Checksum generates, runs, and maintains end-to-end tests automatically so your team ships with confidence as code output grows.
Coding agents write the code. Checksum runs it—continuously testing against real APIs, real data, real edge cases—before it ever reaches production.
Learn More
GR4VY: Payment Orchestration Platform
Payment orchestration platform that connects PSPs, methods, and tools in one layer, streamlining payments and increasing success rates.
Gr4vy’s payment orchestration platform empowers enterprise merchants and platforms to optimize their stack and create bespoke checkout experiences, giving you full control over your payment strategy.
sparse and dense matrix, linear algebra, visualization, big data
The Universal Java Matrix Package (UJMP) is an open source Java library which provides sparse and dense matrix classes, as well as a large number of calculations for linear algebra such as matrix multiplication or matrix inverse. Operations such as mean, correlation, standard deviation, replacement of missing values or the calculation of mutual information are supported, too.
Small program for fitting a Bezier curve to a sequence of points
This program uses a least-squares approach, similar to linear regression, for fitting a Bezier curve to a sequence of Cartesian coordinate points. This project requires the UJMP package which is freely available online here https://sourceforge.net/projects/ujmp/.
For an explanation of the math behind this code please check out my blog post: http://jimherold.com/2012/04/20/least-squares-bezier-fit/