From ed976c214b3dec9692231aa0fe2ace1b1ed17527 Mon Sep 17 00:00:00 2001
From: drbaggy <js5@sanger.ac.uk>
Date: Sat, 24 Jul 2021 23:48:22 +0100
Subject: ch-1 in php

---
 challenge-122/james-smith/php/ch-1.php | 40 ++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 challenge-122/james-smith/php/ch-1.php

(limited to 'challenge-122/james-smith/php/ch-1.php')

diff --git a/challenge-122/james-smith/php/ch-1.php b/challenge-122/james-smith/php/ch-1.php
new file mode 100644
index 0000000000..2825161761
--- /dev/null
+++ b/challenge-122/james-smith/php/ch-1.php
@@ -0,0 +1,40 @@
+<?php
+
+class Stream {
+  private $stream;
+  function __construct() {
+    $this->stream = [];
+  }
+  function add( $var ) {
+    if(is_array($var)) {
+      foreach( $var as $v ) {
+        $this->stream[] = $v;
+      }
+    } else {
+      $this->stream[] = $var;
+    }
+  }
+  function get() {
+    if(sizeof($this->stream)>0) {
+      return array_shift($this->stream);
+    }
+    throw new Exception('Empty stream');
+  }
+}
+
+function stream_average($stream) {
+  static $n = 0, $t = 0;
+  return ($t+=$stream->get())/++$n;
+}
+
+$s = new Stream();
+
+$s->add( array_map( function($x) { return $x*10;}, range(1,50) ) );
+
+while(1) {
+  try {
+    echo stream_average($s),"\n";
+  } catch(Exception $e) {
+    break;
+  }
+}
-- 
cgit