call

A professor of mine once said that the following code should never be done: System.out.println(object.toString()); He said (and I believe cited "Effective Java") it causes a double call. Since the print statement calls the toString method of an object, it would be less efficient to have the toString method called twice. The preferred method would be to just use: System.out.println(object); Obviously this way looks better in code and would save time. I will always do it like this no matter what, but my question is "Is this actually more EFFICIENT?". In looking through the PrintStream

I would like a local notification to be fired when a call is received (and to show an alert) - is this possible? Can a call event get an app to launch or a notification to be fired? How is skype fired? With push notifications? Thanks If your application is running while a call is in place check out the CoreTelephony Framework . The CTCall class provides information about the call state. I have not used this myself but you may find it useful. extern NSString const *CTCallStateDialing; extern NSString const *CTCallStateIncoming; extern NSString const *CTCallStateConnected; extern NSString const

I'm a big fan of using the forEach method on nodeLists like this: var nodes = document.querySelectorAll(".foo"); [].forEach.call(nodes, function (item) { //do stuff with item }); I was wondering though, does doing it that way take longer than the regular way? e.g. for(var i=0;i<nodes.length;i++){ //do stuff with nodes[i]; } Here's a nice performance comparison . According to it Array.forEach is slower than a native for loop. I know it's an old post but using the forEach method can be done by stealing the Array prototype as well. NodeList.prototype.forEach = Array.prototype.forEach; It depends

I am trying to figure out how file1.bat can call file2.bat at a specified label. I figured I can do it like this: File1.bat :config @echo off :setvars set labelmarker=labelmarker call file2.bat pause > nul :EOF File2.bat if %labelmarker%==labelmarker goto label4 :label1 echo it won't work... goto EOF :label2 echo it must work! goto EOF :label3 echo it didn't work... goto EOF :label4 echo it works! goto EOF :EOF This works. but I want to call a bat AND the Label from file1.bat. is it possible with a control character or ascii code or anything? like i tried call file2.bat | goto label4 - doesn't

I am trying to use the call_command method to call the dumpdata command . Manually, I use it as follows to save the data to a file. python manage.py dumpdata appname_one appname_two > /path/to/save/file.json and it saves the json file. Now, I am in a situation where I need to call this command using the call_command method. I am able to print out the json from the command using the following: from django.core.management import call_command call_command('dumpdata', 'appname_one', 'appname_two') Is there a way I can save the given data to a file like we do it from the command line? had to

How can i call a private function from some other function within the same class? class Foo: def __bar(arg): #do something def baz(self, arg): #want to call __bar Right now, when i do this: __bar(val) from baz(), i get this: NameError: global name '_Foo__createCodeBehind' is not defined Can someone tell me what the reason of the error is? Also, how can i call a private function from another private function? There is no implicit this-> in Python like you have in C/C++ etc. You have to call it on self . class Foo: def __bar(self, arg): #do something def baz(self, arg): self.__bar(arg) These