How to Center Text inside an SVG Path

You are part of the way there, but you have made a few mistakes. text-anchor=”center” is wrong. It should be text-anchor=”middle”. In addition, you should add startOffset=”50%” to the <textPath> element to specify that the text should be centred on the half-way point of the path. Finally you need to fix the path itself. You …

Read more

How to determine if a linked list has a cycle using only two memory locations

I would suggest using Floyd’s Cycle-Finding Algorithm aka The Tortoise and the Hare Algorithm. It has O(n) complexity and I think it fits your requirements. Example code: function boolean hasLoop(Node startNode){ Node slowNode = Node fastNode1 = Node fastNode2 = startNode; while (slowNode && fastNode1 = fastNode2.next() && fastNode2 = fastNode1.next()){ if (slowNode == fastNode1 …

Read more

Jackson – serialization of entities with birectional relationships (avoiding cycles)

Jackson 2.0 does support full cyclic object references. See “Jackson 2.0 released” (section ‘Handle Any Object Graphs, even Cyclic ones!’) for an example. Basically, you will need to use new @JsonIdentityInfo for types that require id/idref style handling. In your case this would be both Parent and Child types (if one extends the other, just …

Read more

How to break outer cycle in Ruby?

Consider throw/catch. Normally the outside loop in the below code will run five times, but with throw you can change it to whatever you like, breaking it in the process. Consider this perfectly valid ruby code: catch (:done) do 5.times { |i| 5.times { |j| puts “#{i} #{j}” throw :done if i + j > …

Read more

Why increase pointer by two while finding loop in linked list, why not 3,4,5?

From a correctness perspective, there is no reason that you need to use the number two. Any choice of step size will work (except for one, of course). However, choosing a step of size two maximizes efficiency. To see this, let’s take a look at why Floyd’s algorithm works in the first place. The idea …

Read more