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How to run cron job every 2 hours

How can I write a Crontab that will run my /home/username/test.sh script every 2 hours? 5 Answers ...
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php - get numeric index of associative array

I have an associative array and I need to find the numeric position of a key. I could loop through the array manually to find it, but is there a better way build into PHP? ...
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How can I generate random alphanumeric strings?

How can I generate a random 8 character alphanumeric string in C#? 33 Answers 33 ...
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How does a UILabel's minimumScaleFactor work?

I have used minimumFontSize before but that function is now deprecated and i don't quite understand how minimumScaleFactor works. ...
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What is the default value for enum variable?

An enum variable, anyone know if it is always defaulting to the first element? 2 Answers ...
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Most efficient way to reverse a numpy array

Believe it or not, after profiling my current code, the repetitive operation of numpy array reversion ate a giant chunk of the running time. What I have right now is the common view-based method: ...
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How do Trigonometric functions work?

So in high school math, and probably college, we are taught how to use trig functions, what they do, and what kinds of problems they solve. But they have always been presented to me as a black box. If you need the Sine or Cosine of something, you hit the sin or cos button on your calculator and you'...
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What's the best way to get the last element of an array without deleting it?

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Replacing column values in a pandas DataFrame

I'm trying to replace the values in one column of a dataframe. The column ('female') only contains the values 'female' and 'male'. ...
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Compute a confidence interval from sample data

I have sample data which I would like to compute a confidence interval for, assuming a normal distribution. 4 Answers ...