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The fastest way, in this case, is looping through all elements, and compare it to the highest/lowest value, so far.

(Creating an array, invoking array methods is overkill for this simple operation).

 // There's no real number bigger than plus Infinity var lowest = Number.POSITIVE_INFINITY; var highest = Number.NEGATIVE_INFINITY; var tmp; for (var i=myArray.length-1; i>=0; i--) { tmp = myArray[i].Cost; if (tmp < lowest) lowest = tmp; if (tmp > highest) highest = tmp; } console.log(highest, lowest); 

One way is to loop through all elements and compare it to the highest/lowest value.

(Creating an array, invoking array methods is overkill for this simple operation).

 // There's no real number bigger than plus Infinity var lowest = Number.POSITIVE_INFINITY; var highest = Number.NEGATIVE_INFINITY; var tmp; for (var i=myArray.length-1; i>=0; i--) { tmp = myArray[i].Cost; if (tmp < lowest) lowest = tmp; if (tmp > highest) highest = tmp; } console.log(highest, lowest); 

The fastest way, in this case, is looping through all elements, and compare it to the highest/lowest value, so far.

(Creating an array, invoking array methods is overkill for this simple operation).

 // There's no real number bigger than plus Infinity var lowest = Number.POSITIVE_INFINITY; var highest = Number.NEGATIVE_INFINITY; var tmp; for (var i=myArray.length-1; i>=0; i--) { var tmp = myArray[i].Cost; if (tmp < lowest) lowest = tmp; if (tmp > highest) highest = tmp; } console.log(highest, lowest); 

The fastest way, in this case, is looping through all elements, and compare it to the highest/lowest value, so far.

(Creating an array, invoking array methods is overkill for this simple operation).

 // There's no real number bigger than plus Infinity var lowest = Number.POSITIVE_INFINITY; var highest = Number.NEGATIVE_INFINITY; var tmp; for (var i=myArray.length-1; i>=0; i--) { tmp = myArray[i].Cost; if (tmp < lowest) lowest = tmp; if (tmp > highest) highest = tmp; } console.log(highest, lowest); 

The fastest way, in this case, is looping through all elements, and compare it to the highest/lowest value, so far.

(Creating an array, invoking array methods is overkill for this simple operation).

 // There's no real number bigger than plus Infinity var lowest = Number.POSITIVE_INFINITY; // Or: Infinity (-Infinity for NEGATIVE) var tmp; for (var i=myArray.length-1; i>=0; i--) { var tmp = myArray[i].Cost; // Replace < with > for getting the highest number if (tmp < lowest) lowest = tmp; } 

The fastest way, in this case, is looping through all elements, and compare it to the highest/lowest value, so far.

(Creating an array, invoking array methods is overkill for this simple operation).

 // There's no real number bigger than plus Infinity var lowest = Number.POSITIVE_INFINITY; var highest = Number.NEGATIVE_INFINITY; var tmp; for (var i=myArray.length-1; i>=0; i--) { var tmp = myArray[i].Cost; if (tmp < lowest) lowest = tmp; if (tmp > highest) highest = tmp; } console.log(highest, lowest);