However, the use of callbacks can lead to a maintainability issue known as callback hell. We will now write a real-life example to showcase what a callback hell is and how easily we can end up dealing with it.

Taiwan says Chinese warplanes entered its airspace in the South China Sea on Wednesday and Thursday during large-scale war games that it called a “serious provocation to the self-governing island and a grave threat to regional peace and stability.” Taiwan’s foreign ministry said Thursday that its military was fully aware of China’s actions and “responds effectively,” without giving details. The war games reportedly took place in airspace between Taiwan’s main island and the Taiwan-controlled Pratas island group to the south.

It is likely that the long evolutionary trajectory of Mycoplasma went from a reductive autotroph to oxidative heterotroph to a cell-wall–defective degenerate parasite. This evolutionary trajectory assumes the simplicity to complexity route of biogenesis, a point of view that is not universally accepted.

Survivor bias commonly weakens observational studies, even those published in premier journals. It occurs because patients who live longer are more likely to receive treatment than those who die early.