Why do you have to wrap parenthesis around a number to called toFixed on it?

quiz: mad libs (2-11)
twig convert string to integer
twig number format thousands separator
twig number format leading zeros
unknown "format_currency" filter.
twig float to int

For example,

1.toFixed(2) // Uncaught SyntaxError: Invalid or unexpected token

(1).toFixed(2) // "1.00"

let num = 1
num.toFixed(2) // "1.00"

At the same time, you don't have to wrap parenthesis around strings to call methods on them

'yo'.repeat(3) // "yoyoyo"

What is the rule at play here and where else does it apply? Guessing it has something to do with the dot being misinterpreted as a decimal for numbers?

Because the interpreter is looking for more digits (decimal values), not keywords or methods.

JavaScript for PHP Developers: A Concise Guide to Mastering JavaScript, As with String(), new Number() creates number objects, while Number() toFixed(2); (1000000000000).toExponential(); (1000000000000).toPrecision(3); As you can see, methods of the primitive numbers can be called as if they were objects. Wrap them in parentheses (grouping operator) when you need to work with  Definition of Amounts in Parentheses Parentheses around a number could have a variety of meanings. For example, parentheses could indicate any of the following: A negative amount, such as a negative balance in your check register A credit balance in an account that normally has a debit balance, o

As others have stated, JavaScript is looking for more numbers after the decimal point. It thinks you are trying to type a float like 1.2 and it doesn't like that t there, it's not a number.

Interestingly, you can do this without parenthesis or making variable by using 2 decimal points. Like this: 1..toFixed(2). I guess you can also do 1.0.toFixed(2) if you want.

UDACITY quiz help, hi guys I am stucked in a udacity quiz,and no one helps me around their forum. Quiz: Out to Dinner (2-10) Create a variable called bill and assign it the result To use toFixed() pass it the number of decimal points you want to use. You don'​t have to recompute the sum in the tip; you can just use the value  I get the whole redundancy thing. People make mistakes, it came from a time when people hand-wrote everything, etc. Why have 1 bridge across a river if you can have 2? But you have to draw the line somewhere. Don’t succumb to RAS syndrome (redundant acronym syndrome syndrome). Let me go to the ATM machine and give you my PIN number.

Scripting in Java: Integrating with Groovy and JavaScript, You can call all methods of the Number object on all primitive numbers. However, you The parser gets confused in the following statement: var x = 1969.toString(​16); // A Enclose the number inside a pair of parenthesis such as • (1969). toString(16) is " + n2); var n3 = (1969.79).toFixed(1); print("(1969.79).toFixed(1)  I guess if you had to alter both the word and the numeral, it would be harder than if you had to alter just one or the other. That’s why you sometimes see a numeral in parentheses after a number that is written out —it is a relic of legal writing, but it’s not something you need to include in your writing today.

The JavaScript Workshop: A New, Interactive Approach to Learning , Using a combination of the Number functions and methods, it is possible to convert to and toExponential(3) ); // outputs "1.235e+2" However, calling those functions on integer literals toExponential(2) ); // Wrap within parentheses (. runtime's ability to calculate provides you with a means to reduce bugs in your code. 10 Responses to “15 Purposes for Parentheses” Nick on May 04, 2011 8:27 am. As a writer, I find parentheses most useful for drafts/editing. When I’m working on a draft and I get stuck, need to look something up, or really don’t like a particular sentence or paragraph, I’ll use parentheses to take a quick note, such as (insert car ride scene here), or (what is the acceleration of a

javascript-intro-to-functions/README.md at master · learn-co , You're already very familiar with the idea of wrapping our code as methods in Ruby in The name of the function is always followed by () and then curly braces that begin However, JavaScript has no implicit-return-value concept, so you must write If you try to call on a function using just its name, as you can in Ruby, the  Parentheses. Parentheses (always used in pairs) allow a writer to provide additional information. The parenthetical material might be a single word, a fragment, or multiple complete sentences. Whatever the material inside the parentheses, it must not be grammatically integral to the surrounding sentence. If it is, the sentence must be recast.

4. Working with Words, Numbers, and Dates, As you read in the last chapter, you can use data to make decisions in a named data that stores an array, then store a number in the variable, you've One set of parentheses (labeled 1) wraps around two other parenthetical groups (2 and 3). Fortunately, there's a method for numbers called toFixed(), which lets you  It thinks you are trying to type a float like 1.2 and it doesn't like that t there, it's not a number. Interestingly, you can do this without parenthesis or making variable by using 2 decimal points. Like this: 1..toFixed(2). I guess you can also do 1.0.toFixed(2) if you want.

Comments
  • An number looks like some digits optionally followed by . and more digits. That's what the parser assumes the . means here. It's not being misinterpreted; the token syntax for numbers takes precedence over the language grammar.
  • Try 1..toFixed(2) :-)
  • @RocketHazmat Nice trick. thanks!