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How can I copy data from one column to another in the same table?
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This will also work if you want to transfer old value to other column and update the first one: UPDATE table SET columnA = 'new value', columnB = columnA. Like other answer says - don't forget the WHERE clause to update only what's needed.
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How to determine the screen width in terms of dp or dip at runtime in Android?
...the layout of the android widgets using dip/dp (in java files). At runtime if I code,
int pixel=this.getWindowManager().getDefaultDisplay().getWidth() ;
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Reference: Comparing PHP's print and echo
What is the difference between PHP's print and echo ?
1 Answer
1
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Random Gaussian Variables
...ution. A simple implementation:
Random rand = new Random(); //reuse this if you are generating many
double u1 = 1.0-rand.NextDouble(); //uniform(0,1] random doubles
double u2 = 1.0-rand.NextDouble();
double randStdNormal = Math.Sqrt(-2.0 * Math.Log(u1)) *
Math.Sin(2.0 * Math.PI * u2);...
Ruby equivalent of virtualenv?
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RVM works closer to how virtualenv works since it lets you sandbox different ruby versions and their gems, etc.
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How to retrieve a user environment variable in CMake (Windows)
...--unset=NAME]... [NAME=VALUE]... COMMAND [ARG]...
Run command in a modified environment.
Just be aware that this may only work the first time. If CMake re-configures with one of the consecutive builds (you just call e.g. make, one CMakeLists.txt was changed and CMake runs through the genera...
Truncate a list to a given number of elements
...}
}
You should bear in mind that subList returns a view of the items, so if you want the rest of the list to be eligible for garbage collection, you should copy the items you want to a new List:
List<String> subItems = new ArrayList<String>(items.subList(0, 2));
If the list is short...
PHP and MySQL - how to avoid password in source code? [duplicate]
...stead of the contents) or b) Move it outside of your web served directory. If somebody can see your configuration file, it's worse than having it in your source code.
It's also going to be a good idea to have a base (empty / default) version of the configuration file, and separate it out per enviro...
jQuery: fire click() before blur() event
... $(document).on('blur', "#myinput", hideResult); //rebind the handler if needed
});
function hideResult() {
$("#myresults").hide();
}
FIDDLE
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Safe integer parsing in Ruby
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This might work:
i.to_i if i.match(/^\d+$/)
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