A prototype usually focuses on the main feature of the program. For example, if you're creating a personal organizer program, your prototype may be the calendar and event-adding function. Your prototype should be able to be used as its own program. It will be the foundation of everything else, so make sure its working properly. As you iterate on the feature, continue to refine it until it works smoothly and efficiently. The prototype allows you to make rapid changes and then test them out. Have others test your prototype to ensure that it functions properly. Expect the prototype to change as you work on it. The whole point of the prototype is to experiment before committing. The prototype allows you to see if the features you want are possible before you dive into coding the program proper. If the prototype is doomed to fail, scrap it and return to the drawing board. It will save you a lot of headache down the line
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One-sentence summary -- Focus on one feature. Iterate until the feature works. Don't be afraid to scrap the prototype.

Q: In some cases, you may be provided with a function or formula that predicts or assigns the position of an object with respect to time. In other cases, you may derive the function from repeated experiments or observations. For this article, we assume that the function has been provided or previously calculated. For the example illustrated above, studies have led to the function (t)=2t3{\displaystyle heta (t)=2t^{3}}, where (t){\displaystyle heta (t)} is the angular measure of the position of the rotation at a given time, and t{\displaystyle t} represents the time. Velocity is the measure of how fast an object changes its position. In layman's terms, we think of this as its speed. In mathematical terms, the change of position over time can be found by finding the derivative of the position function. The symbol for angular velocity is {\displaystyle \omega }. Angular velocity is generally measured in units of radians divided by time (radians per minute, radians per second, etc.). In this example, find the first derivative of the position function (t)=2t3{\displaystyle heta (t)=2t^{3}}: (t)=ddt=6t2{\displaystyle \omega (t)={
rac {d heta }{dt}}=6t^{2}} If desired, this function could be used to calculate the angular velocity of the spinning object at any desired time t{\displaystyle t}. For this particular calculation, the angular velocity function is just an intermediate step toward finding angular acceleration. Acceleration is the measure of how fast an object's velocity is changing over time. You can mathematically calculate the angular acceleration by finding the derivative of the function for angular velocity. Angular acceleration is generally symbolized with {\displaystyle lpha }, the Greek letter alpha. Angular acceleration is reported in units of velocity per time, or generally radians divided by time squared (radians per second squared, radians per minute squared, etc.). In the previous step, you used the function for position to find the angular velocity (t)=6t2{\displaystyle \omega (t)=6t^{2}}. Now find the acceleration function as the derivative of {\displaystyle \omega }: =ddt=12t{\displaystyle lpha ={
rac {d\omega }{dt}}=12t}. Once you have derived the function for instantaneous acceleration as the derivative of velocity, which in turn is the derivative of position, you are ready to calculate the instantaneous angular acceleration of the object at any chosen time. For the sample problem in the illustration, suppose you know that the function for the position of the spinning object is (t)=2t3{\displaystyle heta (t)=2t^{3}}, and you are asked for the object's angular acceleration after it has been spinning for 6.5 seconds. Use the derived formula for {\displaystyle lpha } and insert the information as follows: =ddt=12t{\displaystyle lpha ={
rac {d\omega }{dt}}=12t} =(12)(6.5){\displaystyle lpha =(12)(6.5)} =78.0{\displaystyle lpha =78.0} Your result should be reported in units of radians per second squared. Thus, the angular acceleration for this spinning object when it has been spinning for 6.5 seconds is 78.0 radians per second squared.
A: Determine the function for angular position. Find the function for angular velocity. Find the function for angular acceleration. Apply the data to find instantaneous acceleration.

Article: In all relationships, communication is key. Many fights and misunderstandings stem from a lack of communication. Going forward, it's important to be 100% honest about your actions and feelings in your friendship. If an issue arises in the future, make it clear that you'd like to resolve those issues by talking with each other instead of talking to other people or doing something that either of you may regret. Bring issues up immediately instead of bottling up your feelings. When we suppress feelings and emotions, we are more likely to boil over and say or do something we regret. If a problem arises, address it right away. It is important to know what you and your friend expect out of a friendship in order for it to work. For example, you may deal with situations differently, or some things may bother you more than others. This is why you must establish expectations. Tell your friend what you need from them in a friendship. Being honest will help your friend to better meet your needs. Explain to your friend what you need from them using the "I-message" formula: "I feel _____ when you _______ and I need for you to _______." Refrain from assigning blame to your friend, though. Ask your friend what they need from you in a friendship. Again, friendship is a two-way street. Therefore, you need to meet your friends needs as well. Ask them to be honest about how you can be a better friend to them. Be ready to meet both needs. Resolution begins when you start understanding each other and the situation. As you hear similar needs from each other, the differences are put aside and you are able to work things through. It's impossible to move forward if you are unable to forgive. Holding onto anger or grudges isn't healthy for you and will ruin any chance you have of a real friendship. It takes a lot of strength to forgive, but it will help you grow as a person and as a friend. Tell your friend that you forgive them it is an important factor in rebuilding trust for both of you. It will mean a lot to your friend to hear that you forgive them, and saying "I forgive you" will help you move on from the situation. If you cannot forgive this person for their actions, you cannot be friends with him or her. Trying to have a relationship with someone you hold anger towards isn't healthy for you or for them. Life is too short to hold grudges.
Question: What is a summary of what this article is about?
Improve communication with your friend. Establish expectations for your friendship. Be willing to forgive.