product_index

A tool for get the ND indicies of a grid from a 1D index.

Usage

arr1=($(seq 1 1 5))
arr2=($(seq 1 1 6))

N=12

# prints 2 0
product_index $N "${#arr1[@]}" "${#arr2[@]}" 

# stores i1=2 i2=0
read -r i1 i2 <<< $(product_index $N "${#arr1[@]}" "${#arr2[@]}")

# Prints 3,1
echo "x,y = ${arr1[$i1]}, ${arr2[$i2]}"

Installation

To install from crates: cargo install product_index

To install manually, clone the repo and use cargo install --path .

Step by step Manual Install

1. If cargo is not installed, install the rust compilers:

   curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
   

   (See https://www.rust-lang.org/tools/install for more options)
2. Clone the repo:

   git clone https://github.com/chappertron/product_index.git
   

3. cd into the repo folder
4. Run the cargo install command:

   cargo install --path . 
   

You should now be able to access the product_index binary from the command line.