If you only have one reference to a string and you concatenate another string to the end, CPython now special cases this and tries to extend the string in place. The end result is that the operation is amortized O(n). e.g. used to be O(n^2), but now it is O(n). From the source (bytesobject.c): It’s … Read more
If you only have one reference to a string and you concatenate another string to the end, CPython now special cases this and tries to extend the string in place. The end result is that the operation is amortized O(n). e.g. used to be O(n^2), but now it is O(n). From the source (bytesobject.c): It’s … Read more
e.g, keep.update(xrange(11)) for your specific example. Or, if you have to produce the values in a loop for some other reason, But, of course, doing it in bulk with a single .update call is faster and handier, when otherwise feasible.
The main difference is that appendChild is a DOM method and append is a jQuery method. The second one uses the first as you can see on jQuery source code If you’re using jQuery library on your project, you’ll be safe always using append when adding elements to the page.
Use the Array.prototype.push method to append values to the end of an array: Run code snippet You can use the push() function to append more than one value to an array in a single call: Run code snippet Update If you want to add the items of one array to another array, you can use firstArray.concat(secondArray): Run code snippet Update … Read more
append: Appends object at the end. gives you: [1, 2, 3, [4, 5]] extend: Extends list by appending elements from the iterable. gives you: [1, 2, 3, 4, 5]