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Why does range(start, end) not include end?
...s which equals len(range(0, 10)). Remember that programmers prefer 0-based indexing.
Also, consider the following common code snippet:
for i in range(len(li)):
pass
Could you see that if range() went up to exactly len(li) that this would be problematic? The programmer would need to explicitl...
JSTL in JSF2 Facelets… makes sense?
...mponent already ensured the uniqueness of the client ID based on iteration index; it's also not possible to use EL in id attribute of child components this way as it is also evaluated during view build time while #{item} is only available during view render time. Same is true for an h:dataTable and ...
How to iterate over the keys and values in an object in CoffeeScript?
...ng array comprehension, which can be used as a one-line loop.
console.log index + ": " + elm for index, elm of array
Array comprehension are:
"Comprehensions replace (and compile into) for loops, with optional
guard clauses and the value of the current array index. Unlike for
loops, array...
Favorite (G)Vim plugins/scripts? [closed]
...
Nerdtree
The NERD tree allows you to explore your filesystem and to open files and
directories. It presents the filesystem to you in the form of a tree which you
manipulate with the keyboard and/or mouse. It also allows you to perform
simple filesy...
How to return value from an asynchronous callback function? [duplicate]
...
This is impossible as you cannot return from an asynchronous call inside a synchronous method.
In this case you need to pass a callback to foo that will receive the return value
function foo(address, fn){
geocoder.geocode( { 'address': address}, function(results, status) {
fn(r...
Add new row to dataframe, at specific row-index, not appended?
... 17
3 3 8 13 18
4 1 2 3 4
41 4 9 14 19
5 5 10 15 20
(Note we index r differently).
And finally, benchmarks:
library(microbenchmark)
microbenchmark(
rbind(existingDF[1:r,],newrow,existingDF[-(1:r),]),
insertRow(existingDF,newrow,r)
)
Unit: microseconds
...
What is an SSTable?
... (typically each block is 64KB in size, but this is configurable). A block index (stored at the end of the SSTable) is used to locate blocks; the index is loaded into memory when the SSTable is opened. A lookup can be performed with a single disk seek: we first find the appropriate block by performi...
Pandas aggregate count distinct
... @guy Try df.groupby('date').agg({'user_id': lambda s: s.unique().reset_index(drop=True)})
– BallpointBen
Aug 14 '18 at 19:01
...
Good tutorial for using HTML5 History API (Pushstate?) [closed]
... mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.html$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.html [L]
</IfModule>
Nginx
rewrite ^(.+)$ /index.html last;
...
Choose Git merge strategy for specific files (“ours”, “mine”, “theirs”)
...t;paths>...
--ours
--theirs
When checking out paths from the index, check out stage #2 (ours) or #3 (theirs) for unmerged paths.
The index may contain unmerged entries because of a previous failed merge. By default, if you try to check out such an entry from the index, the checkou...