hash[ ]

A hash code is a fixed-size numerical value generated from input data of arbitrary size, used primarily for indexing data in hash tables. It allows for efficient data retrieval and storage by mapping variable-length data to a fixed-length representation.

Think of the hash code as a unique digital signature for any data that once even if one bit of that data altered the entire new hash code would be different.

Example: "dara is good lookin" has the hash code:

"0x05ee501e3232083ca0f16b02011944e735f78db170c568c2ea85e56380ddca05"

Counterexample: "dara is good lookin." the ending red dot cause an entire change to the has code above:

"0x4700eceb9e5cbc887ad3dea1833081d51c3572c7886ea9c8a3f30b0c5ad4c614"

hash21 = hash ["dara is good lookin"];
hash2 = hash ["dara is good looking"];

show hash1 also hash2;

save as myhash;

Output

"hash1" → "(0x05ee501e3232083ca0f16b02011944e735f78db170c568c2ea85e56380ddca05)"

"hash2" → "(0x05ee501e3232083ca0f16b02011944e735f78db170c568c2ea85e56380ddca05)"

"hash3" → "(0x4700eceb9e5cbc887ad3dea1833081d51c3572c7886ea9c8a3f30b0c5ad4c614)"