I have two string inputs with that have been split so each item is distinguishable from the other (these items are product properties such as length, weight, finish, stain color, etc.). One string has the original values for the product while the other has the new values (whatever they may be--users can edit whichever product values they want).
Right now, I have the split strings producing the info that I want but I am not sure how to compare the results to each other since the individual product values are inside foreach loops.
This is what I have:
//checks to see which attributes have been changed/edited for the product
protected bool ifAttrChanged(string oldItm, string newItm)
{
bool retVal = false;
//get the original attributes of the product
string[] oldItms = oldItm.Split(',');
foreach (string oItm in oldItms)
{
if (oItm != "")
{
string[] oldThings = oItm.Split(',');
string oldies = oldThings.GetValue(0).ToString();
}
}
//get whatever new values have been entered for the product
string[] newItms = newItm.Split(',');
foreach (string nItm in newItms)
{
if (nItm != "")
{
string[] newThings = nItm.Split(',');
string newbies = newThings.GetValue(0).ToString();
}
}
if (newItms.ToString().Equals(oldItms.ToString(), StringComparison.Ordinal))
{
retVal = false;
Label3.Text += retVal.ToString() + "<br />";
}
else
{
retVal = true;
Label3.Text += retVal.ToString() + "<br />";
}
return retVal;
}
I would really like to compare the oldies string variable with the newbies string variable (weird names but I am not concerned about that) but they are each in their own foreach statement and I cannot access them elsewhere. How can I compare the old and new values of the two split strings successfully so I can obtain which values were changed and which values remained the same?
With all the strings splittend and stored in arrays (oldItems and newItems), and using System.Linq.
Try this:
var changedResults = newItems.Where(x => !oldItems.Any(y => x == y));
With this you will get a IEnumerable with all the string in newItems which no appear in oldItems array.
If you want to convert this to a list or something, add this:
var changedResults = newItems.Where(x => !oldItems.Any(y => x == y)).ToList();
I hope this helps
What is a "change"? Addition? Deletion? Modification?
If only addition, Oscar's method works. This is the same thing (set difference) but a little more concise:
var changedResults = newItems.Except(oldItems)
However, if a deletion is a "change" as well, you would need to consider it from both sides.
var changedResults = newItems.Except(oldItems).Union(oldItems.Except(newItems));
Since the sets are of only strings, there is no notion of modification.
Related
I have a combo-box that contains lots of entries like this small extract
1R09ST75057
1R11ST75070
1R15ST75086
1R23ST75090
2R05HS75063
2R05ST75063
3R05ST75086
2R07HS75086
The user now enters some information in the form that result in a string being produced that has a wildcat (unknown) character in it at the second character position
3?05ST75086
I now want to take this string and search\filter through the combo-box list and be left with this item as selected or a small set of strings.
If I know the string without the wildcat I can use the following to select it in the Combo-box.
cmbobx_axrs75.SelectedIndex = cmbobx_axrs75.Items.IndexOf("2R05HS75063");
I thought I could first create a small subset that all have the first char the same then make a substring of each minus the first two chars and check this but I can have a large amount of entries and this will take too much time there must be an easier way?
Any ideas how I can do this with the wildcat in the string please?
Added info:
I want to end up with the selected item in the Combobox matching my string.
