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How to generate and validate a software license key?
...hen:
Generate yourself a secret key for the product
Take the user's name
Concatentate the users name and the secret key and hash with (for example) SHA1
Unpack the SHA1 hash as an alphanumeric string. This is the individual user's "Product Key"
Within the program, do the same hash, and compare wit...
Limits of Nat type in Shapeless
...
Here is an example of a Concat type class that allows to concatenate two type-level strings via a macro. A type class for summing type-level integers would probably look very similar.
– Frank S. Thomas
Apr 16 '...
Concatenate strings in Less
...e it was changing my background-image url, and I wasn't too sure how to do concatenation :)
– hatsrumandcode
Dec 22 '15 at 16:18
7
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How to get the URL without any parameters in JavaScript?
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You can concat origin and pathname, if theres present a port such as example.com:80, that will be included as well.
location.origin + location.pathname
sha...
What is the most efficient/elegant way to parse a flat table into a tree?
...r_id = 1
ORDER BY f.name;
Re comment from @Nate:
SELECT f.name, GROUP_CONCAT(b.ancestor_id order by b.path_length desc) AS breadcrumbs
FROM FlatTable f
JOIN ClosureTable a ON (f.id = a.descendant_id)
JOIN ClosureTable b ON (b.descendant_id = a.descendant_id)
WHERE a.ancestor_id = 1
GROUP BY...
Remove the last three characters from a string
...to remove a certain number of characters from the end of a string:
string.Concat("hello".Reverse().Skip(3).Reverse());
output:
"he"
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How to detect READ_COMMITTED_SNAPSHOT is enabled?
...null_dflt_on SET
ansi_warnings SET
ansi_padding SET
ansi_nulls SET
concat_null_yields_null SET
isolation level read committed
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SQL: capitalize first letter only [duplicate]
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select replace(wm_concat(new),',','-') exp_res from (select distinct initcap(substr(name,decode(level,1,1,instr(name,'-',1,level-1)+1),decode(level,(length(name)-length(replace(name,'-','')))+1,9999,instr(name,'-',1,level)-1-decode(level,1,0,i...
Why is using the JavaScript eval function a bad idea?
...name to: badHackerGuy'); doMaliciousThings(); and if you take my username, concat it into some script and eval it in other people's browsers then I can run any javascript I want on their machines (e.g. force them to +1 my posts, post their data to my server, etc.)
– Prestaul
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How to join two generators in Python?
...
In Python (3.5 or greater) you can do:
def concat(a, b):
yield from a
yield from b
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