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Mastering Development

Do the multiple postfix-expression(subscripting) evaluations result in UB

#include <iostream> int main(){ int arr[7] = {0,1,2,3,4,3,2}; arr[0]++[arr]++[arr]++[arr]++[arr]++[arr]++[arr] = 5; //#1 for(auto i = 0;i<7;i++){ std::cout<<i<<" : "<< arr[i]<<std::endl; } } Consider the above code, Is this evaluation at #1 would result in UB? This is a example I have saw in twitter. According to the evaluation sequence for postfix ++: expr.post.incr#1 The value […]

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User Help

My Batch script cannot match the cover JPG images when muxing files into a MKV

I wrote the code and I want to use it for my archive. Thanks for helping me improve it. The folders containing the files are as follows (ex.): Got folder /S01, /s02, /s0n… /S01/01.mkv, 02.mkv,…, cover.jpg /S02/01.mkv, 02.mkv,…, cover.jpg In each subfolder there is a file named cover.jpg that I want to attach to all […]

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User Help

Mux files to mkv

I wrote the code and I want to use it for my archive. Thanks for helping me improve it. The folders containing the files are as follows (ex.): Got/S01, s02 ,… /S01/01.mkv, 02.mkv,…, cover.jpg /S02/01.mkv, 02.mkv,…, cover.jpg … In each subfolder there is a file named cover.jpg that I want to attach to all the […]

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Ask Geographic Information System (GIS)

Create point geometry in PostGIS from a X Y Z M coordinate format

I would like to get a PostGIS point table from a PostGreSQL table containing OpenDataKit data where the coordinates are contained into in a column in a X Y Z M format (M being I think the value of the GPS precision in meters). E.g: 10.384643333333335 -23.214940000000002 -0.8 5.0 My first question is: what should […]

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Ask Geographic Information System (GIS)

Create point geometry in PostGIS from a X Y Z M coordinate format

I would like to get a PostGIS point table from a PostGreSQL table containing OpenDataKit data where the coordinates are contained into in a column in a X Y Z M format (M being I think the value of the GPS precision in meters). E.g: 10.384643333333335 -23.214940000000002 -0.8 5.0 My first question is: what should […]

Categories
Ask Geographic Information System (GIS)

Create point geometry in PostGIS from a X Y Z M coordinate format

I would like to get a PostGIS point table from a PostGreSQL table containing OpenDataKit data where the coordinates are contained into in a column in a X Y Z M format (M being I think the value of the GPS precision in meters). E.g: 10.384643333333335 -23.214940000000002 -0.8 5.0 My first question is: what should […]

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Mastering Development

What is the best algo for this array minimization problem?

I have an array say ‘A’ of size n having some numbers {a1, a2, …, an} not necessarily distinct. I have to create another array B = {b1, b2, …, bn} which are distinct such that the value of sum|ai – bi| over all i’s{i =1 to i =n} is minimized. Basically I want to […]

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Mastering Development

Ways of using(assigning) variables in Sage

I need to test an n-variable Boolean Function f = f(x0,…,xn-1). I need to fix x0, then run some tests for the g1 = f(x1,…,xn-1), then fix x1 and so on. The problem is that I don’t really understand how to do it with Sage. At first, I tried to create a vector of values, […]

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Mastering Development

Perfect information game – action function

i can’t uderstand the activation function in the perfect-information game definition given by the book i’m studying on. ================================================================================================ A (finite) perfect-information game (in extensive form) is a tuple G=(N, A, H, Z, χ, ρ, σ, u) where: N is a set of n players A is a (single) set of actions Z is a […]

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Mastering Development

Boolean Labels Training with Keras causes the error “Please provide data which shares the same first dimension”

So, here is what I am trying to do. My model has to receive a number of training samples, each a conjunction of Boolean literals (i.e. a vector of 0 or 1s) assigned with a truth value. Learning from the samples, it must be able to receive some test vector and determine its truth value. […]