I choose from items on the form and result in string 3?05ST75086. I now want to take this and search to find which one it is and select it. So from list below
1R05ST75086
2R05ST75086
3R05ST75086
6R05ST75086
3R05GT75086
3R05ST75186
I would end up with selected item in Combo-box as
3R05ST75086
You could use regular expressions. Something like this:
string[] data = new string[]
{
"1R09ST75057",
"1R11ST75070",
"1R15ST75086",
"1R23ST75090",
"2R05HS75063",
"2R05ST75063",
"3R05ST75086",
"2R07HS75086"
};
string pattern = "3*05ST75086";
string[] results = data
.Where(x => System.Text.RegularExpressions.Regex.IsMatch(x, pattern))
.ToArray();
You can use a regular expression for this task. First, you need a method to convert your pattern string to Regex like this (it should handle "*" and "?" wildcards):
private static string ConvertWildCardToRegex(string value)
{
return "^" + Regex.Escape(value).Replace("\\?", ".").Replace("\\*", ".*") + "$";
}
Then you will use it like the following:
List<string> comboBoxValues = new List<string>()
{
"1R09ST75057",
"1R11ST75070",
"1R15ST75086",
"1R23ST75090",
"2R05HS75063",
"2R05ST75063",
"3R05ST75086",
"2R07HS75086"
};
string searchPattern = "3?05ST75086";
string patternAsRegex = ConvertWildCardToRegex(searchPattern);
var selected = comboBoxValues.FirstOrDefault(c => Regex.IsMatch(c, patternAsRegex));
if (selected != null)
{
int selectedIndex = comboBoxValues.IndexOf(selected);
}
This assumes you only care about first found match. If you need all matches then substitute FirstOrDefault(...) with Where(...) clause and swap "if" statement with a foreach loop.
Thanks to all that helped I used a combination of items from all answers so everyone helped me answer this.
I added this function from the answers as it seems a good idea, thanks
private static string ConvertWildCardToRegex(string value)
{
return "^" + Regex.Escape(value).Replace("\\?", ".").Replace("\\*", ".*") + "$";
}
Then I get the combo box items into a list. I search the list and make some more decisions based on the result of the search.
List<string> comboBoxValues = new List<string>();
for (int i = 0; i < cmbobx_in_focus.Items.Count; i++)
{
comboBoxValues.Add(cmbobx_in_focus.GetItemText(cmbobx_in_focus.Items[i]));
}
string[] results = comboBoxValues
.Where(x => Regex.IsMatch(x, ConvertWildCardToRegex(lbl_raster_used.Text)))
.ToArray();
I now have array called results which is easy to work with.
I have an ArrayList with multiples items on it, everyone of them is a String divided by commas "loglogs", the three first items are the localization (Destin, lat and long). I need to insert the Strings of these loglogs in buttons depending on its localization (based on that three parameters) in the button Tooltip or text programatically. I have all the button creation but I have to add the strings but there are more loglogs than buttons so...
I need to "filter" the ArrayList into another ArrayList, filter it depending on these three inital coordinates, I want to create another ArrayList but appending the strings that are identical in their three first elements of the arrayList. That way I will combine the "loglogs" into another "loglogsCondensed", with all the "localization" unique so I can add this part to my button and index creation.
foreach (String log in logslogs)
{
String[] colContent = log.Split(','); //splited the content with commas
Loglog log = new Loglog(); //Loglog is a class of logs with information in specific columns
log.Destin = colContent[0];
log.Lat = Convert.ToChar(colContent[1]);
log.Long = colContent[2];
log.Barcode = colContent[6];
log.Source = colContent[7];
log.SampleName = colContent[9];
AllLogs.Add(log);
I need to pass from logslogs with 1000 memebers to an ArrayList with less items, where the ones with the same location based on the three first items are appended as one item.
Suposse this is kind of easy if you know how to code properly (not my case). A thousand thanks only for read this out, even more to the people who try to help.
Best,
I have the solution!, probably is not going to win any contest of cleaneness but it does what I need!. I create an index to filter comparing the items depending of the three coordinates: Destin, Long and Lat. If they are the same I remove the last item and put the appended line in the last place and so on...
