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Fastest way to check if a string is JSON in PHP?
...e the JSON data
// set second parameter boolean TRUE for associative array output.
$result = json_decode($json);
if (json_last_error() === JSON_ERROR_NONE) {
// JSON is valid
}
// OR this is equivalent
if (json_last_error() === 0) {
// JSON is valid
}
Note that json_last_error is suppor...
Cartesian product of multiple arrays in JavaScript
...rtesian(f(a, b), ...c) : a);
Special thanks to ZuBB for letting me know about linter problems with the original code.
Update 2020:
Since I wrote this answer we got even better builtins, that can finally let us reduce (no pun intended) the code to just 1 line!
const cartesian =
(...a) => a.redu...
How to prevent browser page caching in Rails
...
Finally figured this out - http://blog.serendeputy.com/posts/how-to-prevent-browsers-from-caching-a-page-in-rails/ in application_controller.rb
After Rails 5:
class ApplicationController < ActionController::Base
before_action :set_cache_h...
How to process POST data in Node.js?
...ood point. It shouldn't be difficult to add that, though, so I'll leave it out of the example to keep things simple.
– Casey Chu
Dec 27 '11 at 6:48
76
...
DateTime2 vs DateTime in SQL Server
... and force you to convert to a string literal. If you're concerned more about compatability than precision, use datetime
– FistOfFury
Jun 25 '14 at 20:49
...
Is there a way to automate the android sdk installation?
....
In its third form, all installed and available packages are printed
out.
In its fourth form (with --licenses), show and offer the option to
accept licenses for all available packages that have not already been
accepted.
Common Arguments:
--sdk_root=<sdkRootPath>: Use the...
Why is early return slower than else?
...
This is a pure guess, and I haven't figured out an easy way to check whether it is right, but I have a theory for you.
I tried your code and get the same of results, without_else() is repeatedly slightly slower than with_else():
>>> T(lambda : without_else()...
correct way to use super (argument passing)
So I was following Python's Super Considered Harmful , and went to test out his examples.
3 Answers
...
Is there an XSLT name-of element?
...
local-name is what you want 9 times out of 10
– annakata
Feb 25 '09 at 9:22
20
...
Global access to Rake DSL methods is deprecated
... installed, you'll be prompted to pick a version.
After 0.9.1 was cleaned out, I ran
bundle update rake
and was finally able to create my database files. I was using rake db:create, but it should work for rake db:migrate as well.
I hope it helps.
...