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How can I pass command-line arguments to a Perl program?
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190
Depends on what you want to do. If you want to use the two arguments as input files, you can jus...
Speed up the loop operation in R
... accumulates something. (simple operation). The data.frame has roughly 850K rows. My PC is still working (about 10h now) and I have no idea about the runtime.
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Inner text shadow with CSS
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105
Here's a little trick I discovered using the :before and :after pseudo-elements:
.depth {
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The quest for the Excel custom function tooltip
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40
+25
I've post...
How to configure an existing git repo to be shared by a UNIX group
...Boyd Smith
14.6k2323 gold badges9999 silver badges150150 bronze badges
answered Jul 13 '10 at 23:34
David UnderhillDavid Underhill
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Twitter Bootstrap - how to center elements horizontally or vertically
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Update: while this answer was likely correct back in early 2013, it should not be used anymore. The proper solution uses offsets.
As for other users suggestion there are also native bootstrap classes available like:
class="text-center"
class="pagination-centered"
thanks to @Henn...
Difference between this and self in JavaScript
...ll({}); // true false false
You can find window.self defined in the W3C 2006 working draft for the Window Object here.
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What's the best way of structuring data on firebase?
...No biggie if none of those things number in thousands. But a big deal for 10k users with upwards of 5k messages each.
So now the optimal strategy for a hierarchical, real-time structure becomes more obvious:
/user_meta/uid/email
/messages/uid/...
/widgets/uid/...
An additional tool which is extr...
Test if remote TCP port is open from a shell script
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460
As pointed by B. Rhodes, nc (netcat) will do the job. A more compact way to use it:
nc -z <ho...
How to keep one variable constant with other one changing with row in excel
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Use this form:
=(B0+4)/$A$0
The $ tells excel not to adjust that address while pasting the formula into new cells.
Since you are dragging across rows, you really only need to freeze the row part:
=(B0+4)/A$0
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