Not Equal: Every domino half in this space must have a completely different number of pips.
[2] K. Lemström & P. Fränti: “N-Candidate methods for location invariant dithering of color images” (2000). ↑
，详情可参考同城约会
Under the new API design, transforms should not perform any work until the data is being consumed. This is a fundamental principle.
Google 的 AppFunctions 也是同理。
for t := range c {