- Create a Repo on GitHub named "notSoRandom"
- Remember to initialize it with a README.md
- In command line, navigate to your “Documents” Folder:
- Clone the repo to your computer using
git clone {url}
- Clone the repo to your computer using
- Inside of this repo, create a file called “notSoRandom.js”
- Inside of this file, create the following 5 functions:
random- takes 1 number argument and console.logs a random integer between 0 and the given number (exclusively)random(10); // 4 random(100); // 78 random(2); // 0
randomLetter- takes 1 string argument and console.logs a random letter from the given stringrandomLetter("blah"); // "b" randomLetter("abcdefg"); // "g" randomLetter("z"); // "z"
myGuy- takes 1 string argument and console.logs the same string with “, my guy.” at the end of itmyGuy("Take it easy"); // "Take it easy, my guy"
string_N_times- takes 2 arguments, a string and a number, and console.logs the string as many times as the given numberhypotenuse- takes 2 number arguments (corresponding to the perpendicular sides of a right triangle) and console.logs the length of the 3rd side, the hypotenuse.- NOTE: don’t worry about the math! Here’s the equation and some links to helpful functions in JavaScript
hypotenuse(3,4); // 5
- Be sure to test to see if your functions are working as expected by calling them at the end of your script and running the
node notSoRandom.jscommand in your console. - Remember to add, commit, and push your changes!
- Look up how to set default parameter values for functions in JavaScript
- Default values allow functions to work even when the function is called without arguments
- Provide default values (choose whatever values you’d like!) for each parameter in the functions you’ve made
- At the other extreme, sometimes a function is given too many arguments. Look up the
argumentsarray for functions in JavaScript.- All arguments are pushed into a default array called
argumentsthat only exists within the scope of the function - For each of the functions we made, if the function is called with extra arguments,
throwa message informing the user “Too many arguments given!”- Note: Remember to
throwthe message BEFORE executing the rest of the code, since throws halt the rest of the code from executing - The
throwkeyword in JavaScript : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/throw
- Note: Remember to
- All arguments are pushed into a default array called
- JavaScript is considered a “weak typing” language, meaning data is not checked for being the correct TYPE of data.
- For example, in the
myGuyfunction we expect it to be called with a string argument, but what if a number is given? Try it out! This is not the intended behavior! - For each function, verify that each parameter is the correct type of data BEFORE executing the rest of the code. Throw a
TypeErrorif it isn’t.- Checking data type -
typeof - Example of throwing a
TypeError
- Checking data type -
- For example, in the
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Typescript
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Laravel
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Microsoft
Google
Alibaba
D3
Tencent