duplicates | 易学教程

Find all array keys that has same value

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Is there a simpler way to get all array keys that has same value, when the value is unknown. The problem with array_unique is that it returns the unique array and thus it doesn't find unique values. That is, for example, from this array: Array ( [a]=>1000 [b]=>1 [c]=>1000 ) I want to get this Array ( [a]=>1000 [c]=>1000 ) Another way around this is, if I could find the lonely values, and then their keys, and then use array_diff This is what I've got so far, looks awful: $a = array( 'a' => 1000, 'b' => 1, 'c' => 1000 ); $b = array_flip( array_count_values( $a ) ); krsort( $b ); $final = array

ON DUPLICATE KEY UPDATE implementation/design

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问题 I have a table, sessionBasket, that holds a list of the items in the shopping baskets of visitors to my site. It looks like: id INT NOT NULL AUTO_INCREMENT PRIMARY KEY usersessid VARCHAR date_added DATETIME product_id INT qty INT My add to basket script first checks for the presence of an item with the current product_id in this table associated with the usersessid and if it finds one, it updates the qty. If not, a separate query inserts a new row with the relevant information. I have since

Find Duplicate Objects in an java arraylist

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问题 First of all, I would like to say that I have searched for an answer to this, but did not get an suitable solution. So I have decided to post it here. I have an ArrayList of Objects (ArrayList(Provider)). The Provider Object has First Name, Last Name, NPI Number, List (I have not listed all the fields). Provider { private long providerId; private String npiNumber; private PersonName providerName; private List<Address> providerAddresses; } Now I want to find if the ArrayList has duplicates

How can I keep the check state of multiple Virtual Tree View nodes in sync?

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My tree has 2 levels of nodes - it's a Contact List style tree. My problem is, that I would like to have every contact checked, in all the "Contact Categories". Here is a screenshot of my contact list as it looks now (And yes, I have permission to post it) As you see, Todd Hirsch is checked in the Category Test Category , but not in All Contacts . What I am trying to achieve, is to have a contact have the same checked status in every category. Example: I check Todd Hirsch in the Test Category - Todd Hirsch is automatically checked in All Contacts (And every other category). If I check Todd

LINQ to remove duplicate rows from a datatable based on the value of a specific row

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问题 I have seen the following solution used for removing duplicate rows in a DataTable using LINQ : Say if we have a DataTable with duplicate rows called dt , then the following statemend apparently does the job: IEnumerable<DataRow> uniqueContacts = dt.AsEnumerable().Distinct(DataRowComparer.Default); But this is only removing duplicate rows that are identical. What I want to do is to remove all the rows that have duplicate values of a specific row. E.g. If we have a datatable with a row called

Excel: if duplicate cell value found in another column then highlight green

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Can someone help me, I'm not sure what formula to use. I have highlighted the cell in the picture to show an example of what I mean. What I want to do is highlight the cell in column A where the value matches a value in column D, it does not have to be in the same row. If there is a duplicate value in column D then highlight the cell in column A green. Thanks for any help given. Try this as the conditional format formula =MATCH(A1,$D:$D,0) 来源： https://stackoverflow.com/questions/16559207/excel-if-duplicate-cell-value-found-in-another-column-then-highlight-green

How to delete duplicate lines in a file…AWK, SED, UNIQ not working on my file

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I find many ways to do this, AWK , SED , UNIQ , but none of them are working on my file. I want to delete duplicate lines. Here is an example of part of my file: KTBX KFSO KCLK KTBX KFSO KCLK PAJZ PAJZ NOTE: I had to manually add line feeds when I cut and pasted from the file...for some reason it was putting all the variables on one line. Makes me think that my 44,000 line text file actually has only "1" line? Is there a way to modify it so I can delete dups? philshem You can see all non-printed characters with this command: od -c oldfile If all your records are on one line, you can use sed to

Remove duplicates based on two columns

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I have this table, and i would like a SELECT to exclude the lines marked. The general rule would be: IF there are two or more lines where the controlname AND brandname AND grouptypes columns are equal THEN keep the row where groupname is NOT 'Keine Zuordnung'. CONTROLNAME BRANDNAME GROUPTYPES GROUPNAME ECU AUDI VERNETZER 1 ECU AUDI VERNETZER Keine zuordnung <--THIS ECU AUDI FUSI Keine zuordnung <--THIS ECU AUDI FUSI 2 ECU2 AUDI FACHANWENDER Keine zuordnung ECU3 AUDI FACHANWENDER Keine zuordnung Can i have a little help with this please? Thank you! Here is one method: select t.* from (select t.

Tree with no duplicate children

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问题 Using anytree I produced such tree: A ├── B │ └── C │ └── D │ └── F └── B └── C └── E └── G Is there a way to remove all duplicate children and turn it into the tree below (recursive for children at all possible levels)? A └── B └── C ├── D | └── F └── E └── G Edit: What I am trying to achieve is a tree of all links on a website. So everything between slashes would become a child: .../child/... (second slash is optional). The above is just a representation of my problem, but I hope it's clear

How do I put only unique values into an array?

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node_marked_array.add(strings[0]); for (int i = 0; i < strings.length; i++) { for (int a = 0; a < strings2.length; a = a + 2) { if (node_marked_array.get(i).equals(strings2[a])) { if (!node_marked_array.get(i).equals(strings2[a + 1])) { // System.out.println("marked node: " + node_marked_array.get(i) + "=" + strings2[a] + ", added node " + strings2[a+1]); node_marked_array.add(strings2[a + 1]); } } } } I have an array named strings2 of elements each being: 1, 2, 1, 3, 2, 3, 2, 4, 3, 2, 5, 5, 2, and my code is supposed to go through the array and if it matches for example any of the element