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Blocks and yields in Ruby
...e is trivial. More interesting usages are to filter all the elements in an array:
days = ["monday", "tuesday", "wednesday", "thursday", "friday"]
# select those which start with 't'
days.select do | item |
item.match /^t/
end
=> ["tuesday", "thursday"]
Or, we can also provide a c...
Accessing a Dictionary.Keys Key through a numeric index
... There's no guarantee that the last inserted key will be at the end of the array. The ordering for Keys on MSDN is unspecified, and subject to change. In my very brief test, it does seem to be in order of insertion, but you'd be better off building in proper bookkeeping like a stack--as you suggest ...
Random date in C#
...ping that nobody is going to use it as: for (int i = 0; i < 100; i++) { array[i].DateProp = RandomDayFunc()(); }
– Aidiakapi
Mar 29 '14 at 11:54
2
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Get absolute path of initially run script
...s no mention that the initially run script's path is the first item of the array returned by get_included_files(). I suggest to store __FILE__ into a constant at the beginning of the script meant to be initially run.
– Paolo
Nov 16 '19 at 14:04
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What is the best way to add options to a select from a JavaScript object with jQuery?
...mentioning you should avoid DOM updates in loops. jsperf.com/jquery-append-array-vs-string
– jthomas
Jun 3 '15 at 3:48
6
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How to create a file in Android?
...tStreamReader isr = new InputStreamReader(fIn);
/* Prepare a char-Array that will
* hold the chars we read back in. */
char[] inputBuffer = new char[TESTSTRING.length()];
// Fill the Buffer with data from the file
isr.read(inputBuffer);
// Transfor...
How to get nice formatting in the Rails console
...This raise error: JSON::GeneratorError: only generation of JSON objects or arrays allowed
– Hassan Akram
Sep 27 '16 at 9:14
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JSON, REST, SOAP, WSDL, and SOA: How do they all link together
...script can evaluate this format by eval() function and make an associative array from this JSON string. This one is different concept in comparison to other concepts I described formerly.
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im...
Run a single migration file
...rnative way (without IRB) which relies on the fact that require returns an array of class names:
script/runner 'require("db/migrate/20090408054532_add_foos.rb").first.constantize.up'
Note that if you do this, it probably won't update the schema_migrations table, but it seems like that's what you ...
Algorithm to generate a crossword
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@NeilN Python's array.sort(key=f) is stable, which means (for example) that simply sorting an alphabetical word list by length would keep all the 8-letter words alphabetically sorted.
– Lynn
Apr 12 '19 ...