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Regular expression to allow spaces between words
...t prevents symbols and only allows letters and numbers. The regex below works great, but it doesn't allow for spaces between words.
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Regex replace uppercase with lowercase letters
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You may:
Find: (\w)
Replace With: \L$1
Or select the text, ctrl+K+L.
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Why is creating a Thread said to be expensive?
... expensive? What exactly is happening when a Java Thread is created that makes its creation expensive? I'm taking the statement as true, but I'm just interested in mechanics of Thread creation in JVM.
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Warning message: In `…` : invalid factor level, NA generated
...nch" was not a defined level. Use the stringsAsFactors = FALSE flag when making your data frame to force "Type" to be a character.
> fixed <- data.frame("Type" = character(3), "Amount" = numeric(3))
> str(fixed)
'data.frame': 3 obs. of 2 variables:
$ Type : Factor w/ 1 level "": NA 1 ...
Xcode Product -> Archive disabled
... anything. I went through the provisioning setup for the project and it looks ok.
4 Answers
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Condition within JOIN or WHERE
... the queries in the most readable way possible.
Sometimes this includes making the INNER JOIN relatively "incomplete" and putting some of the criteria in the WHERE simply to make the lists of filtering criteria more easily maintainable.
For example, instead of:
SELECT *
FROM Customers c
INNER JOI...
Is Big O(logn) log base e?
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community wiki
10 revsHeath Hunnicutt
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UILabel text margin [duplicate]
I'm looking to set the left inset/margin of a UILabel and can't find a method to do so. The label has a background set so just changing its origin won't do the trick. It would be ideal to inset the text by 10px or so on the left hand side.
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HTML5 check if audio is playing?
What's the javascript api for checking if an html5 audio element is currently playing?
9 Answers
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Function in JavaScript that can be called only once
...e executed only once, in each time after the first it won't be executed. I know from C++ and Java about static variables that can do the work but I would like to know if there is a more elegant way to do this?
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