first commit

app_vue/node_modules/hash-sum/hash-sum.js

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+'use strict';
+
+function pad (hash, len) {
+  while (hash.length < len) {
+    hash = '0' + hash;
+  }
+  return hash;
+}
+
+function fold (hash, text) {
+  var i;
+  var chr;
+  var len;
+  if (text.length === 0) {
+    return hash;
+  }
+  for (i = 0, len = text.length; i < len; i++) {
+    chr = text.charCodeAt(i);
+    hash = ((hash << 5) - hash) + chr;
+    hash |= 0;
+  }
+  return hash < 0 ? hash * -2 : hash;
+}
+
+function foldObject (hash, o, seen) {
+  return Object.keys(o).sort().reduce(foldKey, hash);
+  function foldKey (hash, key) {
+    return foldValue(hash, o[key], key, seen);
+  }
+}
+
+function foldValue (input, value, key, seen) {
+  var hash = fold(fold(fold(input, key), toString(value)), typeof value);
+  if (value === null) {
+    return fold(hash, 'null');
+  }
+  if (value === undefined) {
+    return fold(hash, 'undefined');
+  }
+  if (typeof value === 'object' || typeof value === 'function') {
+    if (seen.indexOf(value) !== -1) {
+      return fold(hash, '[Circular]' + key);
+    }
+    seen.push(value);
+
+    var objHash = foldObject(hash, value, seen)
+
+    if (!('valueOf' in value) || typeof value.valueOf !== 'function') {
+      return objHash;
+    }
+
+    try {
+      return fold(objHash, String(value.valueOf()))
+    } catch (err) {
+      return fold(objHash, '[valueOf exception]' + (err.stack || err.message))
+    }
+  }
+  return fold(hash, value.toString());
+}
+
+function toString (o) {
+  return Object.prototype.toString.call(o);
+}
+
+function sum (o) {
+  return pad(foldValue(0, o, '', []).toString(16), 8);
+}
+
+module.exports = sum;