stanford courses

exposed to nsnotification before, as shown in the example above, receiving this nsnotification in the message center, The nsnotification is then captured in the method thekeyboardappeared of the selector and then extracted from the information in the UserInfo for related processing.Here are some of the other properties of Uitextfield, very interestingFor example, you can set the font size to fit the width of the text box when the text input is many, but the font cannot be reduced indefinitely,

We have a info.plist file in our project, we have been in touch with this file since we did the localization setup, there are many settings.You can even view it in XML format, but usually you edit this file by clicking on the project name at the top of the engineering catalog:You have a lot of features in your app that you can't use until you set them up to enable, and the switch is interesting to indicate whether it's available via a switch, such as when we used the Mapkit to do the map functio

Judgment statement if imageData! = nil{ self.image = UIImage (data:imagedata!) } else { self . Image = Nil}}}}} Note that when calling spinner it is optional, because the page may be generated before the spinner control, which is a common approach when invoking the control. However, this method is loaded with different processing situations, in common with the image, so we choose to stop the gears in the set method that calculates the attribute image:Private var i

, the white split line means that it can be accessed directly, and the yellow split line means that it cannot be accessed directly.We now want to access the properties in a view uiview, we need to use outlet for direct access, if there are certain events in the view (such as click, Swipe) to notify the controller (controllers) need to be accessed by action or delegate way, The model data changes are broadcast to notify the controller.Third, the first objective-c focus and points of attentionWe c

Recently started to learn Swift to develop mobile programs. Follow Stanford's Open class for self-study.This is a wonderful time, although not at Stanford School, but can watch the recorded video, lectures, as if the teacher is giving us a lesson!Experience:1, each lesson information is very large, each word, each operation is intentional and for it. Need to have a good experience after class, according to the knowledge points in the class to practice

image? We have a uiimageview that shows pictures, but you may want to throw your pictures into the drawrect.In general you will create a picture with a name in order to get it out of the images.xcassets.Once you have this picture, you can send a message to show it, this method is Drawatpoint, then the system will put the normal size of the picture in the upper left corner of the point.You can also use the Drawinrect method, which will scale the image in this rectangular area.Or, as we said befo

{ faceview.datasource = self } }The other thing to do is to let Faceview redraw itself every time our model changes. We need to complete UpdateUI this method:Func UpdateUI () { faceview.setneedsdisplay () }The meaning here is to call my drawrect function and redraw me. If you do not do this step then modify the value of the happiness the face of the little man will not change. Let's change the value of happiness to 75 to run a look at the effect:A very cute smiley face. "W

two constraints, a horizontal center, and a bottom distance:We create a third button in the same way:Let's Run our program:You can see that the top text is cut off and rotated:It looks good in the horizontal screen mode, but the vertical screen is not going to work. Since we have set the font size to 36th, you can see it in the autoshrink of the storyboard property monitor, the current setting is fixedFont size (fixed font size):But this font does not need a fixed size, I need to set its minimu

Stanford iOS Learn Notes, stanfordios During this time, I was studying Stanford's iOS 8 teaching video, so I was not thinking about it, so I was prepared to summarize some notes about the video learning so that I could understand it more easily. Now I have learned six lessons. From these six lessons, the first three lessons mainly focus on a Demo of Calculator and interspersed with a few iOS introductions, and MVC introduction. Section 4 mainly intr

) Methodtoinvokeifsomethinghappensname: (NSString*) name//Name of station (a constant somewhere)Object:(ID) sender;//whose changes you ' re instertsted in (Nil is anyone ' s)//you 'll then being notified when there is broadcasts-(void) Methodtoinvokeifsomethinghappens: (Nsnotification *) notification{Notification.name//The name passed aboveNotification.Object //The object sending you the notificationNotification.userinfo//notification-specific Information about what happened} 10.Be sure to ' tun

