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Table name as variable
...swering the question for readers in the future, not just the person asking now. Please edit your answer to add explanations and give an indication of what limitations and assumptions apply. From Review
– double-beep
May 20 at 11:04
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Max length for client ip address [duplicate]
... a database column storing client ip addresses? I have it set to 16 right now, but could I get an ip address that is longer than that with IPv6, etc?
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check if jquery has been loaded, then load it if false
Does anyone know how to check if jquery has been loaded (with javascript) then load it if it hasnt been loaded.
10 Answers
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System.currentTimeMillis vs System.nanoTime
What I would like to know is whether I should use System.currentTimeMillis() or System.nanoTime() when updating my object's positions in my game? Their change in movement is directly proportional to the elapsed time since the last call and I want to be as precise as possible.
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Nullable Foreign Key bad practice?
Let's say you have a table Orders with a foreign key to a Customer Id. Now, suppose you want to add an Order without a Customer Id, (whether that should be possible is another question) you would have to make the foreign key NULL... Is that bad practice or would you rather work with a link table bet...
Access multiple elements of list knowing their index
I need to choose some elements from the given list, knowing their index. Let say I would like to create a new list, which contains element with index 1, 2, 5, from given list [-2, 1, 5, 3, 8, 5, 6]. What I did is:
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MySQL show status - active or total connections?
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This is the total number of connections to the server till now.
To find current conection status you can use
mysqladmin -u -p extended-status | grep -wi
'threads_connected\|threads_running' | awk '{ print $2,$4}'
This will show you:
Threads_connected 12
Threads_running 1 ...
Fixed page header overlaps in-page anchors
... Tested this on the latest Firefox (55.0.3 on PC) and it works now. :-)
– RachieVee
Oct 4 '17 at 16:13
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nodejs vs node on ubuntu 12.04
...odejs)
It's quite simple:
Install a nodejs version:
$ nvm install 4.4
Now you have nodejs 4.4 in addition to the version that was already installed and you can just use the node command to reach the newly installed version:
$ node -v // The new version added by nvm.
v4.4.5
$ nodejs -v // T...
Extract month and year from a zoo::yearmon object
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I know the OP is using zoo here, but I found this thread googling for a standard ts solution for the same problem. So I thought I'd add a zoo-free answer for ts as well.
# create an example Date
date_1 <- as.Date("1990-01-...