Eloquent Ruby

Chapter 19. Save Blocks to Execute Later

It’s hard to believe, but we are not done with code blocks yet. There is still one more bit of software goodness that we can squeeze out of the programming construct that keeps on giving. Two chapters ago we called on code blocks as iterators to sequence through collections. In the last chapter we looked to the block as a mechanism for delivering the right code to the right context. The topic of this chapter is similar to the last: using blocks as a device for delivering your code where it is needed. The difference is that, while the execute around technique was all about getting your code to the right place, this chapter will focus on using blocks to transport your code through time. In the pages that ...