rm push/pop

tween.cm

@@ -8,7 +8,7 @@ function make_engine(default_clock) {
     tweens: [],
     default_clock: default_clock || null,
     add(tween) {
-      push(this.tweens, tween)
+      this.tweens[] = tween
     },
     remove(tween) {
       this.tweens = filter(this.tweens, t => t != tween)
@@ -164,7 +164,7 @@ var TimelineProto = {
   engine: null,
 
   add_event: function(time_value, fn) {
-    push(this.events, { time: time_value, fn, fired: false })
+    this.events[] = { time: time_value, fn, fired: false }
   },
 
   add_tween: function(obj, props, duration, start_time) {
@@ -257,13 +257,13 @@ $delay(() => {
 function snapshot() {
   var result = []
   arrfor(TweenEngine.tweens, function(tw) {
-    push(result, {
+    result[] = {
       startVals: tw.startVals,
       endVals: tw.endVals,
       duration: tw.duration,
       startTime: tw.startTime,
       easing: tw.easing ? (tw.easing.name || 'unknown') : 'none'
-    })
+    }
   })
   return {active_count: length(TweenEngine.tweens), tweens: result}
 }