it via the Uitableviewcontroller @property (strong) Uirefreshcontrol *refreshcontrol; Start it with...-(void) beginrefreshing;Stop it with...-(void) endrefreshing; 11.What If your Model changes?-(void) reloaddata;Causes the table view to call Numberofsectionsintableview:and Numberofrowsinsection:all over again and then Cellforrowat Indexpath:on each visible cell. Relatively heavyweight,but if your entire data structure Changes,that ' s what you need. If only part of your Model Changes,there is

two classification problem, so the model is modeled as Bernoulli distributionIn the case of a given Y, naive Bayes assumes that each word appears to be independent of each other, and that each word appears to be a two classification problem, that is, it is also modeled as a Bernoulli distribution.In the GDA model, it is assumed that we are still dealing with a two classification problem, and that the models are still modeled as Bernoulli distributions.In the case of a given y, the value of x is

)) { Cgpoint translation = [gesture translationinview:self.faceview];//conversion to point displacement changes in the coordinate system self.happiness-= TRANSLATION.Y/2; In addition to the effect of 2. Decrease the amplitude of the change [gesture Settranslation:cgpointzero inview:self.faceview];//0 to make the range of changes not additive }}Next, implement the functions defined in the Protocol,-(float) Smileforfaceview: (Faceview *) sender{ return (self.happiness

. The data source does not deal with such things as would and should, he answers how many songs there are and returns the quantity to the view. The view now opens up space for these 10,000 songs. So the function of the controller (C) is to interpret and format the data provided by these models (M) for the View (V).So the question comes again, can the model communicate with the controller? Obviously not. But suppose the data changes how to notify our controllers? It still uses this method of blin

default is to use a hidden layer is a reasonable choice, but if you want to choose the most appropriate layer of hidden layer, you can also try to split the data into training sets, validation sets and test sets, and then try to use a hidden layer of neural network to train the model. Then try two, three hidden layers, and so on. Then see which neural network behaves best on the cross-validation set. That means you get three neural network models, one, two, and three hidden layers, respectively

are as follows:Lambda Train error Validation error 0.000000 0.173616 22.066602 0.001000 0.156653 18.597638 0.003000 0.190298 19.981503 0.010000 0.221975 16.969087 0.030000 0.281852 12.829003 0.100000 0.459318 7.587013 0.300000 0.921760 1.000000 2.076188 4.260625 3.000000 4.901351 3.822907 10.000000 16.092213 9.945508 Training errors, cross-validation errors, and relationships between lambda graphs are represented as follows:When th

unreasonable. That is, in the past two months the word has not appeared in the mail, it is considered that the probability of 0, unreasonable.Generally speaking, it is unreasonable to think that these events will not happen if they have not been seen before . Solve this problem with Laplace smoothing.4. Laplace SmoothingAccording to the maximum likelihood estimate, p (y=1) = # "1" s/(# "0" s + # "1" s), that is, the probability of Y being 1 is the ratio of the number of 1 in the sample to all s

Model,view no model-oriented broadcasts, and the view and controller will broadcast to each other.The model broadcast is very useful because it is not visible, but there are restrictions that can only notify the object that is allowed to notify what happened.(7) 1 model only 1 controllers.Can a controller have a view conversation with someone else? Normally the controller will have a pointer pointing to another controller as the view, which will require the controller to display the object. So,

Question link: http://poj.org/problem? Id = 2239 DescriptionIt is well known that it is not easy to select courses in the college, for there is usually conflict among the Time of the courses. li Ming is a student who loves study every much, and at the beginning of each term, he always wants to select courses as more as possible. of course there shocould be no c

(It.hasnext ()){Course cr= (Course) it.next ();System.out.println ("Course: +cr.id+": "+cr.name");}}/** Access the collection elements with the For each method*/public void Testforeach (){for (Object Obj:coursetoselect){Course cr= (Course) obj;System.out.println ("Course: +cr.id+": "+cr.name");}}public static void Main (string[] args){Listtest it=new listtest ();It.testadd ();It.testget ();It.testiterator ();It.testforeach ();}Course changespublic void Testmodify (){Coursetoselect.set (4, New C