int c = 0; //Just to go the first time
//We create an index to compare the former with the "actual"
//log in every loop of the "foreach"
String IndiceDestin0 = string.Empty;
String IndiceLat0 = string.Empty;
String IndiceLong0 = string.Empty;
String IndiceDestin1;
String IndiceLat1;
String IndiceLong1;
foreach (String log in logslogs)
{
String[] LongContent = log.Split(',');
Loglog log = new Loglog();
log.Destin = LongContent[0];
log.Lat = Convert.ToChar(LongContent[1]);
log.Long = LongContent[2];
log.Barcode = LongContent[6];
log.Source = LongContent[7];
log.DestDestinBarcode = LongContent[8];
log.SampleName = LongContent[9];
AllLogs.Add(log);
//This only works once, the first time because we don't have a "former" data to compare we have to bypass the comparison
if (c == 0)
{
IndiceDestin0 = LongContent[0];
IndiceLat0 = LongContent[1];
IndiceLong0 = LongContent[2];
c++;
}
else
{
IndiceDestin1 = LongContent[0];
IndiceLat1 = LongContent[1];
IndiceLong1 = LongContent[2];
if (IndiceDestin0.Equals(IndiceDestin1) && IndiceLat0.Equals(IndiceLat1) && IndiceLong0.Equals(IndiceLong1))
{
int last = logsToButtons.Count - 1;
string oldLog = logsToButtons[last].ToString();
string appendedLog = oldLog + log;
//We remove the last "single" log to add the aggregated log
logsToButtons.RemoveAt(last);
logsToButtons.Add(appendedLog);
}
else
{
logsToButtons.Add(log);
}
IndiceDestin0 = IndiceDestin1;
IndiceLat0 = IndiceLat1;
IndiceLong0 = IndiceLong1;
c++;
}
}
I get to have a shorter version of the array but appending together the ones that have the same coordenates, thank you everybody for your help, I know is messy but it works!
Best,
I have a C# program where I have a list (List<string>) of unique strings. These strings represent the name of different cases. It is not important what is is. But they have to be unique.
cases = new List<string> { "case1", "case3", "case4" }
Sometimes I read some cases saved in a text format into my program. Sometime the a case stored on file have the same name as a case in my program.I have to rename this new case. Lets say that the name of the case I load from a file is case1.
But the trouble is. How to rename this without adding a large random string. In my case it should ideally be called case2, I do not find any good algorithm which can do that. I want to find the smalles number I can add which make it unique.
i would use a HashSet that only accepts unique values.
List<string> cases = new List<string>() { "case1", "case3", "case4" };
HashSet<string> hcases = new HashSet<string>(cases);
string Result = Enumerable.Range(1, 100).Select(x => "case" + x).First(x => hcases.Add(x));
// Result is "case2"
in this sample i try to add elements between 1 and 100 to the hashset and determine the first sucessfully Add()
If you have a list of unique strings consider to use a HashSet<string> instead. Since you want incrementing numbers that sounds as if you actually should use a custom class instead of a string. One that contains a name and a number property. Then you can increment the number and if you want the full name (or override ToString) use Name + Number.
Lets say that class is Case you could fill a HashSet<Case>. HashSet.Add returns false on duplicates. Then use a loop which increments the number until it could be added.
Something like this:
var cases = new HashSet<Case>();
// fill it ...
// later you want to add one from file:
while(!cases.Add(caseFromFile))
{
// you will get here if the set already contained one with this name+number
caseFromFile.Number++;
}
A possible implementation:
public class Case
{
public string Name { get; set; }
public int Number { get; set; }
// other properties
public override string ToString()
{
return Name + Number;
}
public override bool Equals(object obj)
{
Case other = obj as Case;
if (other == null) return false;
return other.ToString() == this.ToString();
}
public override int GetHashCode()
{
return (ToString() ?? "").GetHashCode();
}
// other methods
}
The solution is quite simple. Get the max number of case currently stored in the list, increment by one and add the new value:
var max = myList.Max(x => Convert.ToInt32(x.Substring("case".Length))) + 1;
myList.Add("case" + max);
Working fiddle.
EDIT: For filling any "holes" within your collection you may use this:
var tmp = myList;
var firstIndex = Convert.ToInt32(myList[0].Substring("case".Length));
for(int i = firstIndex; i < tmp.Count; i++) {
var curIndex = Convert.ToInt32(myList[i].Substring("case".Length));
if (curIndex != i)
{
myList.Add("case" + (curIndex + 1));
break;
}
}
It checks for every element in your list if its number behind the case is equal to its index in the list. The loop is stopped at the very first element where the condition is broken and therefor you have a hole in the list.
