... Good answer, but I take small issue with you saying: “you can't refer to self or properties on self from within a block that will be strongly retained by self.” This is not strictly true. Please see my answer below. Better to say, “you must take...

My registration form, which is a form for the Users model, takes a string value for company. However, I have just made a change such that users belongs_to companies. Therefore, I need to pass an object of Company to the Users model. ...

...ults from stdin, does work, writes intermediate results on stdout. Connect all the workers as a pipeline: process1 <source | process2 | process3 | ... | processn >result Each process reads, does work and writes. This is remarkably efficient since all processes are running concurrently. T...

...yout, mKLayout; private boolean isEdit = false, isEdit1 = false; private String mUpper = "upper", mLower = "lower"; private int w, mWindowWidth; private String sL[] = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "...

...ebase. I do not use squash (to flatten commits), but I rebase to avoid the extra merge commits. As your Git knowledge increases you find yourself looking a lot more at history than with any other version control systems I've used. If you have a ton of small merge commits, it's easy to lose focus o...

... Scala treats all of its different tuple sizes as different classes (Tuple1, Tuple2, Tuple3, Tuple4,...,Tuple22) while they do all inherit from the Product trait, that trait doesn't carry enough information to actually use the data values ...

... What's the difference? SomeBaseClass.__init__(self) means to call SomeBaseClass's __init__. while super(Child, self).__init__() means to call a bound __init__ from the parent class that follows Child in the instance's Method Resolution Order (MRO). If the instance is a subclass of ...

... A Date object's underlying value is actually in UTC. To prove this, notice that if you type new Date(0) you'll see something like: Wed Dec 31 1969 16:00:00 GMT-0800 (PST). 0 is treated as 0 in GMT, but .toString() method shows the local time. Big note, UTC stands ...

...可能会报目录不存在的错误，无视 [root@redhat ~]#yum clean all [root@redhat ~]#yum makecache 检查一下成功没有 [root@redhat mnt]# yum grouplist 6、安装支持包 [root@redhat yum.repos.d]# cd /mnt/ [root@redhat mnt]# cat pacakage.txt [root@redhat mnt]# yum install $(...

...heuristic like in Git, there is nothing in the model that precludes adding extra information to a snapshot, e.g., rename information. We do that in Mercurial. – Martin Geisler Jan 26 '11 at 9:05 ...