Emulator: ERROR: x86 emulation currently requires hardware acceleration

As per this response, the complete steps are: 1) Open SDK Manager (In Android Studio, go to Tools > Android > SDK Manager) and Download Intel x86 Emulator Accelerator (HAXM installer) if you haven’t. 2) Now go to your SDK directory C:\users\%USERNAME%\AppData\Local\Android\sdk\extras\intel\Hardware_Accelerated_Execution_Manager\ and run the file named intelhaxm-android.exe. In case you get an error like “Intel virtualization technology (vt,vt-x) … Read more

How do I generate a random int number?

The Random class is used to create random numbers. (Pseudo-random that is of course.). Example: If you are going to create more than one random number, you should keep the Random instance and reuse it. If you create new instances too close in time, they will produce the same series of random numbers as the random generator is seeded from … Read more

How to dynamically allocate arrays in C++

for arrays (which is what you want) or for single elements. But it’s more simple to use vector, or use smartpointers, then you don’t have to worry about memory management. L.data() gives you access to the int[] array buffer and you can L.resize() the vector later. L.get() gives you a pointer to the int[] array.

Which is the difference between Long.valueOf(0) and 0L in Java?

Nothing. will undergo autoboxing. The compiler replaces it with: You can see this if you decompile your class, e.g. using javap. Decompiles to: So how it is better initialize a variable, considering memory consumption and time complexity? Because they are semantically identical, the memory consumption and time complexity is also identical. Instead, focus on what is actually … Read more

How to merge branch to master?

If you want to merge your branch to master on remote, follow the below steps: push your branch say ‘br-1’ to remote using git push origin br-1. switch to master branch on your local repository using git checkout master. update local master with remote master using git pull origin master. merge br-1 into local master using git merge br-1. … Read more

What does (~0L) mean?

0L is a long integer value with all the bits set to zero – that’s generally the definition of 0. The ~ means to invert all the bits, which leaves you with a long integer with all the bits set to one. In two’s complement arithmetic (which is almost universal) a signed value with all bits set to one is -1. The reason for … Read more

What does href expression do?

An <a> element is invalid HTML unless it has either an href or name attribute. If you want it to render correctly as a link (ie underlined, hand pointer, etc), then it will only do so if it has a href attribute. Code like this is therefore sometimes used as a way of making a link, but without having to provide an actual … Read more

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