How to search as a dictionary in C#

Question

I'm try to find the search term in my term collection.

array of term collection :

[0] "windows"
[1] "dual sim"
[2] "32 gb"
[3] "Intel i5"

Now I search bellow term

search term= "32 gb"                 return -> 2 (position of array)
search term ="android 32 gb"         return -> 2 (position of array)
search term ="android mobile 32 gb"  return -> 2 (position of array)
search term= "32 GB"                 return -> 2 (position of array)
search term= "32gb"                  return -> not match 
search term= "dual sim 32"           return -> 1 (position of array)

So how can do like this in C# .net Can any search library or search dictionary provide this feature

Please advise/suggestion for same

Thanks!

What should be returned when the "search term" is "windows 32 gb"? The specification here seems incredibly vague, and of course without any sort of [mcve] it's unclear what you've tried already and what _specific_ difficulty you're having solving this is. — Peter Duniho, Jul 13 '16 at 04:51
If you don't have any code at all, i.e. if you haven't even bothered to try a solution - any solution - you should not post here! — hholtij, Jul 13 '16 at 05:00

Hari Prasad · Accepted Answer · 2016-07-13T05:01:24.260

2

You could use Array.FindIndex and do this.

var array = new string [] {"windows","dual sim","32 gb","Intel i5"};

string searchString = "android 32 gb";
var index = Array.FindIndex(array, x=> searchString.IndexOf(x) >=0);

if you are looking for case insensitive search, use this.

var index = Array.FindIndex(array, x=> searchString.IndexOf(x, StringComparison.CurrentCultureIgnoreCase) >=0);

Check this Demo

edited Jul 13 '16 at 05:01

answered Jul 13 '16 at 04:51

Hari Prasad

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2

This is the only solution so far that matches the requirements, except that you forgot to make the matching case independent. In the last line it should be: x => searchString.ToLower().IndexOf(x.ToLower()) >= 0 – hholtij Jul 13 '16 at 04:54
Also worth noting: this will return the first match. So if your `searchString` ends up as something like `"android dual sim 32 gb"` it will return 1, the index of `dual sim` as that is the index that was hit first. – Jeremy Southard Jul 13 '16 at 05:01
@KalpeshBoghara Can you elaborate? I agree with Jeremy that it matches first index, but I feel that's what requirement says? Am i missing something here? – Hari Prasad Jul 13 '16 at 05:03
@KalpeshBoghara how is this not helpful? Did you view the demo Hari posted? This meets all your requirements. – Jeremy Southard Jul 13 '16 at 05:03
@KalpeshBoghara did you try the second option (case insensitive search)? – Hari Prasad Jul 13 '16 at 05:10
It is working :-). Checkt his [Demo](http://rextester.com/live/SVI88125) – Hari Prasad Jul 13 '16 at 05:20
That's a solution Thanks hari – Kalpesh Boghara Jul 13 '16 at 05:23
@Hari You should be getting paid for this. – Ryan Peters Jul 13 '16 at 10:12

sujith karivelil · Answer 2 · 2016-07-13T05:21:34.423

0

A simple Logic For you: Iterate through your collection(Array) in each iteration check the value with search key, if both are equals The return its Index, else return -1( which means item not found)

public static int GetMatchingIndex(string searchKey)
 {
     string[] MyValues = new string[] { "windows", "dual sim", "32 gb", "Intel i5" };
     for (int i = 0; i < MyValues.Count(); i++)
     {
          if (searchKey.IndexOf(MyValues[i], StringComparison.InvariantCultureIgnoreCase) >= 0)
             return i;
     }
     return -1;
 }

You can call This Method Like the Following(Example Here):

string searchTerm = "32 gb";
int itemIndex= GetMatchingIndex(searchTerm); // This will give 2

edited Jul 13 '16 at 05:21

answered Jul 13 '16 at 04:48

sujith karivelil

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my search term is "android intel i5" and return is -1 that's wrong output should be 3 – Kalpesh Boghara Jul 13 '16 at 05:08
@KalpeshBoghara I had an update in the post, changed the comparison to this: ` if (searchKey.IndexOf(MyValues[i], StringComparison.InvariantCultureIgnoreCase) >= 0)` take a look – sujith karivelil Jul 13 '16 at 05:22

score -1 · Answer 3 · answered Jul 13 '16 at 04:44

-1

int index =  Array.IndexOf(YourCollection,  YourCollection.Where(x=>x.Contains("32 gb")).FirstOrDefault());

answered Jul 13 '16 at 04:44

Sami

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Marcius Bezerra · Answer 4 · 2016-07-13T05:04:50.453

-1

public int SearchArray(string searchTerm) {
    return arrayList.IndexOf(
    arrayList.Cast<string>()
    .FirstOrDefault(i => searchTerm.Contains(i)));
}

edited Jul 13 '16 at 05:04

answered Jul 13 '16 at 04:59

Marcius Bezerra

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Why use ArrayList instead of List or string[] ? Also this solution has unecessary high complexetiy. – CSharpie Jul 13 '16 at 05:09
you should explain better your answer. It is not okay just post code without explanation. OP should understand what answers mean. – StepUp Jul 13 '16 at 06:34

How to search as a dictionary in C#

4 Answers4