website/libs/handlebars.dev.js
function(key) {
				var value = this.popStack(),
					context,
					type;

				if (this.options.stringParams) {
					type = this.popStack();
					context = this.popStack();
				}

				var hash = this.hash;
				if (context) {
					hash.contexts.push("'" + key + "': " + context);
				}
				if (type) {
					hash.types.push("'" + key + "': " + type);
				}
				hash.values.push("'" + key + "': (" + value + ")");
			}
function(key) {
				var value = this.popStack(),
					context,
					type;

				if (this.options.stringParams) {
					type = this.popStack();
					context = this.popStack();
				}

				var hash = this.hash;
				if (context) {
					hash.contexts.push("'" + key + "': " + context);
				}
				if (type) {
					hash.types.push("'" + key + "': " + type);
				}
				hash.values.push("'" + key + "': (" + value + ")");
			}
function ( key ) { var value = this . popStack ( ) , context , type ; if ( this . options . stringParams ) { type = this . popStack ( ) ; context = this . popStack ( ) ; } var hash = this . hash ; if ( context ) { hash . contexts . push ( "'" + key + "': " + context ) ; } if ( type ) { hash . types . push ( "'" + key + "': " + type ) ; } hash . values . push ( "'" + key + "': (" + value + ")" ) ; }
[assignToHash]  On stack, before: value, hash, ... On stack, after: hash, ...  Pops a value and hash off the stack, assigns `hash[key] = value` and pushes the hash back onto the stack.
[ assignToHash ] On stack before : value hash ... On stack after : hash ... Pops a value and hash off the stack assigns hash [ key ] = value and pushes the hash back onto the stack .