Things I learnt in javascript;

Strings

Escaping Literal Quotes in Strings

What happens when you need a literal quote: " or ' inside of your string?

// escape a quote by placing a backslash (\) in front of the quote.
const sampleStr = 'Alan said, "Peter is learning JavaScript".';
console.log(sampleStr); //Alan said, "Peter is learning JavaScript".

Concatenating Strings with the Plus Equals(+=) Operator

Concatenate a string onto the end of an existing string variable.

let ourStr = 'I come first. ';
ourStr += 'I come second.';
console.log(ourStr); //I come first. I come second.

Appending Variables to Strings

append variables to a string using the plus equals (+=) operator.

const anAdjective = 'awesome!';
let ourStr = 'Metacrafters is ';
ourStr += anAdjective;
console.log(ourStr); //Metacrafters is awesome!

The Switch Statement

Multiple Identical Options in Switch Statements

If you have multiple inputs with the same output, you can represent them in a switch statement like this:

let result = '';
switch (val) {
  case 1:
  case 2:
  case 3:
    result = '1, 2, or 3';
    break;
  case 4:
    result = '4 alone';
}

Cases for 1, 2, and 3 will all produce the same result.

Ternary Operators

Use Multiple Conditional (Ternary) Operators

You can also chain them together to check for multiple conditions.

just like if, else if, and else statements to check multiple conditions

Instead of;

function findGreaterOrEqual(a, b) {
  if (a === b) {
    return 'a and b are equal';
  } else if (a > b) {
    return 'a is greater';
  } else {
    return 'b is greater';
  }
}

do this instead

function findGreaterOrEqual(a, b) {
  return a === b
    ? 'a and b are equal'
    : a > b
    ? 'a is greater'
    : 'b is greater';
}

Functions

Returning Boolean Values from Functions

return a boolean true or false value.

instead of ;

// returns true or false
function isEqual(a, b) {
  if (a === b) {
    return true;
  } else {
    return false;
  }
}

Do this ;

// returns true or false
function isEqual(a, b) {
  return a === b;
}

Loops

Iterate Even Numbers With a For Loop

const ourArray = [];

for (let i = 0; i < 10; i += 2) {
  ourArray.push(i);
}

zenodavids/New-Javascript