Code:
Hashtable items = new Hashtable();
if (!items.Contains(itemfromlist))
items.Add(itemfromlist, 1);
else
items[itemfromlist] = (int) items[itemfromlist]+1
GTXY20
Last Activity: Apr 14 '08, 07:37 PM
Joined: Oct 1 '07
Location: Toronto
-
Further I was able to do the same using a hashtable:
-
The list of values were kept in a dictionary so I have a dictionary with a key value pair where the value is a list of items.
I ended up placing the items from the value list of the dictionary into two additonal lists a list of distinct values (itemsunique) and then used a foreach loop on a complete list of all the values for all keys in the (allitems):...Code:data = new Dictionary<string, List<string>>
Leave a comment:
-
Count unique values in ArrayList C#
Hi all,
I have an ArrayList1 of multiple values. Here is an exaple of the a potential ArrayList1:
a,a,b,,c,a,b,c, c,c,a,b
Does anyone have any suggestion whereby I could output the count for wach unique item:
a=4
b=3
c=4
I have done this in python with a defaultdict(int ) and was wondering if there was a quick way in C# to do this other than creating another ArrayList2... -
C# reading CSV file to dictionary question
Hi all,
I currently have a CSV file like so
1,a
1,b
1,c
2,a
2,b
2,b
2,c
3,a
3,a
I have used an application in Python whereby it reads the file using split with a comma value in a for loop and using the first field as a key in a dictionary and the second field added to a list which is the value for that key. For each line in the file I check to see... -
Thanks but I am having difficulty assigning the variables to the text file so that if I use split by "," the first variable say a is assigned that value and that will be the key and the next value after the comma is assigned to say variable b and it will be the value for the key - I then need to append to the values where the key is the same when reading the text file and splitting using comma. Something like:
1,a
...Leave a comment:
-
Populate dictionary with text file VB
Hi All,
I have been able to create a successful application with Python but I am being asked to create in VB.
I have a text file with the following data:
1,a
1,b
1,c
2,a
2,a
2,b
3,a
3,c
I need to create a dictionary in VB so that I can then iterate over it so that my key is the first field and my item is the concatenation of unique items... -
Perfect - thank you.Leave a comment:
-
Windows XP os.chdir() path problem...
Hi there,
I have been pulling my hair out with the following error - here is the code:
which gives me the following error:Code:os.chdir("..\data") uhdatafile = open("%s.txt" % self.datafile, 'r')
can...Code:WindowsError: [Error 2] The system cannot find the file specified: 'C:\\Documents and Settings\\HHG\\Desktop\\Reportsdata
-
Thanks so much - I get it - this seems to work.
When my queries are finalized I will post.Leave a comment:
-
Select Unique ID with only a set of values
Hello all;
If I have the following data:
ID Value
1 A
1 B
2 A
2 B
2 C
3 A
3 B
How would I go about only selecting the ID's that have only have the combination of values A & B - so my select query woud return:
ID Value
1 A
1 B
3 A
3 B... -
Oh I understand, thanks.
In order to remove these 'bad' entries I am thinkig of putting the follwing in after the dictionary is created to remove:
Code:for key in d: d[key]['v2'].remove('bad')Leave a comment:
-
actually the code reads as follows but I am still having the same problem:
...Code:infile = open('input.txt', 'r') records = infile.read() infile.close() lines = records.split() d={} for line in lines: uh, tf, tp = line.split('%') if uh in d: f=d[uh]['v1'] if tf not in f: f.append(tf) p=d[uh]['v2'] if tp isLeave a comment:
-
Creating a nested dictionary...
hello all,
I have the following text file:
1,a,good
1,a,bad
1,b,good
1,c,bad
would like to create a dictionary:
have been trying:Code:d={1:{'v1':(a,b,c), 'v2':(good)}}
...Code:for line in lines: uh, tf, tp = line.split('%') if uh in d: f=d[uh]['v1'] if tf not in f: f.append(tf) -
Associating tuple values to a dictionary key and subsequent values
Have a little bit of a problem:
I have the following dictionaries:
I use the following to output:Code:d={'1': ['a', 'b', 'c', 'd'], '3': ['a', 'b', 'c', 'd'], '2': ['a', 'b', 'c', 'd'], '4': ['a', 'c']} update={'a': 10, 'c': 4, 'b': 5, 'd': 1}
...Code:Combqtyoutfile = open('Combqty.txt', 'w') Combqtyoutfile.write('Qty\tNumber\tCombination\n') from collections -
Perfect!
Thanks so much.Leave a comment:
-
Sum values stored in a dictionary as a list of values.
Hi All,
I have the following dictionary:
I need to sum the values for each key and make the dictionary:Code:{'1': [10, 5, 4, 1], '3': [10, 5, 4, 1], '2': [10, 5, 4, 1], '4': [10, 4]}
I have tried:Code:{'1': [20], '3': [20], '2': [20], '4': [14]}
...Code:for item in f.values(): for items in item: sum -
2.4 version works great!
Thank you.Leave a comment:
-
Thanks!
I am actually using PythonWin 2.5.1.
Will this cause any problems - I am away from my workstation.Leave a comment:
-
Create dictionary from another dictionary
Hello;
I have the following dictionary:
I am having trouble removing the duplicate values in each of the keys value list, I need it so that:Code:d={1:[a,b,b], 2:[a,a,b,c], 3:[a,b,c], 4:[a,c]}
[CODE]d={1:[a,b], 2:[a,b,c], 3:[a,b,c], 4:[a,c]}{/CODE]
I was thinking of that I would need to import the sets module??? -
Hi.
I was able to work out with the following:
Thanks again.Code:def UnitHolderDistributionqty(dictionary): from collections import defaultdict count=defaultdict(int) for item in dictionary.values(): count[len(item)]+=1 for k,v in sorted(count.items()): fdist=k qty=v print fdist,qtyLeave a comment:
No activity results to display
Leave a comment: