Opposite of push();

Well, you've kind of asked two questions. The opposite of push() (as the question is titled) is pop().

var exampleArray = ['myName'];
exampleArray.push('hi');
console.log(exampleArray);

exampleArray.pop();
console.log(exampleArray);

pop() will remove the last element from exampleArray and return that element ("hi") but it will not delete the string "myName" from the array because "myName" is not the last element.

What you need is shift() or splice():

var exampleArray = ['myName'];
exampleArray.push('hi');
console.log(exampleArray);

exampleArray.shift();
console.log(exampleArray);

var exampleArray = ['myName'];
exampleArray.push('hi');
console.log(exampleArray);

exampleArray.splice(0, 1);
console.log(exampleArray);

For more array methods, see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array#Mutator_methods

push() adds at end; pop() deletes from end.

unshift() adds to front; shift() deletes from front.

splice() can do whatever it wants, wherever it wants.