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ERROR 1130 (HY000): Host '' is not allowed to connect to this MySQL server [duplicate]

...vileges: CREATE USER 'root'@'ip_address' IDENTIFIED BY 'some_pass'; GRANT ALL PRIVILEGES ON *.* TO 'root'@'ip_address'; If you see %, well then, there's another problem altogether as that is "any remote source". If however you do want any/all systems to connect via root, use the % wildcard to gra...
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What are C++ functors and their uses?

...42); // create an instance of the functor class int i = add42(8); // and "call" it assert(i == 50); // and it added 42 to its argument std::vector<int> in; // assume this contains a bunch of values) std::vector<int> out(in.size()); // Pass a functor to std::transform, which calls the fu...
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How to implement a binary tree?

...ice implementation. I'm just here to point out some style stuff. python usually does node is not None instead of your (node!=None). Also, you can use the __str__ function instead of the printTree method. – Jeff Mandell Oct 18 '15 at 2:30 ...
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How to call asynchronous method from synchronous method in C#?

I have a public async void Foo() method that I want to call from synchronous method. So far all I have seen from MSDN documentation is calling async methods via async methods, but my whole program is not built with async methods. ...
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overlay two images in android to set an imageview

...XML then simply set the image, or you can configure a LayerDrawable dynamically in code. Solution #1 (via XML): Create a new Drawable XML file, let's call it layer.xml: <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@drawable/t" /> ...
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How do I implement interfaces in python?

...interface, a module that is a part of the Zope Component Architecture, a really awesomely cool component framework. Here you don't subclass from the interfaces, but instead mark classes (or even instances) as implementing an interface. This can also be used to look up components from a component reg...
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DirectX SDK (June 2010) Installation Problems: Error Code S1023

I seem to be having some problems installing the DirectX SDK. Everything seems to be going well during the install, but at the end I get the message: ...
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What does “hashable” mean in Python?

...y and a set member, because these data structures use the hash value internally. All of Python’s immutable built-in objects are hashable, while no mutable containers (such as lists or dictionaries) are. Objects which are instances of user-defined classes are hashable by default; they all comp...
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ValueError: setting an array element with a sequence

...nces : example : import tensorflow as tf input_x = tf.placeholder(tf.int32,[None,None]) word_embedding = tf.get_variable('embeddin',shape=[len(vocab_),110],dtype=tf.float32,initializer=tf.random_uniform_initializer(-0.01,0.01)) embedding_look=tf.nn.embedding_lookup(word_embedding,input_x) wi...
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“Private” (implementation) class in Python

I am coding a small Python module composed of two parts: 7 Answers 7 ...