I have an array something like:
['honda accord', '1986 honda accord', '1990 honda accord', '2000 honda accord', '2011 honda accord', '2016 honda accord'].
I need to sort this in javascript so that the result is:
['honda accord', '2016 honda accord', '2011 honda accord', '2000 honda accord', '1990 honda accord', '1986 honda accord'].
how can i do this.
array.sort()
does not work. I know i need to send a function to sort.
Thanks Brian
You could use split and check first item of the string
var arr = ['honda accord', '1986 honda accord', '1990 honda accord', '2000 honda accord', '2011 honda accord', '2016 honda accord'];
arr.sort((a, b) => b.split(' ')[0] - a.split(' ')[0])
document.write(JSON.stringify(arr));Working Fiddle : https://jsfiddle.net/7nu7bp3g/
var arr = [
'honda accord',
'1986 honda accord',
'1990 honda accord',
'2000 honda accord',
'2011 honda accord',
'2016 honda accord'
];
var sortArr = arr.sort(function(a, b) {
return b.split(' ')[0] - a.split(' ')[0];
});
console.log(sortArr);
I hope it will work.
It is not very elegant (or efficient) but it works. Essentially it uses Regular Expression to extract the year from each car and then compare.
// the regular expression to extract the year and car
var regEx = /((\d+)\s)*(.*)/;
var list = ['honda accord', '1986 honda accord', '1990 honda accord', '2000 honda accord', '2011 honda accord', '2016 honda accord'];
// custom sort function
list.sort(function(a, b)
{
// get the car details
var aR = regEx.exec(a);
var bR = regEx.exec(b);
var aCar = aR[3];
var bCar = bR[3];
var aYear = aR[2];
var bYear = bR[2];
// compare the strings
if(aCar < bCar) return -1;
else if(aCar > bCar) return 1;
// we'll only get this far if both strings are the same
// if there was no year provided then it should be first
else if(!aYear) return -1;
else if(!bYear) return 1;
// at this point the car types are the same, and both have an year so compare the year
else if(aYear < bYear) return 1;
else if(aYear > bYear) return -1;
return 0;
})
You could make it more efficient by pre-processing the list to run the regex on all of the items.
A solution with replace if no year is given
var array = ['honda accord', '1986 honda accord', '1990 honda accord', '2000 honda accord', '2011 honda accord', '2016 honda accord'];
array.sort((a, b) => b.replace(/^\D*$/g, '9999 $1').localeCompare(a.replace(/^\D*$/g, '9999 $1')));
document.write('<pre>' + JSON.stringify(array, 0, 4) + '</pre>');