JavaScript Array Manipulations

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Release: 2024-09-01 21:13:02
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JavaScript Array Manipulations

Manipulating 2d, 3d, or 4d arrays in JavaScript are necessary for AI model training and image/audio/video analysis.

Below are a few useful functions for array manipulation using pure JavaScript without matrix packages like Tensorflow.js.

Transpose of a 2d array

function transpose_2d_array(arr) { var transpose_colNum = arr.length; var transpose_rowNum = arr.at(0).length; var transpose_arr = []; for (var i=0; i 0); transpose_arr.push(col); } for (var i=0; i
        
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Print the Shape of an array

async function recur_func(arr) { if (arr != undefined) { return [arr[0], arr.length]; } else { return arr; } } async function shape(arr) { var out = await recur_func(arr); var shap = [out[1]]; var c = 0; // typically work with 4D arrays or less while (out != undefined && c < 4) { out = await recur_func(out[0]); if (out != undefined) { shap.push(out[1]); } c = c + 1; } return shap.slice(0, shap.length-1); }
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I hope these array utility functions will be helpful to someone.

Happy practicing! ?

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source:dev.to
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