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Append an object to a list in R in amortized constant time, O(1)?
... for(i in 1:n) {a <- list(a, list(i))}
},
by_index = {
a <- list(0)
for(i in 1:n) {a[length(a) + 1] <- i}
a
},
append_ = {
a <- list(0)
for(i in 1:n) {a <- append(a, i)}
...
What is the difference between Ruby 1.8 and Ruby 1.9
...> ?c
=> "c"
Ruby 1.8.6
irb(main):001:0> ?c
=> 99
String index.
Ruby 1.9
irb(main):001:0> "cat"[1]
=> "a"
Ruby 1.8.6
irb(main):001:0> "cat"[1]
=> 97
{"a","b"} No Longer Supported
Ruby 1.9
irb(main):002:0> {1,2}
SyntaxError: (irb):2: syntax error, unexpecte...
What does “./” (dot slash) refer to in terms of an HTML file path location?
...
./ is the the folder that the working file is in:
So in /index.htm ./ is the root directory
but in /css/style.css ./ is the css folder.
This is important to remember because if you move CSS from /index.htm to /css/style.css the path will change.
...
Getting an object from an NSSet
If you can't get an object with objectAtIndex: from an NSSet then how do you retrieve objects?
8 Answers
...
How to cancel a local git commit
...
You can tell Git what to do with your index (set of files that will become the next commit) and working directory when performing git reset by using one of the parameters:
--soft: Only commits will be reseted, while Index and the working directory are not altere...
jquery save json data object in cookie
... cookie
check - check existance
verify - verify cookie value if JSON
check_index - verify if index exists in JSON
read_values - read cookie value as string
read_JSON - read cookie value as JSON object
read_value - read value of index stored in JSON object
replace_value - replace value from a specifi...
Aborting a stash pop in Git
...y.
The reverse merge requires that all current changes be pushed into the index:
git add -u
Then invert the merge-recursive that was done by git stash apply:
git merge-recursive stash@{0}: -- $(git write-tree) stash@{0}^1
Now you will be left with just the non-stash changes. They will be i...
How can I find the latitude and longitude from address?
...
@Quantumdroid above code is written in fragment. Otherwise you are absolutely correct. It's context.
– Nayanesh Gupte
Sep 23 '15 at 5:56
...
Way to go from recursion to iteration
..., int left, int right)
{
if(left >= right)
return;
int index = partition(array, left, right);
quicksort(array, left, index - 1);
quicksort(array, index + 1, right);
}
Here's how we could make it iterative by keeping our own stack:
void quicksort(int *array, int left, i...
JavaScript before leaving the page
...ad = function(){
return 'Are you sure you want to leave?';
};
Or with jQuery:
$(window).bind('beforeunload', function(){
return 'Are you sure you want to leave?';
});
This will just ask the user if they want to leave the page or not, you cannot redirect them if they select to stay on the pa...