Custom hash: is object in a dictionary?
I’d like to check if my object is already present in a dictionary based on it’s name. My current implementation does not return expected results, so for sure I am missing something here. My class: @…
Tag: hash
Unhashable type: List error in dictionary invert function
I’m working on a school assignment that asks me to: 1)Take my previously created dictionary and write it to a file as a string. 2)Then import that dictionary to python again and invert it 3)Write the …
Why does Python’s hash of infinity have the digits of π?
The hash of infinity in Python has digits matching pi: >>> inf = float(‘inf’) >>> hash(inf) 314159 >>> int(math.pi*1e5) 314159 Is that just a coincidence or is it …
Confusion Regarding Rolling Hash in Rabin-Karp Algorithm Java
I was trying to understand the Rabin-Karp algorithm here: http://algs4.cs.princeton.edu/53substring/RabinKarp.java.html. I have looked through various articles and I now know that the general form of …
Method for reading bytes into an hexdigest string
I’m reading 16 bytes from a binary buffer named raw: md5 = list(struct.unpack(’16B’, raw.read(16))) This produces the following list: >>> print(md5) >>> [25, 94, 158, 89, 108, 25, …
How to create a laravel hashed password
I am trying to create an hashed password for Laravel. Now someone told me to use Laravel hash helper but I can’t seem to find it or I’m looking in the wrong direction. How do I create a laravel …
PHP Generate an unique hash from an IPADDRESS
I have a board and i want to disable registrations instead i want the users to be able to post freely with an unique ID based on their IPAddress for example: if “Joe” IP is 200.100.15.117, “Joe” …
Calculate MD5 checksum for a file
I’m using iTextSharp to read the text from a PDF file. However, there are times I cannot extract text, because the PDF file is only containing images. I download the same PDF files everyday, and I …
Right way to implement GetHashCode for this struct
I want to use a date range (from one date to another date) as a key for a dictionary, so I wrote my own struct: struct DateRange { public DateTime Start; public DateTime End; …
Can I use Object#hashCode to store the hash of a password?
To save a file i defined the following method public int encrypt(String fileName, String password) { return (fileName.concat(password)).hashCode(); } This returns a hashvalue that is stored in a …