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How to check if a variable is set in Bash?
...a parameter expansion which evaluates to nothing if var is unset, and substitutes the string x otherwise.
Quotes Digression
Quotes can be omitted (so we can say ${var+x} instead of "${var+x}") because this syntax & usage guarantees this will only expand to something that does not require quote...
PadLeft function in T-SQL
...'t tested the syntax on the 2nd example. I'm not sure if that works 100% - it may require some tweaking - but it conveys the general idea of how to obtain your desired output.
EDIT
To address concerns listed in the comments...
@pkr298 - Yes STR does only work on numbers... The OP's field is an I...
Is there a way to cache GitHub credentials for pushing commits?
I recently switched to synchronizing my repositories to https:// on GitHub (due to firewall issues), and it asks for a password every time.
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How to Convert Boolean to String
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edited Oct 10 '19 at 22:47
Player1
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How do I make a list of data frames?
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This isn't related to your question, but you want to use = and not <- within the function call. If you use <-, you'll end up creating variables y1 and y2 in whatever environment you're working in:
d1 <- data.frame(y1 <- c(1, 2, 3), y2 <- c(4, 5, 6))
y1
# [1] 1 2 3
y2
# [1] 4 5 6
T...
implements Closeable or implements AutoCloseable
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It seems to me that you are not very familiar with interfaces. In the code you have posted, you don't need to implement AutoCloseable.
You only have to (or should) implement Closeable or AutoCloseable if you are about to imp...
Missing Push Notification Entitlement
I have an app for submission when it got rejected and I got the message
17 Answers
17
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requestFeature() must be called before adding content
I am trying to implement a custom titlebar:
8 Answers
8
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static linking only some libraries
... statically link only a some specific libraries to my binary when linking with GCC?
8 Answers
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How to insert a character in a string at a certain position?
I'm getting in an int with a 6 digit value. I want to display it as a String with a decimal point (.) at 2 digits from the end of int . I wanted to use a float but was suggested to use String for a better display output (instead of 1234.5 will be 1234.50 ). Therefore, I need a function t...