db.posts.find().forEach(function(doc){
if(doc.arrayOfObjects){
// the false, true at the end refers to $upsert, and $multi, respectively
db.accounts.update({_id: doc._id}, {$unset: {'arrayOfObjects': "" }}, false, true);
}
});
var timestamp = Math.floor(new Date(1974, 6, 25).getTime() / 1000);
var hex = ('00000000' + timestamp.toString(16)).substr(-8); // zero padding
var objectId = new ObjectId(hex + new ObjectId().str.substring(8));
Feature detection of classes can partly be done with the property_exists and method_exists functions.
class MyClass {
public $public_field;
protected $protected_field;
private $private_field;
static $static_field;
const CONSTANT = 0;
public function public_function() {...
Dependency Injection (DI) in the context of using a Dependency Injection Container (DIC) can be seen as a superset of constructor injection. A DIC will typically analyze a class constructor's typehints and resolve its needs, effectively injecting the dependencies needed for the instance execution.
...
If you want to add all the JARs in directory to the classpath, you can do this concisely using classpath wildcard syntax; for example:
someFolder/*
This tells the JVM to add all JAR and ZIP files in the someFolder directory to the classpath. This syntax can be used in a -cp argument, a CLASSPA...
The content mode property of a view tells how its content should be laid out. In the Interface Builder, the various modes can be selected in the Attributes Inspector.
Let's use two image views to see how the various modes work.
Scale to Fill
The image heights and widths are stretched to mat...
Create a new project
It can be just a Single View Application.
Add the code
Create a new Cocoa Touch Class file (File > New > File... > iOS > Cocoa Touch Class). Name it MyCollectionViewCell. This class will hold the outlets for the views that you add to your cell in the storyboard.
...
The following might have undefined behavior due to incorrect pointer alignment:
char *memory_block = calloc(sizeof(uint32_t) + 1, 1);
uint32_t *intptr = (uint32_t*)(memory_block + 1); /* possible undefined behavior */
uint32_t mvalue = *intptr;
The undefined behavior happens as the pointer...
for /r command can be used to recursively visit all the directories in a directory tree and perform a command.
@echo off
rem start at the top of the tree to visit and loop though each directory
for /r %%a in (.) do (
rem enter the directory
pushd %%a
echo In directory:
cd
rem leave...
The following uses a variable with a for loop to rename a group of files.
SetLocal EnableDelayedExpansion
for %%j in (*.*) do (
set filename=%%~nj
set filename=!filename:old=new!
set filename=Prefix !filename!
set filename=!filename! Suffix
ren "%%j" "!filename!%%~x...
$ git show dae86e1950b1277e545cee180551750029cfe735
$ git show dae86e19
You can specify revision (or in truth any object: tag, tree i.e. directory contents, blob i.e. file contents) using SHA-1 object name, either full 40-byte hexadecimal string, or a substring that is unique to the repository.
...
Time series data can be stored as a ts object. ts objects contain information about seasonal frequency that is used by ARIMA functions. It also allows for calling of elements in the series by date using the window command.
#Create a dummy dataset of 100 observations
x <- rnorm(100)
#Convert ...
