javascript Programming Glossary: tonumber

http://stackoverflow.com/questions/2485632/valueof-vs-tostring-in-javascript

is string return concat pa ToString b else return add pa ToNumber b and this is what actually happens a b pa ToPrimitive a pb.. return concat ToString pa ToString pb else return add ToNumber pa ToNumber pb That is toString is applied to the result of.. concat ToString pa ToString pb else return add ToNumber pa ToNumber pb That is toString is applied to the result of valueOf not..

Why an empty Array type-converts to zero? +[]

http://stackoverflow.com/questions/3306453/why-an-empty-array-type-converts-to-zero

Number constructor called as a function internally use the ToNumber abstract operation. ToNumber will use two more internal operations.. a function internally use the ToNumber abstract operation. ToNumber will use two more internal operations ToPrimitive and DefaultValue.. operations ToPrimitive and DefaultValue . When the ToNumber operation is applied to an Object such the empty array in your..

Can you explain why ++[[]][+[]]+[+[]] = “10”?

http://stackoverflow.com/questions/7202157/can-you-explain-why-10

expr be the result of evaluating UnaryExpression. Return ToNumber GetValue expr . ToNumber says Object Apply the following steps.. UnaryExpression. Return ToNumber GetValue expr . ToNumber says Object Apply the following steps Let primValue be ToPrimitive.. expr be the result of evaluating UnaryExpression. Return ToNumber GetValue expr . ToNumber is defined for as The MV of StringNumericLiteral..

Why does ('0' ? 'a' : 'b') behave different than ('0' == true ? 'a' : 'b')

http://stackoverflow.com/questions/7496727/why-does-0-a-b-behave-different-than-0-true-a-b

If Type y is Boolean return the result of the comparison x ToNumber y . When booleans are converted to numbers the following conversion.. and Type y is Number return the result of the comparison ToNumber x y. How strings are converted to numbers is more complex but..

Why is 0 == “” true in JavaScript

http://stackoverflow.com/questions/7605011/why-is-0-true-in-javascript

and Type y is String return the result of the comparison x ToNumber y . Source http es5.github.com #x11.9.3 share improve this..

What is the explanation for these bizarre JavaScript behaviours mentioned in the 'Wat' talk for CodeMash 2012?

http://stackoverflow.com/questions/9032856/what-is-the-explanation-for-these-bizarre-javascript-behaviours-mentioned-in-the

is the same as . The unary operator 禮11.4.6 returns ToNumber ToPrimitive operand . As we already know ToPrimitive is the.. ToPrimitive is the empty string and according to 禮9.3.1 ToNumber is 0. Similar to the previous case the first is parsed as a.. as a block with empty return value. Again is the same as ToNumber ToPrimitive and ToPrimitive is object Object see . So to get..

Is there a good JS shorthand reference out there?

http://stackoverflow.com/questions/3899495/is-there-a-good-js-shorthand-reference-out-there

b is always positive a new Date new Date .getTime toString toNumber toBoolean a 5 a will be the number five toNumber a 5 6 56 toString.. toString toNumber toBoolean a 5 a will be the number five toNumber a 5 6 56 toString a exists true toBoolean share improve this..

In Javascript, <int-value> == “<int-value>” evaluates to true. Why is it so?

http://stackoverflow.com/questions/664886/in-javascript-int-value-int-value-evaluates-to-true-why-is-it-so

Step 16 applies to your former example 0 0 apply 16 0 toNumber 0 0 0 apply 7 true And step 18 then step 16 apply to the latter.. 18 then step 16 apply to the latter true true apply 18 toNumber true true 1 true apply 16 1 toNumber true 1 NaN apply 6 false..

Convert NaN to 0 in javascript

http://stackoverflow.com/questions/7540397/convert-nan-to-0-in-javascript

for more than just NaN then you can do the same but do a toNumber conversion first. a a 0 This uses the unary operator to try..

Addition is not working in JavaScript

http://stackoverflow.com/questions/8377410/addition-is-not-working-in-javascript

2 2 4 true The other arithmetic operators will perform a toNumber conversion on the string s . '3' '5' 15 true A quick way to..