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Error: could not find function … in R

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How to change ProgressBar's progress indicator color in Android

...t="wrap_content" android:indeterminate="false" android:maxHeight="10dip" android:minHeight="10dip" android:progress="50" android:progressDrawable="@drawable/greenprogress" /> Then create a new drawable with something similar to the following (In this case greenprogress.xml):...
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Can you have if-then-else logic in SQL? [duplicate]

... 106 You can make the following sql query IF ((SELECT COUNT(*) FROM table1 WHERE project = 1) > ...
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How to design a product table for many kinds of product where each product has many parameters

...is overkill. Class Table Inheritance would be my first choice. Update 2019: The more I see people using JSON as a solution for the "many custom attributes" problem, the less I like that solution. It makes queries too complex, even when using special JSON functions to support them. It takes a lot...
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CSS background image to fit width, height should auto-scale in proportion

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Converting A String To Hexadecimal In Java

... 200 Here's a short way to convert it to hex: public String toHex(String arg) { return String.f...
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Why does git perform fast-forward merges by default?

...itched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop The --no-ff flag causes the merge to always create a new commit object, even if the merge could be ...
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Why does my application spend 24% of its life doing a null check?

... 180 The tree is massive By far the most expensive thing a processor ever does is not executing ...
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How to run a single test from a rails test suite?

... 160 NOTE: This doesn't run the test via rake. So any code you have in Rakefile will NOT get executed...
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How to get the day of week and the month of the year?

... answered Jan 27 '11 at 22:50 user113716user113716 291k5959 gold badges425425 silver badges431431 bronze badges ...