I'm using the Linq OrderBy() function to sort a generic list of Sitecore items by display name, then build a string of pipe-delimited guids, which is then inserted into a Sitecore field. The display name is a model number of a product, generally around 10 digits. At first it seemed like this worked 100% of the time, but the client found a problem with it...
This is one example that we have found so far. The code somehow thinks IC-30R-LH comes after IC-30RID-LH, but the opposite should be true.
I put this into an online alphabetizer like this one and it was able to get it right...
I did try adding StringComparer.InvariantCultureIgnoreCase as a second parameter to the OrderBy() but it did not help.
Here's the code... Let me know if you have any ideas. Note that I am not running this OrderBy() call inside of a loop, at any scope.
private string GetAlphabetizedGuidString(Item i, Field f)
{
List<Item> items = new List<Item>();
StringBuilder scGuidBuilder = new StringBuilder();
if (i != null && f != null)
{
foreach (ID guid in ((MultilistField)f).TargetIDs)
{
Item target = Sitecore.Data.Database.GetDatabase("master").Items.GetItem(guid);
if (target != null && !string.IsNullOrEmpty(target.DisplayName)) items.Add(target);
}
// Sort it by item name.
items = items.OrderBy(o => o.DisplayName, StringComparer.InvariantCultureIgnoreCase).ToList();
// Build a string of pipe-delimited guids.
foreach (Item item in items)
{
scGuidBuilder.Append(item.ID);
scGuidBuilder.Append("|");
}
// Return string which is a list of guids.
return scGuidBuilder.ToString().TrimEnd('|');
}
return string.Empty;
}
I was able to reproduce your problem with the following code:
var strings = new string[] { "IC-30RID-LH", "IC-30RID-RH", "IC-30R-LH", "IC-30R-RH"};
var sorted = strings.OrderBy(s => s);
I was also able to get the desired sort order by adding a comparer to the sort.
var sorted = strings.OrderBy(s => s, StringComparer.OrdinalIgnoreCase);
That forces a character-by-character (technically byte-by-byte) comparison of the two strings, which puts the '-' (45) before the 'I' (73).
I have a C# method in which I look for certain text say username in a list with element in the format username + datetime and if any part of text matches the element in the list, then the entire element has to be removed from the list
Method to add to the c# List
string active_user = model.UserName.ToString();
string datetime = "(" + DateTime.Now + ")";
List<string> activeUsers = new List<string>();
if (activeUsers.Any(str => str.Contains(active_user)))
{
//do nothing
}
else
{
activeUsers.Add(active_user+datetime);
}
Now I would like a method that deletes the element if it matches the username or any part of element something like
if (activeUsers.Contains(active_user))
{
activeUsers.Remove(active_user);
}
While the other answers are correct, you should note that they will delete any matches. For example, active_user = "John" will remove "John", "John123", "OtherJohn", etc.
You can use regular expressions to test, or if user names don't have parentheses, do your test like this:
string comp = active_user + "("; // The ( is the start of the date part
activeUsers.RemoveAll(u => u.StartsWith(comp));
Also note, this is case sensitive.
You can do something like
activeUsers.RemoveAll(u => u.Contains(active_user));
That will match and remove all elements of activeUser that contain the text in active_user.
var user = activeUsers.FirstOrDefault(au => au.Contains(active_user);
if(user != null)
activeUsers.Remove(user);
if you are only wanting to remove the first match, else :
var users = activeUsers.Where(au => au.Contains(active_user);
foreach(var user in users)
activeUsers.Remove(user);
Or more simply, the RemoveAll method Eric answered with.
If i Want to remove Numeric String Values List Items from my List
List<ModelName> ModelList = new List<ModelName>();
var regex = new Regex(#"\d");
foreach(var item in ModelList.ToList())
{
if (regex.IsMatch(item.PropertyName))
{
ModelList.RemoveAll(t => t.PropertyName== item.PropertyName);//Or
ModelList.RemoveAll(t => t.PropertyName.Contains(item.PropertyName));//Or You Can Use Contains Method
}
}
return ModelList;
This will remove all items from list those having Numeric values as a string and return only Character String in List items