The only way to truly test if a variable is undefined is to do the following. Remember, undefined is an object in Javascript. To determine if a variable or object property exists, It is good to compare to keyword undefined or you can also check the type of the object to string âundefinedâ. In the following JavaScript code we compare the num to the undefined in both way.
Nuclear waste -- The waste from nuclear power plants will be toxic for humans for more than 100,000 years. Itâs untenable now to secure and store all of the waste from the plants that exist. To scale up to 2,500 or 3,000, let alone 17,000 plants is unthinkable.
Advantages and Disadvantages of Nuclear Energy. The use of nuclear power is debatable, with some proposing it for the amount of energy produced, while some dead against it because of its potential threat to environment and human life.The advantages and disadvantages of nuclear energy provided by Buzzle will help you form an opinion about the same.Advertisement. In the simplest term, nuclear energy is defined as the energy obtained during a nuclear reaction.Nuclear reactions like fusion (when two atomic nuclei combine to form a single heavy nucleus) and fission (when a single heavy nucleus splits into two smaller nuclei) release very high amounts of energy.he advantages and disadvantages of nuclear energy provided by Buzzle will help you form an opinion about the same. Advertisement. In the simplest term, nuclear energy is defined as the energy obtained during a nuclear reaction.