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Difference between GeoJSON and TopoJSON
...l shapefile : bl.ocks.org/4485308 and bl.ocks.org/4348435. TopoJSON really started to sink in when I finally grasped how I could represent multiple features (national, departmental, and municipal boundaries) with the same data in the same file (you can't do that with geojson). This is accomplished ...
Postgres manually alter sequence
...ts_id_seq LASTVALUE 22
This would work:
ALTER SEQUENCE payments_id_seq RESTART WITH 22;
and is equivalent to:
SELECT setval('payments_id_seq', 22, FALSE);
More in the current manual for ALTER SEQUENCE and sequence functions.
Note that setval() expects either (regclass, bigint) or (regclass, ...
How to add text inside the doughnut chart using Chart.js?
...nt, and the text. The plugin takes care of the rest.
The plugin code will start with a base font size of 30px. From there it will check the width of the text and compare it against the radius of the circle and resize it based off the circle/text width ratio.
It has a default minimum font size of 2...
redirect COPY of stdout to log file from within bash script itself
...'m not sure what Barry was about, either. Bash's exec is documented not to start new processes, >(tee ...) is a standard named pipe / process substitution, and the & in the redirection of course has nothing to do with backgrounding... ?:-)
– DevSolar
Aug...
How do I find out if first character of a string is a number?
...harAt(0) and substring(0, 1) will throw a StringIndexOutOfBoundsException. startsWith does not have this problem.
To make the entire condition one line and avoid length checks, you can alter the regexes to the following:
s.matches("\\d.*")
// or the equivalent
s.matches("[0-9].*")
If the conditi...
How do I ignore files in Subversion?
...irectories.
I note that the command-line syntax is counter-intuitive.
I started-off assuming that you would ignore a file in SVN by typing something like svn ignore pathToFileToIgnore.txt however this is not how SVN's ignore feature works.
3- The svn:global-ignores property. Requires SVN 1.8 (...
Test for existence of nested JavaScript object key
...ethod are null or undefined, otherwise it will call the function.
You can start playing with this feature with Babel using the optional chaining plugin.
Since Babel 7.8.0, ES2020 is supported by default
Check this example on the Babel REPL.
????????UPDATE: December 2019 ????????
The optional ch...
What is the optimal algorithm for the game 2048?
...hly unlikely (e.g. it was reached by getting 6 "4" tiles in a row from the starting position). The typical search depth is 4-8 moves.
Heuristics
Several heuristics are used to direct the optimization algorithm towards favorable positions. The precise choice of heuristic has a huge effect on the pe...
Pass data to layout that are common to all pages
...g. I use Controller.OnActionExecuting method to populate it.
Then, at the start of layout you can pull this object back from ViewBag and continue to access this strongly typed object.
share
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impro...
What is a mutex?
...egment if the mutex is only ever used around that code but, the minute you start using the mutex in multiple places in your code, your explanation fails. Typically it can also be used to protect some data structure, which may be accessed from many places in the code.
– paxdiabl...