Function arrayIndexStepper

Creates a generator to step through array indices.

Supports moving forward/backward through an array, looping, 'drunken walk', and random step lengths.

const data [ `a`, `b`, `c`, `d`, `e` ];

// Step one by one through each index
for (const index of arrayIndexStepper({step:1, loop:`none`}, data)) {
 console.log(`index: ${index} value: ${data[index]}`);
}
Copy

More examples:

// A generator that never ends, going back and forth between start and end
arrayIndexStepper({ steps: 1, loop: `pingpong` }, data);
// As above, but when we hit the end/start, repeat that index
arrayIndexStepper({ steps: 1, loop: `pingpong`, repeatLoopedIndex:true }, data);

// Move backwards. from the end, through the indicies, jumping by two
arrayIndexStepper({ steps: 2, forward:false }, data);

Copy