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How can I access and process nested objects, arrays or JSON?
...are also called the "properties".
Properties can be accessed either using dot notation
const value = obj.someProperty;
or bracket notation, if the property name would not be a valid JavaScript identifier name [spec], or the name is the value of a variable:
// the space is not a valid character ...
Difference between a user and a schema in Oracle?
...so automatically creates a schema for that user.
The CREATE SCHEMA command does not create a "schema" as it implies, it just allows you to create multiple tables and views and perform multiple grants in your own schema in a single transaction.
For all intents and purposes you can consider a user to ...
PHP + MySQL transactions examples
...a I generally use when working with transactions looks like this (semi-pseudo-code):
try {
// First of all, let's begin a transaction
$db->beginTransaction();
// A set of queries; if one fails, an exception should be thrown
$db->query('first query');
$db->query('sec...
How to check iOS version?
...SClassFromString:
if (NSClassFromString(@"UIPopoverController")) {
// Do something
}
For weakly linked classes, it is safe to message the class, directly. Notably, this works for frameworks that aren't explicitly linked as "Required". For missing classes, the expression evaluates to nil, fail...
Add new row to dataframe, at specific row-index, not appended?
..., ]) 801.161 831.7730 854.6320 881.6560 10641.417
Benchmarks
As @MatthewDowle always points out to me, benchmarks need to be examined for the scaling as the size of the problem increases. Here we go then:
benchmarkInsertionSolutions <- function(nrow=5,ncol=4) {
existingDF <- as.data.fra...
Traversing text in Insert mode
...ery familiar with it.
The right way is to press Esc, go where you want to do a small correction, fix it, go back and keep editing. It is effective because Vim has much more movements than usual character forward/backward/up/down. After you learn more of them, this will happen to be more productiv...
Rails extending ActiveRecord::Base
I've done some reading about how to extend ActiveRecord:Base class so my models would have some special methods. What is the easy way to extend it (step by step tutorial)?
...
How to define two angular apps / modules in one page?
...
Only one AngularJS application can be auto-bootstrapped per HTML document. The first ngApp found in the document will be used to define the root element to auto-bootstrap as an application. To run multiple applications in an HTML document you must manually bootstrap them using angular.boot...
When monkey patching an instance method, can you call the overridden method from the new implementat
... in that case, there is only place you need to change.
Delegation
If you do not control creation of the Foo objects, for example because they are created by a framework that is outside of your control (like ruby-on-rails for example), then you could use the Wrapper Design Pattern:
require 'delega...
Should I choose ActivePerl or Strawberry Perl for Windows? [duplicate]
... like to try it out. I read about two rival distributions available for Windows platform (I guess there's just Perl on other OSes :).
...