circular waveguide

The circular references caused by the mutual reference between block and self are understood by everyone. On the following code (intercept section)__weak typeof (self) weakself = self;Self.jsbridgefunctiondic = @{Jsbridgecallnativepage:^ (Nsdictionary *data) {NSLog (@ "Jsbridgecallnativepage");Nsdictionary *params = [Data dictionaryforkey:@ "params"];if (params) {NSString *url = [params stringforkey:@ "url"];if (Url.length > 0) {Open a new page}else {

Circular chain list Solution Joseph Ring problem#include using namespacestd;structnode{intdata; Node*next;}; Node*joseph (Node *head,intMintk);//Create a circular linked list (unidirectional)Node *cycle_list (intNintMintk) {Node*head=Newnode; Node*p=Head; //node *temp;Node *temp; for(intI=0; i) {Temp=Newnode; Temp->data=i+1; P->next=temp; P=temp; } head=head->Next; P->next=Head; while(head->next!=head) {H

[HTML] view Plaincopyprint? __weaktypeof (self) weakself = self ;NBSP;NBSP; dispatch_after (Dispatch_time (dispatch_time_now, (int64_t) (2*nsec_per_sec)), dispatch_get_main_queue (), ^{ NBSP;NBSP; __strongtypeof (weakself) strongself = weakself ;NBSP;NBSP; [strongselfdosomething]; }); Weakself is for the block to not hold self, avoid circular references, and then declare a strongself because once you

This article is based on cocos2d-x2.2.3, not written in the version after 3.0, simply provides a way to use this feature point in the future, and does not give a detailed account of the basic knowledge of box2d physics engine, please refer to other technical documents by yourself.Using the box2d physics engine, we usually need to give ourselves a boundary to limit the body's range of activity, most commonly using four edges around the edge of the screen to form a rectangle. But what if our needs

I will give you a detailed analysis of the Illustrator software to share with you the tutorial on creating circular icons for designing tree planting.Tutorial sharing:In the Ai software, create a 800*800 document, select the elliptical tool, hold down shift to draw two positive circles, and fill the color, as shown in the figure.Then, select the pen tool and draw out the following path, select the path and circle to window-Path Finder-click to split,

In IntroductionConstructor Injection,Property InjectionAndMethod call InjectionIt is particularly mentioned that circular references (Circular references) should not appear, because it is difficult to detect such problems. The best solution is to writeCodeAvoid this situation whenever possible. Let's take a look at several scenarios of circular references. We s

distance and the width of the coordinates of the center point on the x and y directions can be processed. That is, the absolute value of the distance between the two rectangular centers in the x direction is less than or equal to 1/2 of the width and 1/2 of the rectangle, and the absolute value of the distance in the y direction is less than or equal to of the rectangle height and. The following is a mathematical expression: X direction: | (x1 + w1/2)-(x2 + w2/2) | Y direction: | (y1 + h1/2)-(

Android custom View (6) ------ high imitation Huawei honor 3C circular scale diagram (ShowPercentView), android high imitationWhy write this article: Display the proportion of the current capacity to show the progress of the current plan. The percentage is usually used, and the graphic display, with its clear intuition and pleasing appearance, it is our first choice. In the percentage representation method, we can use the

CF #52 C Circular RMQ (segment tree Interval Update ), Description You are given circular arrayA0, average,A1, middle..., middle ,...,ANLimits-limits 1. There are two types of operations with it: Inc(Lf, Bytes,Rg, Bytes,V)-This operation increases each element on the segment [Lf, Bytes,Rg] (Inclusively)V; Rmq(Lf, Bytes,Rg)-This operation returns minimal value on the segment [Lf, Bytes,Rg] (Inclusively ).

Ios: how to display an image as a circular style/set the widget border size and color For example, the QQ login avatar shows a circle, but in fact its image is not a circle, but drawn by the layer. When it comes to layer, each control has a layer attribute, so any control can be set to a circle, or an elliptical control depends on the project's needs. UIImageView * imageView = [[UIImageView alloc] initWithImage: [UIImage imageNamed: @ "header .png"];