Imagine that you need to load JAR file dynamically in Zeppelin working on your EMR cluster. One easy way is to deploy the file to the instance and load it from there, however, what can you do if you have almost no access…
If you want to declare a class in Zeppelin and create instance of it, you might be surprised: class K defined class K classOf[K].newInstance() java.lang.InstantiationException: K at java.lang.Class.newInstance(Class.java:427) … 52 elided Caused by: java.lang.NoSuchMethodException: K.() at java.lang.Class.getConstructor0(Class.java:3082) at java.lang.Class.newInstance(Class.java:412) … 52 more What…
This is the fiftieth part of the ILP series. For your convenience you can find other parts in the table of contents in Part 1 – Boolean algebra Today we are going to solve three graph problems: vinimum spanning tree, vertex cover and…
This is the eighth part of the Custom memory allocation series. For your convenience you can find other parts in the table of contents in Part 1 — Allocating object on a stack Today we are going to revisit an Unsafe list example…
Can one line of code in C# JIT compile into two different blocks of code in the same program? This sounds a little tricky but in fact is very easy and happens pretty often. Consider the following code: using System; namespace Reordering {…
This is the seventh part of the Custom memory allocation series. For your convenience you can find other parts in the table of contents in Part 1 — Allocating object on a stack We know how to allocate object on a stack, however,…
This is the sixth part of the Concurrency series. For your convenience you can find other parts in the table of contents in Part 1 – Mutex performance in .NET Let’s start with the following code: using System; using System.Threading; namespace AbandonedMutex {…
This is the fifth part of the Concurrency series. For your convenience you can find other parts in the table of contents in Part 1 – Mutex performance in .NET Last time we called WinAPI through P/Invoke, today we are going to call…
This is the fourth part of the Concurrency series. For your convenience you can find other parts in the table of contents in Part 1 – Mutex performance in .NET We have already seen a mutex in C# but last time it happened…
This is the third part of the Concurrency series. For your convenience you can find other parts in the table of contents in Part 1 – Mutex performance in .NET Last time we saw file lock in Java which we can use on…
This is the second part of the Concurrency series. For your convenience you can find other parts in the table of contents in Part 1 – Mutex performance in .NET Today we explore system-wide lock in Java 1.8.0_161 on Windows 10 x64. There…
This is the first part of the Concurrency series. For your convenience you can find other parts using the links below: Part 1 — Mutex performance in .NET Part 2 — Java file lock Part 3 — Java mutex via JNI Part 4…
This is the forty ninth part of the ILP series. For your convenience you can find other parts in the table of contents in Part 1 – Boolean algebra Today we solve the task B from Deadline24 2018 edition. Sewage system Introduction Beetlejumpers…
This is the forty eighth part of the ILP series. For your convenience you can find other parts in the table of contents in Part 1 – Boolean algebra You are given board with thirty rows and fifteen columns. For each cell you…
This is the eighth part of the .NET Inside Out series. For your convenience you can find other parts in the table of contents in Part 1 – Virtual and non-virtual calls in C# If you are interested in the topic see the…
This is the seventh part of the DLL Injection series. For your convenience you can find other parts in the table of contents in Part 1 – Registry We already injected native code into target, managed code into default application domain, and managed…
This is the seventh part of the .NET Inside Out series. For your convenience you can find other parts in the table of contents in Part 1 – Virtual and non-virtual calls in C# In Capturing thread creation to catch exceptions we generated…
In ADO.NET there is a hard-coded system-wide limit for transaction set to 10 minutes. You cannot change it just like that in your web.config or App.config. You can change it in machine.config though. First, where are the machine configs? For 32 Bits: C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\machie.config…
Another post with little script: Set o = CreateObject(“MSXML2.XMLHTTP”) o.open “GET”, “https://page.com”, False o.setRequestHeader “Header”, “Header value” ‘ Ignore certs (I bet you want to know how to do it) ‘ 2 stands for SXH_OPTION_IGNORE_SERVER_SSL_CERT_ERROR_FLAGS ‘ 13056 means ignore all server side cert…
Well, here it is: Function IsWorkstationLocked( computer ) Dim wmi : Set wmi = GetObject(“winmgmts://” & computer & “/root/cimv2”) Dim logonScreenCount : logonScreenCount = wmi.ExecQuery (“SELECT * FROM Win32_Process WHERE Name = ‘LogonUI.exe'”).Count IsWorkstationLocked = (logonScreenCount > 0) End Function Dim o If…
Posts
- Dynamically loading JAR file in Zeppelin July 14, 2018
- Generating class in Zeppelin July 7, 2018
- ILP Part 50 — MST, vertex cover and edge cover June 30, 2018