first commit

node_modules/d3-scale/src/pow.js

@@ -0,0 +1,50 @@
+import {linearish} from "./linear.js";
+import {copy, identity, transformer} from "./continuous.js";
+import {initRange} from "./init.js";
+
+function transformPow(exponent) {
+  return function(x) {
+    return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
+  };
+}
+
+function transformSqrt(x) {
+  return x < 0 ? -Math.sqrt(-x) : Math.sqrt(x);
+}
+
+function transformSquare(x) {
+  return x < 0 ? -x * x : x * x;
+}
+
+export function powish(transform) {
+  var scale = transform(identity, identity),
+      exponent = 1;
+
+  function rescale() {
+    return exponent === 1 ? transform(identity, identity)
+        : exponent === 0.5 ? transform(transformSqrt, transformSquare)
+        : transform(transformPow(exponent), transformPow(1 / exponent));
+  }
+
+  scale.exponent = function(_) {
+    return arguments.length ? (exponent = +_, rescale()) : exponent;
+  };
+
+  return linearish(scale);
+}
+
+export default function pow() {
+  var scale = powish(transformer());
+
+  scale.copy = function() {
+    return copy(scale, pow()).exponent(scale.exponent());
+  };
+
+  initRange.apply(scale, arguments);
+
+  return scale;
+}
+
+export function sqrt() {
+  return pow.apply(null, arguments).exponent(0.5);
+}