How to get ndk-gdb working on Android?

You don’t need to use -O0 or -g switches. You need to do one of following: put android:debuggable=”true” to the <application> tag in AndroidManifest.xml file use NDK_DEBUG=1 after ndk-build put APP_OPTIM := debug in Application.mk file Doing anyone of these three things will automatically use -O0 and -g switches. Can you try running gdb manually, … Read more

in java what does the @ symbol mean?

The @ symbol denotes a Java Annotation. What a Java annotation does, is that it adds a special attribute to the variable, method, class, interface, or other language elements. (This can be configured when you declare the annotation) When you add an annotation to something, other parts of the program can check whether something has … Read more

Reference Guide: What does this symbol mean in PHP? (PHP Syntax)

Incrementing / Decrementing Operators ++ increment operator — decrement operator Example Name Effect ——————————————————————— ++$a Pre-increment Increments $a by one, then returns $a. $a++ Post-increment Returns $a, then increments $a by one. –$a Pre-decrement Decrements $a by one, then returns $a. $a– Post-decrement Returns $a, then decrements $a by one. These can go before or … Read more

What’s the difference between a string and a symbol in Ruby?

The main difference is that multiple symbols representing a single value are identical whereas this is not true with strings. For example: irb(main):007:0> :test.object_id => 83618 irb(main):008:0> :test.object_id => 83618 irb(main):009:0> :test.object_id => 83618 Those are three references to the symbol :test, which are all the same object. irb(main):010:0> “test”.object_id => -605770378 irb(main):011:0> “test”.object_id => … Read more