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If I shorten the length of each key name in a hash, will that shorten the read/write time of that hash?


If I shorten the length of each key name in a hash, will that shorten the read/write time of that hash?

By : user2185705
Date : November 22 2020, 04:01 AM
help you fix your problem In short, it would reduce the size but is unlikely to improve performance assuming your key is currently a string, number or symbol and not an object. If your key is a model or other object I recommend changing this as it does add overhead. If we’re talking about the difference between:
code :
{ my_very_long_key_or_something: “”}
{ 1447 => “” }
Benchmark.ms { my_hash.process }


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Write Hash to CSV file and then read the values back to form a hash

Write Hash to CSV file and then read the values back to form a hash


By : Raziel
Date : March 29 2020, 07:55 AM
I wish did fix the issue. From What I have learnt from all the examples and work done to accomplish this I think the best way to go around this type of functionality is to create a rake task to and populate the database with the information and use the information saved to populate the views.
How to shorten a 64-bit hash value down to a 48-bit value?

How to shorten a 64-bit hash value down to a 48-bit value?


By : Khan Mohammad
Date : March 29 2020, 07:55 AM
wish helps you If the 64-bit hash is good, then selecting any 48 bits will also be a good hash. @Lee Daniel. Of course, information is lost and not reversible.
code :
unsigned long long Mask48 = 0xFFFFFFFFFFFFu;
unsigned long long hash48 = hash64 & Mask48;
unsigned long long LargestPrime48 = 281474976710597u;  // FFFFFFFFFFC5
unsigned long long hash48 = hash64 % LargestPrime48;
How to encode and shorten hash for url safety?

How to encode and shorten hash for url safety?


By : bmilo
Date : March 29 2020, 07:55 AM
Does that help Java 8 added Base64 encoders, with different flavors. See java.util.Base64
For example:
code :
Base64.getUrlEncoder().encode(...);
Shorten a 32 char http session id down to 20 chars (truncate? hash?)

Shorten a 32 char http session id down to 20 chars (truncate? hash?)


By : sunny
Date : March 29 2020, 07:55 AM
this will help Each 2 characters in your hex string are an exact fit into a byte. So each character in the output can actually hold 2 input chars. Just traverse the input string, something like this: dst[i] = (src[2*i] << 8) + src[2*i+1]. For input sized 36, you'll get an 18-characters string. That's the maximum lossless compression you can get since this is the maximum you can stuff into a single byte.
Extract Hash Array to several Arrays, shorten code

Extract Hash Array to several Arrays, shorten code


By : Silver
Date : March 29 2020, 07:55 AM
may help you . You could use an object for collecting and later assign the properties to the wanted variables.
This proposal iterates over all elements of the array and over all properties and build a new array if there is no key in the result object. Then add the value to the array.
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