Initial commit

node_modules/recharts-scale/src/util/utils.js

@@ -0,0 +1,94 @@
+const identity = (i) => i;
+
+export const PLACE_HOLDER = {
+  '@@functional/placeholder': true,
+};
+
+const isPlaceHolder = (val) => val === PLACE_HOLDER;
+
+const curry0 = (fn) => function _curried(...args) {
+  if (args.length === 0 || args.length === 1 && isPlaceHolder(args[0])) {
+    return _curried;
+  }
+
+  return fn(...args);
+};
+
+const curryN = (n, fn) => {
+  if (n === 1) {
+    return fn;
+  }
+
+  return curry0((...args) => {
+    const argsLength = args.filter((arg) => arg !== PLACE_HOLDER).length;
+
+    if (argsLength >= n) {
+      return fn(...args);
+    }
+
+    return curryN(n - argsLength, curry0((...restArgs) => {
+      const newArgs = args.map((arg) => (isPlaceHolder(arg) ? restArgs.shift() : arg));
+
+      return fn(...newArgs, ...restArgs);
+    }));
+  });
+};
+
+export const curry = (fn) => curryN(fn.length, fn);
+
+export const range = (begin, end) => {
+  const arr = [];
+
+  for (let i = begin; i < end; ++i) {
+    arr[i - begin] = i;
+  }
+
+  return arr;
+};
+
+export const map = curry((fn, arr) => {
+  if (Array.isArray(arr)) {
+    return arr.map(fn);
+  }
+
+  return Object.keys(arr).map((key) => arr[key]).map(fn);
+});
+
+export const compose = (...args) => {
+  if (!args.length) {
+    return identity;
+  }
+
+  const fns = args.reverse();
+  // first function can receive multiply arguments
+  const firstFn = fns[0];
+  const tailsFn = fns.slice(1);
+
+  return (...composeArgs) => tailsFn.reduce((res, fn) => fn(res),
+    firstFn(...composeArgs));
+};
+
+export const reverse = (arr) => {
+  if (Array.isArray(arr)) {
+    return arr.reverse();
+  }
+
+  // can be string
+  return arr.split('').reverse.join('');
+};
+
+export const memoize = (fn) => {
+  let lastArgs = null;
+  let lastResult = null;
+
+  return (...args) => {
+    if (lastArgs && args.every((val, i) => val === lastArgs[i])) {
+      return lastResult;
+    }
+
+    lastArgs = args;
+    lastResult = fn(...args);
+
+    return lastResult;
+  };
+};