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Writing outputs to log file and console

In Unix shell, I have a env file ( env file defines the parameters required for running the user script like log file name and path, redirect outputs and errors to log file, database connection details, etc ) which redirects all the outputs ( echo messages ) and errors to the log file from the execu...
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How to check if field is null or empty in MySQL?

I am trying to figure out how to check if a field is NULL or empty . I have this: 7 Answers ...
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Python unittest - opposite of assertRaises?

I want to write a test to establish that an Exception is not raised in a given circumstance. 10 Answers ...
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When are you supposed to use escape instead of encodeURI / encodeURIComponent?

When encoding a query string to be sent to a web server - when do you use escape() and when do you use encodeURI() or encodeURIComponent() : ...
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Hidden Features of VB.NET?

I have learned quite a bit browsing through Hidden Features of C# and was surprised when I couldn't find something similar for VB.NET. ...
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how to bypass Access-Control-Allow-Origin?

I'm doing a ajax call to my own server on a platform which they set prevent these ajax calls (but I need it to fetch the data from my server to display retrieved data from my server's database). My ajax script is working , it can send the data over to my server's php script to allow it to process. H...
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Set cache-control for entire S3 bucket automatically (using bucket policies?)

I need to set cache-control headers for an entire s3 bucket, both existing and future files and was hoping to do it in a bucket policy. I know I can edit the existing ones and I know how to specify them on put if I upload them myself but unfortunately the app that uploads them cannot set the header...
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How can I programmatically get the MAC address of an iphone

How to programmatically get an iPhone's MAC address and IP address? 12 Answers 12 ...
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What does %~dp0 mean, and how does it work?

I find %~dp0 very useful, and I use it a lot to make my batch files more portable. 7 Answers ...
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How to do exponential and logarithmic curve fitting in Python? I found only polynomial fitting

I have a set of data and I want to compare which line describes it best (polynomials of different orders, exponential or logarithmic). ...