system design tutorials
7 videos
This series of videos covers of the the most important concepts related to system design, with a focus on practical system design knowledge for interviews. These system design videos cover topics like vertical vs horizontal scaling, load balancers, database design and scaling, caching, back of the envelope math for estimating capacity requirements for a system, an introduction to distributed systems, and some system design interview style questions walking through a full design implementation
SPList list = mWeb.GetList(strUrl); if (list != null) { for (int i = list.ItemCount - 1; i >= 0; i--) { list.Items[i].Delete(); } list.Update(); }
public static void DeleteAllItems(string site, string list) { using (SPSite spSite = new SPSite(site)) { using (SPWeb spWeb = spSite.OpenWeb()) { StringBuilder deletebuilder = BatchCommand(spWeb.Lists[list]); spSite.RootWeb.ProcessBatchData(deletebuilder.ToString()); } } } private static StringBuilder BatchCommand(SPList spList) { StringBuilder deletebuilder= new StringBuilder(); deletebuilder.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?><Batch>"); string command = "<Method><SetList Scope=\"Request\">" + spList.ID + "</SetList><SetVar Name=\"ID\">{0}</SetVar><SetVar Name=\"Cmd\">Delete</SetVar></Method>"; foreach (SPListItem item in spList.Items) { deletebuilder.Append(string.Format(command, item.ID.ToString())); } deletebuilder.Append("</Batch>"); return deletebuilder; }
// We prepare a String.Format with a String.Format, this is why we have a {{0}} string command = String.Format("<Method><SetList Scope=\"Request\">{0}</SetList><SetVar Name=\"ID\">{{0}}</SetVar><SetVar Name=\"Cmd\">Delete</SetVar><SetVar Name=\"owsfileref\">{{1}}</SetVar></Method>", list.ID); // We get everything but we limit the result to 100 rows SPQuery q = new SPQuery(); q.RowLimit = 100; // While there's something left while (list.ItemCount > 0) { // We get the results SPListItemCollection coll = list.GetItems(q); StringBuilder sbDelete = new StringBuilder(); sbDelete.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?><Batch>"); Guid[] ids = new Guid[coll.Count]; for (int i=0;i<coll.Count;i++) { SPListItem item = coll[i]; sbDelete.Append(string.Format(command, item.ID.ToString(), item.File.ServerRelativeUrl)); ids[i] = item.UniqueId; } sbDelete.Append("</Batch>"); // We execute it web.ProcessBatchData(sbDelete.ToString()); //We remove items from recyclebin web.RecycleBin.Delete(ids); list.Update(); } }
- ایجاد متغیرها به سادگی با شروع نوشتن نام متغیر با $ و بدون تعریف نوع آنها انجام میشود
- write-host حکم write را دارد و واضح است که نوشتن تنهای آن برای ایجاد یک line break میباشد.
- کامنت کردن با #
- عدم وجود semi colon برای اتمام فرامین
[System.Reflection.Assembly]::Load("Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c") [System.Reflection.Assembly]::Load("Microsoft.SharePoint.Portal, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c") [System.Reflection.Assembly]::Load("Microsoft.SharePoint.Publishing, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c") [System.Reflection.Assembly]::Load("System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a") write-host # Enter your configuration here $siteUrl = "http://mysharepointsite.example.com/" $listName = "Name of my list" $batchSize = 1000 write-host "Opening web at $siteUrl..." $site = new-object Microsoft.SharePoint.SPSite($siteUrl) $web = $site.OpenWeb() write-host "Web is: $($web.Title)" $list = $web.Lists[$listName]; write-host "List is: $($list.Title)" while ($list.ItemCount -gt 0) { write-host "Item count: $($list.ItemCount)" $batch = "<?xml version=`"1.0`" encoding=`"UTF-8`"?><Batch>" $i = 0 foreach ($item in $list.Items) { $i++ write-host "`rProcessing ID: $($item.ID) ($i of $batchSize)" -nonewline $batch += "<Method><SetList Scope=`"Request`">$($list.ID)</SetList><SetVar Name=`"ID`">$($item.ID)</SetVar><SetVar Name=`"Cmd`">Delete</SetVar><SetVar Name=`"owsfileref`">$($item.File.ServerRelativeUrl)</SetVar></Method>" if ($i -ge $batchSize) { break } } $batch += "</Batch>" write-host write-host "Sending batch..." # We execute it $result = $web.ProcessBatchData($batch) write-host "Emptying Recycle Bin..." # We remove items from recyclebin $web.RecycleBin.DeleteAll() write-host $list.Update() } write-host "Done."
نحوه بروز رسانی برنامه های Blazor
در این ویدیوی آموزشی با نحوه و تکنیکهای لازم جهت بروز رسانی برنامههای Blazor آشنا میشوید. این بروز رسانی همه حالتهای برنامههای Blazor شامل:
-Blazor Server
-Blazor WebAssembly
-Blazor WebAssembly PWA رو شامل میشه. سورس کدهای این ویدیو هم در این آدرس در دسترس هست.
@{ var token = await HttpContext.GetTokenAsync("access_token"); } <component type="typeof(App)" render-mode="ServerPrerendered" param-AccessToken="token" />
<CascadingValue Name="AccessToken" Value="AccessToken"> <CascadingAuthenticationState> <Router AppAssembly="@typeof(Program).Assembly"> <Found Context="routeData"> <AuthorizeRouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" /> </Found> <NotFound> <LayoutView Layout="@typeof(MainLayout)"> <p>Sorry, there's nothing at this address.</p> </LayoutView> </NotFound> </Router> </CascadingAuthenticationState> </CascadingValue> @code{ [Parameter] public string AccessToken { get; set; } }
@page "/showtoken" <p>This is part of the access token @(AccessToken != null ? AccessToken.Substring(0,30) : "(null)")</p> @code { [CascadingParameter(Name = "AccessToken")] public string AccessToken { get; set; } }
var userName = await HttpContext.User.Identity.Name;
var khasCookie = HttpContext.Request.Cookies["khas"];
کتاب رایگان jQuery Trickshots
داستان پیدایش NET.
5 آنتی ویروس رایگان برای ویندوز
Hackers are smart and users are not being able to cope with their pace of evolution. The result is malware outbreaks we get to know about frequently. Windows is the most widely used OS on Pcs. That makes it the most widely targeted OS too. What is an average user’s (by average I mean not too technical) defense in such case? The anti malware programs. Of course, you have to pay a decent price for your PC to be secured from latest malware derivatives, but what’s better than to get the security for no cost?
وضعیت WebAssembly در 2021 و 2022
2021 was no exception and the following are some of the new areas where you’ll now find WebAssembly
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- The Disney+ Application Development Kit is using WebAssembly: https://medium.com/disney-streaming/introducing-the-disney-application-development-kit-adk-ad85ca139073
- A simplified version of Photoshop on the web was released: https://www.theverge.com/2021/10/26/22738125/adobe-photoshop-illustrator-web-announced
- Microsoft’s Flight Simulator has a WebAssembly-based plugin system: https://docs.flightsimulator.com/html/Programming_Tools/WASM/WebAssembly.htm