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What does the question mark and the colon (?: ternary operator) mean in objective-c?
...it no longer is a ternary operator but a binary operator. Binary operators include the vast majority of the operators we usually use when programming (*,+,-,^, |,||, &, >>, etc).
– tomacco
Feb 5 '18 at 18:07
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Ruby on Rails: Delete multiple hash keys
...swer might be
params.delete_if { |k,v| [:controller, :action, :other_key].include? k }
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Laravel - Route::resource vs Route::controller
...
public function store() {}
}
You can also choose what actions are included or excluded like this:
Route::resource('users', 'UsersController', [
'only' => ['index', 'show']
]);
Route::resource('monkeys', 'MonkeysController', [
'except' => ['edit', 'create']
]);
RESTful Reso...
Maximum single-sell profit
...th buyDay ≤ sellDay , such that if we bought the stock on buyDay and sold it on sellDay , we would maximize our profit.
...
Should I choose ActivePerl or Strawberry Perl for Windows? [duplicate]
...e at least, ActivePerl is a much more convenient choice. The PPM installer included in ActivePerl allows you to add alternative PPM repositories which will give you access to almost all useful Perl modules available on CPAN - but prepared and tested for Windows. This was for me, in the long run, a m...
How to see the values of a table variable at debug time in T-SQL?
...test is a table valued function and it throws the error "Select statements included within a function cannot return data to a client". Is there any other way, specially to examine via debugging tools provided?
– Faiz
Dec 15 '09 at 5:23
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What goes into your .gitignore if you're using CocoaPods?
...amus are now polarising the debate... it's really not fair to say that not including the Pods directory will cause you pain, when checking it in also comes with its own bundle of problems. e.g. a developer bumps a version of a dependency in a Podfile without remembering to check in the updated sour...
jQuery: Check if div with certain class name exists
...elected answer uses a perf test, but it's slightly flawed since it is also including element selection as part of the perf, which is not what's being tested here. Here is an updated perf test:
http://jsperf.com/check-if-div-exists/3
My first run of the test shows that property retrieval is faster ...
What is the difference between SQL, PL-SQL and T-SQL?
...ata definition language and a data manipulation language. The scope of SQL includes data insert, query, update and delete, schema creation and modification, and data access control. Although SQL is often described as, and to a great extent is, a declarative language (4GL), it also includes procedura...
How can I check for “undefined” in JavaScript? [duplicate]
...cript 5th ed., and undefined is non-writable.
if (window.myVar) will also include these falsy values, so it's not very robust:
false
0
""
NaN
null
undefined
Thanks to @CMS for pointing out that your third case - if (myVariable) can also throw an error in two cases. The first is when the variabl...