vectorized rung builder

src/vector.js

@@ -0,0 +1,58 @@
+export function vectorize(value) {
+    if (value === undefined) {
+        console.warn('vectorizing undefined as null')
+        return null
+    }
+    if (value === null)
+        return null
+    if (value.length === undefined)
+        value = [value]
+    return value;
+}
+
+export function devectorize(value) {
+  return value === null || value.length === 0 ? null : value.length === 1 ? value[0] : value
+}
+
+
+export function vectorIsNull(value) {
+    console.log('vectorIsNull', value, value === null || value.length === 1 && value[0] === null)
+  return value === null || value.length === 1 && value[0] === null
+}
+
+
+export function vectorAdd(a, b) {
+  const result = []
+  const scalarB = b.length === undefined
+  for( let i=0; i<a.length; i++ )
+    result.push(a[i]+(scalarB ? b : b[i]))
+  console.log('vectorAdd', a, b, result)
+  return result
+}
+
+export function vectorSub(a, b) {
+  const result = []
+  const scalarB = b.length === undefined
+  for( let i=0; i<a.length; i++ )
+    result.push(a[i]-(scalarB ? b : b[i]))
+  console.log('vectorSub', a, b, result)
+  return result
+}
+
+export function vectorMul(a, b) {
+  const result = []
+  const scalarB = b.length === undefined
+  for( let i=0; i<a.length; i++ )
+    result.push(a[i]*(scalarB ? b : b[i]))
+  console.log('vectorMul', a, b, result)
+  return result
+}
+
+export function vectorDiv(a, b) {
+  const result = []
+  const scalarB = b.length === undefined
+  for( let i=0; i<a.length; i++ )
+    result.push(a[i]/(scalarB ? b : b[i]))
+  console.log('vectorDiv', a, b, result)
+  return result
+}