Magento2: How do I load a category collection?

I need to load the category collection and display it in the top menu item on my Magento site. I've tried the Object Manager concept, but it's not the right method to follow, so I need to load it using dependency injection.

I referenced this, but I do not know where to use it and how to show it on the frontend since I'm new to Magento.

Can someone help me please?

App Windows – Adobe Master Collection CC 2019 (x64) (September 2019) Multilingual | NulledTeam UnderGround

Adobe Master Collection CC 2019 (x64) (September 2019) Multilanguage Pre-Enabled | 17.8 Gb

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And now you have all the apps and resources, including new Adobe Stock images, always at hand, right where they're being deployed. With Adobe CreativeSync technology, everything is perfectly connected, so you can easily turn your best ideas into your best projects on desktops and mobile devices. DO IT. CREATIVE CLOUD.
Adobe After Effects 2019 v16.1.3.5
Adobe Animate 2019 v19.2.1.408
Adobe Audition 2019 v12.1.4.5
Adobe Bridge 2019 v9.1.0.338
Adobe Character Animator 2019 v2.1.1.7
Adobe Dimension v2.3.1.1060
Adobe Dreamweaver 2019 v19.2.1.11281
Adobe Illustrator 2019 v23.1.0.670
Adobe InCopy 2019 v14.0.2.324
Adobe InDesign 2019 v14.0.3.433
Adobe Lightroom Classic v8.4.1
Adobe Media Encoder 2019 v13.1.5.35
Adobe Photoshop 2019 v20.0.6.80
Adobe Prelude 2019 v8.1.1.39
Adobe Premiere Pro 2019 v13.1.5.47
Adobe XD v22.5.12
Adobe Premiere Rush CC
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– Windows 10
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– 6 GB of free hard disk space for installation; additional free space required during installation
– Additional hard disk cache space (10 GB recommended)
– 1440×900 display
– OpenGL 2.0-enabled system
– QuickTime 7.6.6 software required for QuickTime features
– Optional: Adobe certified GPU card for GPU-accelerated 3D renderer with raytracing
– Internet connection and registration are required to activate the software, validate the subscriptions, and access online services.



redirect – Apache redirectmatch collection groups are not properly routed to the destination

I'm trying to redirect requests to my old Git server (with my old username) to the new server (with my new username).

I try to set the following conditions:

  1. If the URL is http (s): //, forward it to

  2. If the URL is http (s): //, redirect it to

  3. Otherwise forward all http (s): // to

I am trying to use Apache2 RedirectMatch to do this using collection groups. I have the following virtual host configuration:

    RedirectMatch 301 /glmdev/(.*)$1
    Redirect /glmdev/
    Redirect /

    SSLEngine on
    SSLCertificateFile /etc/glmdev/ssl/_star/cert.crt
    SSLCertificateKeyFile /etc/glmdev/ssl/_star/cert.key
    SSLCertificateChainFile /etc/glmdev/ssl/_star/ca.crt
    RedirectMatch 301 /glmdev/(.*)$1
    Redirect /glmdev/
    Redirect /

Conditions 2 and 3 work as expected, but navigate to some http (s): // and redirect to

Not sure why the collection group is not found or appended to the URL. Every help is appreciated. Thank you in advance.

magento2 – How can I remove orders from an order collection in Magento 2? Or how do you generally remove items from a collection?

I use this code in a block to get a collection of orders in Magento 2:

$orders = $this->orderCollectionFactory->create()->addFieldToSelect(

And as far as it goes, I can go through the orders and spend the order data in the frontend.

However, I would like to remove some orders from this collection, for example an order with ID 21. I tried to use them removeItemByKey to achieve that:

foreach ($orders as $order) {
if($order->getId() == 21) $orders->removeItemByKey($order->getId());

However, this does not work and the order with the ID 21 remains in the order collection.

I tried it instead:

foreach ($orders as $order) {
if($order->getId() == 21) unset($orders->{$order->getId()});

Same result, order 21 still in the collection.

Why does not work and how can I remove data from the order collection?

Unit – How to ensure that at least one item in a collection has a specific value?

Just use a Boolean value to see if you've ever assigned a value of up. If not, enter a value of "up" anywhere in your collection.

private void AssignRandomDirection()
    // No need for this to be a list, since you never add/remove elements.
    var directions = new Vector2()

    boolHasAssignedUp = false;

    var agents =  FindObjectsOfType();

    foreach (var agent in agents)
        var random = Random.Range(0, directions.Length);
        hasAssignedUp |= (random == 0);
        agent.direction = directions(random);

    if(hasAssignedUp == false)
        agents(Random.Range(0, agents.Length)).direction = directions(0);

magento2 – how to filter magento 2 collection with & # 39; or & # 39 ;, & # 39; and & # 39; combination?

For example, the search query is "Samsung LCD". It may match the product name or item number.

I have product names below. xyz lcd. lcd pack. mobile

4.screen lcd.

so if i filter i just need to get it xyz lcd. lcd pack.

but now I get all the above product names.
Could you please help me with this?

