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How to implement a unique index on two columns in rails
I have a table and I'm trying to add a unique index on two columns. Those columns are also indexed. So my question is if I just can remove the indexes who were just for one column or if I have to use all three indexes:
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Auto Scale TextView Text to Fit within Bounds
I'm looking for an optimal way to resize wrapping text in a TextView so that it will fit within its getHeight and getWidth bounds. I'm not simply looking for a way to wrap the text- I want to make sure it both wraps and is small enough to fit entirely on the screen.
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How can I replace a newline (\n) using sed?
How can I replace a newline (" \n ") with a space (" ") using the sed command?
42 Answers
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How to add a border just on the top side of a UIView
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I consider subclassing UIView and overriding drawRect overkill here. Why not add an extension on UIView and add border subviews?
@discardableResult
func addBorders(edges: UIRectEdge,
color: UIColor,
inset: CGFlo...
How can I parse a local JSON file from assets folder into a ListView?
I'm currently developing a physics app that is supposed to show a list of formulas and even solve some of them (the only problem is the ListView )
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How to merge two files line by line in Bash
I have two text files, each of them contains an information by line such like that
4 Answers
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Raise warning in Python without interrupting program
I am trying to raise a Warning in Python without making the program crash / stop / interrupt.
3 Answers
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Git update submodules recursively
...it submodule update --recursive
You will also probably want to use the --init option which will make it initialize any uninitialized submodules:
git submodule update --init --recursive
Note: in some older versions of Git, if you use the --init option, already-initialized submodules may not be u...
How Do You Clear The IRB Console?
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On Mac OS X or Linux you can use Ctrl + L to clear the IRB screen.
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Javascript roundoff number to nearest 0.5
...ow can i round off a number to the nearest 0.5.
I have to scale elements in a web page according to screen resolution and for that i can only assign font size in pts to 1, 1.5 or 2 and onwards etc.
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