17 questions
-2
votes
1
answer
32
views
Triple equal in JavaScript compare the value of type first? [duplicate]
Triple equal measure the value as well as type. But I want to know the order like it first compares the value and returns on false or vice versa.
- 129
0
votes
0
answers
293
views
does javascript equality for 2.0 === 2 - hold true for all browsers
I want to write a function to trim additional decimal 0's from floating point numbers like 2.0, 5.00 but not 3.04.
so I wrote this:
const trimZeroFromDecimal = value =>
parseInt(value) === value ...
- 1,832
0
votes
0
answers
66
views
FMOD in PHP results not being seen as equal to their float equivalent
So I understand that FMOD gives some wacky answers sometimes because its sort of approximate.
But even given that I'm struggling to utilize the answers it throws up later-on in the code.
For instance, ...
0
votes
1
answer
63
views
Javascript checking, if array element equals var?
I have an array like this:
var str = "This is an example sentence with the number 1";
var array = str.split(' ');
// array[8] should be 1
Now i want to check, if a certain variable is the ...
- 51
0
votes
0
answers
34
views
Which other literal values apart from NaN - are not equal to themselves
It's a known fact in Js that the value NaN is not equal to itself
console.log(NaN === NaN)
// false
Which other Javascript literal values are not equal to themselves - or is NaN the only value??
I'...
- 1,832
1
vote
4
answers
1k
views
Are there any triple equals === methods outside of Cats in Scala?
I have spent a while searching on Google for a non-Cats triple equals method, but can't find anything apart from Scalaz. Unfortunately, I have been unable to work out the import for === in this ...
- 107
4
votes
7
answers
110
views
! next to a number in a conditional prints true on strict comparison
console.log(false === 0) // false
console.log(false === !1) // true, why does it equate to true using !?
and vice versa for
console.log(true === 1 ) // false
console.log(true === !0) // true
I ...
- 49
1
vote
1
answer
59
views
2 equalities on an IF conditional like in python
I'm starting to learn javascript for front-end programming, being python my first language to learn completely.
So I'm trying to solve a while loop excersise that console-logs every number from 50-...
- 456
2
votes
1
answer
7k
views
PHP - Are empty arrays considered as null [duplicate]
The following code gives TRUE,FALSE,FALSE,FALSE,
I dont understand the TRUE response on empty arrays.
Someone has an explanation?
$results=array();
// Case 1 : Empty array
$myArray=array();
...
- 619
8
votes
5
answers
2k
views
Meaning of === with function call
I had been going through the ES6 assuming that it would be easy to switch to EcmaScript 2017.
While going through, I got confused about this code
function f (x, y = 7, z = 42) {
return x + y + z
...
- 2,679
2
votes
1
answer
3k
views
Javascript comparisons == null alternatives
In JavaScript code I want to replace the double-equals structure of the following if-statement:
if( name == null ) {
//do stuff
}
The double equals fail for the jshint rule "eqeqeq", where it's ...
- 113k
-1
votes
3
answers
852
views
'hello' == (anything that will return true other than 'hello') in JavaScript?
I understand that == in JavaScript is comparison with type coercion. And I know that the following statements are true:
'' == false;
' ' == false;
'0' == false;
'\n' == false;
However, I can't get a ...
- 52.8k
0
votes
1
answer
101
views
Changing == to === in if(window.location == 'x') causes the block not to execute
I'm checking over my code for uses of == instead of ===, but changing this line:
if(window.location == 'app:/test.html')
To this:
if(window.location === 'app:/test.html')
Results in the block no ...
- 21.1k
1
vote
1
answer
560
views
How to perform triple equals as negation
I am learning scala, and want to write my tests with ===. However, I am curious if there is a way to do something like this:
assert(1 !=== 2)
I have tried the above, !==, and !(===)
Is there any way ...
- 67.2k
4
votes
2
answers
2k
views
JavaScript triple equals and three-variable comparison
Can somebody explain this?
1 == 1 //true, as expected
1 === 1 //true, as expected
1 == 1 == 1 //true, as expected
1 == 1 == 2 //false, as expected
1 === 1 === 2 //false, as expected
...
user1318194
4
votes
3
answers
775
views
Javascript idiom: What does if (x === +x) do? [duplicate]
Reading through the source code of underscore.js I stumbled upon the following line:
... if (obj.length === +obj.length) { ...
That's a bit confusing for me. What is actually being compared here? I ...
- 4,581
18
votes
1
answer
3k
views
How do I do a strict equals/triple equals comparison in phpunit?
How do I do a ===/strict equals comparison in phpunit?
- 286k