$term = $this->getRequest()->getParam('term');
$termArr = explode(' ', $term);
$search = array();
$search() = array('attribute' => 'sku', 'like' => '%' . $term . '%');
$search() = array('attribute' => 'name', 'like' => '%' . $term . '%');
        foreach ($termArr as $termc) {
            $search() = array(
                'attribute' => 'name', 'like' => '%' . $termc . '%');
            $search() = array(
                'attribute' => 'sku', 'like' => '%' . $termc . '%');

  $objectManager = MagentoFrameworkAppObjectManager::getInstance();
        $collection = $objectManager->create('MagentoCatalogModelResourceModelProductCollectionFactory')->create();

Algorithms – Truss Tree Collection Knot Combinations

Summary: I have a tree that contains car parts, from which I have to put together all valid combinations of these parts.

Parts may be required – each build must contain them.

Parts can be optional.

Parts may conflict with other parts.

Parts may include optional parts.

Example tree:

| - Motor (required)
| - - V8
| - - V12
| - - - Colour (optional)
| - - - - Black
| - - - - Chrome
| - Transmission (required)
| - - Mechanical
| - - Automatic
| - Wheels (optional)
| - - Basic
| - - Fancy
| - - - Colour (optional)
| - - - - Red
| - - - - Blue
| - BodyStyle (optional)
| - - Hatchback (conflicts with Motor.V12)
| - - Buggy (conflicts with Motor.V8)

Valid builds for this tree:

Car | Motor.V8 | Transmission.Automatic
Car | Motor.V8 | Transmission.Automatic | Wheels.Basic
Car | Motor.V12.Colour.Black | Transmission.Automatic | Wheels.Basic
Car | Motor.V8 | Transmission.Automatic | BodyStyle.Hatchback
Car | Motor.V12 | Transmission.Mechanical | Wheels.Fancy | BodyStyle.Buggy
Car | Motor.V12 | Transmission.Mechanical | Wheels.Fancy.Colour.Red | BodyStyle.Buggy

What algorithm should I look for to solve this task?

python – How to draw a collection of polygons (stl file) correctly?

I have STL file and NumPy STL library. Especially, have mesh size .x, .y, .z Properties that can be drawn

my_mesh = mesh.Mesh.from_file(file)
x = my_mesh.x
y = my_mesh.y
z = my_mesh.z
mlab.points3d(x, y, z)

The result is slow and visually pretty bad

Also have stitches vectors Property, but I have no idea how to work with it.
In matplotlib I can use:

figure = plt.figure()
axes = mplot3d.Axes3D(figure)

The result is working property, but terribly slow and pretty useless.

Are there better ways to plan this?

Sharepoint Server – Last modified date for the site collection

What exactly do you mean by "access"? If you want to know when the last content of a website was viewed Then you may be able to retrieve this from the standard usage reports.

For each child site, go to the "View usage reports" page, for example:

(To view site collection reports, change the setting Category Parameters AnalyticsSiteCollection.)

Depending on how many websites you have, finding a programmatic way to do so may be more efficient. You can also install a JS tracker script on your master page that creates a new list item as soon as the page loads (here is an example of such a script). Or use Google Analytics, which is free but raises security concerns. This will give you a very clear picture of how often users access each site over time.

EDIT: To check if list items (for example) existed in a particular site collection Changed Since a certain date, we can do a KQL query that specifies the content type and date range, and then see how many results we get. (Of course, this works only if all site collections are indexed by the search service.)

If we get 0 results for a query such as "List Items whose modification date is after 1/1/18", we can reasonably say that the lists on the site have not changed since 1/1/18. Then we can wrap this in a loop to do the same check on each site collection:

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

(String)$lastDate = "1/1/2018"

foreach($sc in $webapplication | Get-SPSite -Limit All)
    Write-Host $sc.Url -ForegroundColor Yellow

    $keywordQuery = New-Object Microsoft.Office.Server.Search.Query.KeywordQuery($sc)
    $keywordQuery.QueryText = "ContentClass:STS_ListItem AND LastModifiedTime>=$($lastDate) AND site:$($sc.Url)"
    $keywordQuery.RowLimit = 5;
    $searchExec = New-Object Microsoft.Office.Server.Search.Query.SearchExecutor
    $searchResults = $searchExec.ExecuteQuery($keywordQuery)

    If( 0 -eq $searchResults.Table.Count ){
        Write-Host "`tSite Collection $($sc.Url) is old" -ForegroundColor Red


spfx Web Parts – SP 2010 Site Collection Migration to SP 2013 On-Prem to SP 2016 On-Prem to SP 2019 On-Prem | Transition from classical to modern pages

I'm new to an organization that is moving from SP 2010 to SP 2013 to SP 2016 to SP 2019. These are all on-premise versions. The site collection includes nearly 3,500 websites. There are many customizations – Web Parts, which contain more content editors that reference both jquery and html files.

For testing, a team has upgraded from SP 2010 to SP 2013. It has not broken anything yet. I'm worried if they are migrating to SP 2016 and the modern pages are enabled – the content editor web part does not exist on modern pages – SPFx rules. What happens on the pages where Content Editor Web Parts were used to reference files? Is there a best practices document?