What distinguishes checking an array's length as a truthy value from verifying that it is greater than zero?
In simple terms, is there any advantage in utilizing one of these conditions over the other:
var arr = [1,2,3];
if (arr.length) {
}
if (arr.length > 0) {
}
Can we distinguish between viewing an array's length as a truthy value versus ensuring that it is more than 0?
Considering that the value of arr.length can only be 0 or greater, and since only 0 evaluates to false, there is no distinction.
Typically, Boolean(n) and Boolean(n > 0) produce different outcomes for n < 0.
In simpler terms, is there any preference in using one statement over the other?
The choice may depend on readability and comprehension of the code, rather than altering its behavior.
Using array.length instead of array.length > 0 can improve speed and reduce code length.if(array.length){...} behaves similarly to if(0){...} or if(false){...}
In the realm of JavaScript, distinctions are not drawn.
Ultimately, anything within the parentheses of an if statement will result in either a true or false value.
To explore all possible false values, check out All falsey values in JavaScript
If you aim for clarity and specificity, opt for:
if (arr.length > 0) {
}
For brevity, go with:
if (arr.length) {
}
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