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Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:
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now the sendgrid command is heroku addons:add sendgrid:starter (view usage details at devcenter.heroku.com/articles/sendgrid)
– Danny
Oct 27 '11 at 14:33
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How does Bluebird's util.toFastProperties function make an object's properties “fast”?
...object->HasFastProperties()) {
MigrateSlowToFast(object, 0);
}
}
Now, JSObject::MigrateSlowToFast just explicitly takes the Dictionary and converts it into a fast V8 object. It's a worthwhile read and an interesting insight into v8 object internals - but it's not the subject here. I still ...
How to check if a table exists in a given schema
...ore slightly faster.
to_regclass(rel_name) in Postgres 9.4+
Much simpler now:
SELECT to_regclass('schema_name.table_name');
Same as the cast, but it returns ...
... null rather than throwing an error if the name is not found
...
Hiding the scroll bar on an HTML page
...uto, but I'm not a fan of abusing width for visibility tweaks.
Firefox 64 now supports the experimental scrollbar-width property by default (63 requires a configuration flag to be set). To hide the scrollbar in Firefox 64:
#element {
scrollbar-width: none;
}
To see if your current browser su...
Alternative for PHP_excel
... from Sourceforge (spreadsheetML only)
Ilia Alshanetsky's Excel extension now on github (xls and xlsx, and requires commercial libXL component)
PHP's COM extension (requires a COM enabled spreadsheet program such as MS Excel or OpenOffice Calc running on the server)
The Open Office alternative to C...
C++ display stack trace on exception
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And archive.org doesn't know it, either. Damn. Well, the procedure should be clear: throw a custom class' object that records the stack trace at the time of the throw.
– Thomas Tempelmann
May 20 '15 at 21:21
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Definition of “downstream” and “upstream”
...ushing to upstream ("otherRepo" is still "upstream", where the information now goes back to).
Note the "from" and "for": you are not just "downstream", you are "downstream from/for", hence the relative aspect.
The DVCS (Distributed Version Control System) twist is: you have no idea what downstr...
A monad is just a monoid in the category of endofunctors, what's the problem?
...nsformation, μ : T × T → T, where × means functor composition (μ is known as join in Haskell)
A natural transformation, η : I → T, where I is the identity endofunctor on X (η is known as return in Haskell)
...satisfying these laws:
μ ∘ Tμ = μ ∘ μT
μ ∘ Tη = μ ∘ ηT = 1 (the...
How to store a command in a variable in a shell script?
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$(...) is now recommended instead of backticks. y=$(eval $x) mywiki.wooledge.org/BashFAQ/082
– James Broadhead
Mar 11 '12 at 20:35
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Difference between java.util.Random and java.security.SecureRandom
...l purposes. This also means that your random numbers are predictable right now, something you don't want for session IDs and the like.
How to break a Linear Congruential Generator
The assumption that an attacker would have to wait for the LCG to repeat after a full cycle is wrong. Even with an opt...