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add column to mysql table if it does not exist
My research and experiments haven't yielded an answer yet, so I am hoping for some help.
16 Answers
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Converting NumPy array into Python List structure?
...nvert a NumPy array to a Python List (for example [[1,2,3],[4,5,6]] ), and do it reasonably fast?
5 Answers
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PHP Foreach Pass by Reference: Last Element Duplicating? (Bug?)
...in the second loop, which does not call by reference, replaces that value, and thus $arr[2], with the new value.
So loop 1, the value and $arr[2] become $arr[0], which is 'foo'.
Loop 2, the value and $arr[2] become $arr[1], which is 'bar'.
Loop 3, the value and $arr[2] become $arr[2], which is 'bar'...
Finding local maxima/minima with Numpy in a 1D numpy array
...mum" varies vastly from use case to use case, so it's hard to provide a "standard" function for this purpose. Smoothing helps to take into account more than just the nearest neighbor. Using a different integer instead of 1, say 3, would be strange as it would only consider the third-next element i...
Can dplyr package be used for conditional mutating?
... TRUE ~ NA_real_))
Added - arithmetic/na_if If the values are numeric and the conditions (except for the default value of NA at the end) are mutually exclusive, as is the case in the question, then we can use an arithmetic expression such that each term is multiplied by the desired result using...
Maven Snapshot Repository vs Release Repository
What is the difference between a Snapshot Repository and Release Repository?
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Multidimensional Array [][] vs [,] [duplicate]
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One is an array of arrays, and one is a 2d array. The former can be jagged, the latter is uniform.
That is, a double[][] can validly be:
double[][] x = new double[5][];
x[0] = new double[10];
x[1] = new double[5];
x[2] = new double[3];
x[3] = new d...
How to remove gaps between subplots in matplotlib?
... gaps between the subplots. How do I remove the gaps between the subplots and make the image a tight grid?
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How to compare strings ignoring the case
I want apple and Apple comparison to be true .
Currently
5 Answers
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How do I restore a missing IIS Express SSL Certificate?
...fter setting up HTTPS in IIS Express, according to such articles as this and this , I am unable to actually load an IIS Express site using HTTPS. In Chrome , I am only getting:
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