大约有 40,000 项符合查询结果（耗时：0.0379秒） [XML]
Using R to list all files with a specified extension
...f.files <- files[-grep(".xml", files, fixed=T)]
First line just lists all files from working dir. Second one drops everything containing ".xml" (grep returns indices of such strings in 'files' vector; subsetting with negative indices removes corresponding entries from vector).
"fixed" argument ...
How do I get the find command to print out the file size with the file name?
...ust the h extra from jer.drab.org's reply. saves time converting to MB mentally ;)
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How do I set up email confirmation with Devise?
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1. Make sure you include confirmable in Model.devise call
class User < ActiveRecord::Base
devise :database_authenticatable, :confirmable ...
end
2. Make sure you add confirmable to the user migration
create_table :users do |t|
t.database_authenticatable
t.confirmabl...
Why does this method print 4?
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When we first get into main, the space left over is X-M. Each recursive call takes up R more memory. So for 1 recursive call (1 more than original), the memory use is M + R. Suppose that StackOverflowError is thrown after C successful recursive calls, that is, M + C * R <= X and M + C * (R + 1)...
What is Python buffer type for?
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
Python csv string to array
...hat it doesn't take into account of "string escaping," i.e. 3, "4,5,6, 6 shall be treated as three fields instead of five.
– Zz'Rot
Feb 9 '16 at 4:16
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WordPress asking for my FTP credentials to install plugins
I installed a WordPress blog in my local system. But when I try to add plugins from admin it asks for FTP access. What do I need to configure for WordPress to be able to upload without FTP?
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How to sync with a remote Git repository?
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Generally git pull is enough, but I'm not sure what layout you have chosen (or has github chosen for you).
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What are the most-used vim commands/keypresses?
...rouble wading through the gargantuan lists of things you can do in VIM and all of the keypresses for them. I'm tired of hearing "You can use 'I' for inserting text, or 'a' for appending text after the character, or 'A' for appending text at the end of the line, or…" I can't imagine everyone uses a...
How to scroll to an element inside a div?
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This was really helpful! If you want to set the scroll multiple times you need to offset by your current scroll location. Here's how I did it in jQuery: $('#scrolling_div').scrollTop($('#scrolling_div').scrollTop() + $('#element_within_...