remove isArray shim

[closes #40]

src/ecdsa.js

@@ -75,7 +75,7 @@ var ECDSA = {
 
   verify: function (hash, sig, pubkey) {
     var r,s;
-    if (util.isArray(sig)) {
+    if (Array.isArray(sig)) {
       var obj = ECDSA.parseSig(sig);
       r = obj.r;
       s = obj.s;
@@ -89,7 +89,7 @@ var ECDSA = {
     var Q;
     if (pubkey instanceof ECPointFp) {
       Q = pubkey;
-    } else if (util.isArray(pubkey)) {
+    } else if (Array.isArray(pubkey)) {
       Q = ECPointFp.decodeFrom(ecparams.getCurve(), pubkey);
     } else {
       throw new Error("Invalid format for pubkey value, must be byte array or ECPointFp");

src/eckey.js

@@ -32,7 +32,7 @@ ECKey.prototype.import = function (input,compressed,version) {
     this.priv =
           input instanceof ECKey                   ? input.priv
         : input instanceof BigInteger              ? input.mod(ecparams.getN())
-        : util.isArray(input)                      ? fromBin(input.slice(0,32))
+        : Array.isArray(input)                      ? fromBin(input.slice(0,32))
         : typeof input != "string"                 ? null
         : input.length == 44                       ? fromBin(conv.base64ToBytes(input))
         : input.length == 51 && input[0] == '5'    ? fromBin(base58.checkDecode(input))
@@ -46,7 +46,7 @@ ECKey.prototype.import = function (input,compressed,version) {
           compressed !== undefined                 ? compressed
         : input instanceof ECKey                   ? input.compressed
         : input instanceof BigInteger              ? false
-        : util.isArray(input)                      ? false
+        : Array.isArray(input)                      ? false
         : typeof input != "string"                 ? null
         : input.length == 44                       ? false
         : input.length == 51 && input[0] == '5'    ? false
@@ -61,7 +61,7 @@ ECKey.prototype.import = function (input,compressed,version) {
           version !== undefined                    ? version
         : input instanceof ECKey                   ? input.version
         : input instanceof BigInteger              ? mainnet
-        : util.isArray(input)                      ? mainnet
+        : Array.isArray(input)                      ? mainnet
         : typeof input != "string"                 ? null
         : input.length == 44                       ? mainnet
         : input.length == 51 && input[0] == '5'    ? mainnet
@@ -148,7 +148,7 @@ ECPubKey.prototype.import = function(input,compressed,version) {
         : input instanceof ECKey     ? ecparams.getG().multiply(input.priv)
         : input instanceof ECPubKey  ? input.pub
         : typeof input == "string"   ? decode(conv.hexToBytes(input))
-        : util.isArray(input)        ? decode(input)
+        : Array.isArray(input)        ? decode(input)
                                      : ecparams.getG().multiply(ecdsa.getBigRandom(ecparams.getN()))
 
     this.compressed =

src/script.js

@@ -187,17 +187,17 @@ Script.prototype.toAddress = function() {
  */
 Script.prototype.getInType = function() {
     if (this.chunks.length == 1 &&
-        util.isArray(this.chunks[0])) {
+        Array.isArray(this.chunks[0])) {
         // Direct IP to IP transactions only have the signature in their scriptSig.
         // TODO: We could also check that the length of the data is correct.
         return 'Pubkey';
     } else if (this.chunks.length == 2 &&
-        util.isArray(this.chunks[0]) &&
+        Array.isArray(this.chunks[0]) &&
-        util.isArray(this.chunks[1])) {
+        Array.isArray(this.chunks[1])) {
         return 'Address';
     } else if (this.chunks[0] == Opcode.map.OP_0 &&
         this.chunks.slice(1).reduce(function(t, chunk, i) {
-            return t && util.isArray(chunk) && (chunk[0] == 48 || i == this.chunks.length - 1);
+            return t && Array.isArray(chunk) && (chunk[0] == 48 || i == this.chunks.length - 1);
         }, true)) {
         return 'Multisig';
     } else {

src/transaction.js

@@ -18,7 +18,7 @@ var Transaction = function (doc) {
     this.block = null;
     
     if (doc) {
-        if (typeof doc == "string" || util.isArray(doc)) {
+        if (typeof doc == "string" || Array.isArray(doc)) {
             doc = Transaction.deserialize(doc)
         }
         if (doc.hash) this.hash = doc.hash;
@@ -559,7 +559,7 @@ TransactionIn.prototype.clone = function () {
 var TransactionOut = function (data) {
     this.script =
         data.script instanceof Script    ? data.script.clone()
-      : util.isArray(data.script)        ? new Script(data.script)
+      : Array.isArray(data.script)        ? new Script(data.script)
       : typeof data.script == "string"   ? new Script(conv.hexToBytes(data.script))
       : data.scriptPubKey                ? Script.fromScriptSig(data.scriptPubKey)
       : data.address                     ? Script.createOutputScript(data.address)
@@ -568,7 +568,7 @@ var TransactionOut = function (data) {
     if (this.script.buffer.length > 0) this.address = this.script.toAddress();
 
     this.value = 
-        util.isArray(data.value)         ? util.bytesToNum(data.value)
+        Array.isArray(data.value)         ? util.bytesToNum(data.value)
       : "string" == typeof data.value    ? parseInt(data.value)
       : data.value instanceof BigInteger ? parseInt(data.value.toString())
       :                                    data.value;

src/util.js

@@ -1,12 +1,5 @@
 var Crypto = require('./crypto-js/crypto');
 
-/**
- * Cross-browser compatibility version of Array.isArray.
- */
-exports.isArray = Array.isArray || function(o) {
-    return Object.prototype.toString.call(o) === '[object Array]';
-}
-
 /**
  * Create a byte array representing a number with the given length
  */