Remove hash keys having values less than 1000

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I have a hash like this:

my_hash = {"Ace"=>1678.987, "Token"=>389, "Coin"=>17.765,
           "Zowo"=>2020, "Zerlam"=>42, "Ksoz"=>26366.5}

and want to create a new hash comprised of keys-value pairs of my_hash having values less than 1000:

{"Token"=>389, "Coin"=>17.765, "Zerlam"=>42}

How can I do that?

Try this:

new_hash = my_hash.select {|_, value| value < 1000 }

delete (Hash), Deletes the key-value pair and returns the value from hsh whose key is equal to key. If the key is not found, it returns nil. If the optional code block is given and� Idera uses cookies to improve user experience. By using our community you consent to all cookies in accordance with our Cookie policy. Cookie policy.

You can use the Hash#reject method. Assuming that all values can be compared to 1000 (ie they are not strings nor nils):

new_hash = my_hash.reject{|key, value| value >= 1000}

[PDF] A Fast, Minimal Memory, Consistent Hash Algorithm, that servers can be added or removed without having to totally reorganize the data. s experiments used 1000 points per bucket to get to a standard deviation of Here are examples of the consistent hash values for three keys, k1, k2, and k3, The while loop visits successive jump destinations, which are all less than the� @Jake T => I wrote a comment about the name hash, which is short for "hash table", which is short for "a data structure implemented with a hashing function used to map arbitrary strings to the indices of an array of buckets, each containing a short linked list of the key value pairs, which are compared using string comparison to the requested key.

I've found !

new_hash = my_hash.delete_if {|k, v| v > 1000}

Array list formulas, A hash is a dictionary-like collection of unique keys and their values. They are similar to Jill, jill@nbc.com, MA, NBC, 1000 Less than or equal to, <= leads. where('company_revenue <=": 10000) Retrieves only the columns which have been specified. Returns a list containing unique items i.e. remove duplicate items. The keys and values of the hash table serve as elements of the sequence (i.e., each element is a key and its associated value). If a mapping is added to or removed from the hash table during iteration, then an iteration step may fail with exn:fail:contract , or the iteration may skip or duplicate keys and values.

6.5. Hashing — Problem Solving with Algorithms and Data Structures, If every item is where it should be, then the search can use a single Once the hash values have been computed, we can insert each item into the hash The advantage is that on the average there are likely to be many fewer items in del Delete the key-value pair from the map using a statement of the form del map[key ] . While you can look up the value for a given key in time, looking up the keys for a given value requires looping through the whole dataset— time. Not cache-friendly . Many hash table implementations use linked lists , which don't put data next to each other in memory.

Built-in function reference, When the first argument is a Hash , Puppet passes each key and value pair to the Returns a new string with the record separator character(s) removed. return a hash of all keys that both end with "berry" and have # values less than or equal (((((days * 24 + hours) * 60 + minutes) * 60 + seconds) * 1000 + milliseconds)� Probably it is 4 years later, but I hope it will help somebody later. As mentioned earlier in the post, it is not possible to use the same key for different values in Hashtable(key, value). Although, you may create a List or some object as a value in the key/value pair of HashTable.

Maintaining Partitions, To disable interval partitioning on the transactions table, use: table, you can only add subpartitions to range or interval partitions that have been materialized. ALTER TABLE sales ADD PARTITION q1_2000 VALUES LESS THAN (2000, 04, 01) The database adds hash partitions and populates them with index entries� Note: The keys in a dictionary have to be hashable. Hashing is the process of running an item through a specific kind of function. This function is called a "hash function". This hash function returns a unique output for a unique input value. Integers, floating point numbers, strings, tuples, and frozensets are hashable.

Comments
  • When asking we need to see your effort toward solving the problem. You gave us an invalid hash definition and a required result in another invalid hash definition but nothing show us what you'd tried, which means we'd have to write a tutorial to explain everything. "Stack Overflow question checklist" and "Writing The Perfect Question" are important reading. Notice, it took you 13 minutes to find the solution which implies you didn't try hard enough.
  • You want value >= 1000.
  • The OP wants to create a new hash. This modifies my_hash in place.