dsp-collection/utils/ArrayUtils.js

A collection of JavaScript modules for digital signal processing (written in TypeScript)

export function max(a) {
    if (a.length == 0) {
        return NaN;
    }
    let maxVal = a[0];
    for (let p = 1; p < a.length; p++) {
        if (a[p] > maxVal) {
            maxVal = a[p];
        }
    }
    return maxVal;
}
export function argMax(a) {
    if (a.length == 0) {
        return NaN;
    }
    let maxPos = 0;
    let maxVal = a[0];
    for (let p = 1; p < a.length; p++) {
        if (a[p] > maxVal) {
            maxPos = p;
            maxVal = a[p];
        }
    }
    return maxPos;
}
export function argGte(a, v) {
    for (let p = 0; p < a.length; p++) {
        if (a[p] >= v) {
            return p;
        }
    }
    return NaN;
}
export function multiply(a1, a2) {
    const n = a1.length;
    const a = new a1.constructor(n);
    for (let i = 0; i < n; i++) {
        a[i] = a1[i] * a2[i];
    }
    return a;
}
export function divide(a1, a2) {
    const n = a1.length;
    const a = new a1.constructor(n);
    for (let i = 0; i < n; i++) {
        a[i] = a1[i] / a2[i];
    }
    return a;
}
export function copy(a1, a2) {
    const n = Math.min(a1.length, a2.length);
    for (let i = 0; i < n; i++) {
        a2[i] = a1[i];
    }
}
export function fill(a, value) {
    for (let i = 0; i < a.length; i++) {
        a[i] = value;
    }
}
export function sum(a) {
    let acc = 0;
    for (let i = 0; i < a.length; i++) {
        acc += a[i];
    }
    return acc;
}
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