => {
    var match = Regex.Match(str, @"^([-+]?\d+)");
    return match.Success ? int.Parse(match.Groups[1].Value) : int.MaxValue;
});
yourList = yourList
    .OrderBy(str => {
        var match = Regex.Match(str, @"^([-+]?\d+)");
        return match.Success ? int.Parse(match.Groups[1].Value) : int.MaxValue;
    })
    .ToList();
How to produce combinations from a list of tuples, containing a string at index 0 and a list at index 1?

How to produce combinations from a list of tuples, containing a string at index 0 and a list at index 1?


By : Porraphit Chuasuk
Date : March 29 2020, 07:55 AM
seems to work fine Given the following list of tuples: , You can use itertools.product:
code :
import itertools
data = [('Serial Number', [12345]), ('Test Points', ['TestpointA', 'TestpointC']), ('Voltage_1', [3.0, 3.3, 3.6, 0.0]), ('Temperature Setpoint', [0, 60]), ('Slew_1', [200, 400, 800, 1600, 3200, 6400])]
params = ['sn', 'tp', 'v1', 'temp', 'slew']
for i in itertools.product(*[b for _, b in data]):
  print('\n'.join(f'{a}:{b}' for a, b in zip(params, i)))
  print('-'*20)
sn:12345
tp:TestpointA
v1:3.0
temp:0
slew:200
--------------------
sn:12345
tp:TestpointA
v1:3.0
temp:0
slew:400
--------------------
sn:12345
tp:TestpointA
v1:3.0
temp:0
slew:800
--------------------
...
def combination(d, current = []):
   if len(current) == len(data):
     yield current
   else:
     for i, a in enumerate(d):
       for c in a: 
         yield from combination(d[i+1:], current = current+[c])


for i in combination([b for _, b in data]):
  print('\n'.join(f'{a}:{b}' for a, b in zip(params, i)))
  print('-'*20)
sn:12345
tp:TestpointA
v1:3.0
temp:0
slew:200
--------------------
sn:12345
tp:TestpointA
v1:3.0
temp:0
slew:400
--------------------
sn:12345
tp:TestpointA
v1:3.0
temp:0
slew:800
--------------------
How to sort a list in ascending order of string index in java

How to sort a list in ascending order of string index in java


By : jmills
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I've created a list in java as following : , Given the list :
code :
List<String> list = Arrays.asList("1.32   bbbb london", "21.1 aaaa nyc", 
                                  "100.10 cccc jaipur", "1.2 test test",
                                  "1.11 test1 test1");
Collections.sort(list, new Comparator<String>() {
    public int compare(String o1, String o2) {
        return Float.compare(Float.parseFloat(o1.split(" ")[0]),
                             Float.parseFloat(o2.split(" ")[0]));
    }
});
Collections.sort(list, (o1, o2) -> 
      Float.compare(Float.parseFloat(o1.split(" ")[0]), Float.parseFloat(o2.split(" ")[0])));
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