Skip to content
Advertisement

Tag: duplicates

Duplicating each character for all permutations of a string

This is a slightly odd/unique request. I am trying to achieve a result where e.g “yes” becomes, “yyes”, “yees”, “yess”, “yyees”, “yyess”, “yyeess”. I have looked at this: Find all lowercase and uppercase combinations of a string in Javascript which completes it for capitalisation, however my understanding is prohibiting me from manipulating this into character duplication (if this method is

JavaScript: check if duplicate key values exist in array of objects and remove all but most recently added object having that key value

I’m trying to figure out how to check for duplicate values of keys between objects in the same array, then only keep the most recently added object having that value. For example, I have an array of objects I’m trying to filter duplicates of m_id out of, like so: The desired result from the above example array of objects would

Mongoose Return Error Code 11000 duplicate index

i am using mongoose as database for my project, now i am struggling with add data to multiple collections and this is my route router.post(‘/’,add_new_user_to_specific_collection,add_new_user_to_collection_User); this is code of middleware add_new_user_to_specific_collection: and this is for add_new_user_to_collection_User: the input data is totally validated, and at the first try, it worked perfectly, but when it comes to the second times, i got

Advertisement