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MySQL pagination without double-querying?
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No, that's how many applications that want to paginate have to do it. It's reliable and bullet-proof, albeit it makes the query twice. But you can cache the count for a few seconds and that will help a lot.
The other way is to use SQL_CALC_FOUND_ROWS clause and then call SELECT FOUND_RO...
Batch script loop
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for /l is your friend:
for /l %x in (1, 1, 100) do echo %x
Starts at 1, steps by one, and finishes at 100.
Use two %s if it's in a batch file
for /l %%x in (1, 1, 100) do echo %%x
(which is one of the things I really really hate about windows scripting)
If you have ...
How do I completely uninstall Node.js, and reinstall from beginning (Mac OS X)
...odules. How and why this was created instead of in my /usr/local folder, I do not know.
Deleting these local references fixed the phantom v0.6.1-pre. If anyone has an explanation, I'll choose that as the correct answer.
EDIT:
You may need to do the additional instructions as well:
sudo rm -rf /u...
Rails 4 multiple image or file upload using carrierwave
How can I upload multiple images from a file selection window using Rails 4 and CarrierWave? I have a post_controller and post_attachments model. How can I do this?
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Using link_to with embedded HTML
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Two ways. Either:
<%= link_to user_path(@user) do %>
<i class="icon-ok icon-white"></i> Do it@
<% end %>
Or:
<%= link_to '<i class="icon-ok icon-white"></i> Do it@'.html_safe, user_path(@user) %>
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Skip first entry in for loop in python?
In python, How do I do something like:
13 Answers
13
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How do I use define_method to create class methods?
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I think in Ruby 1.9 you can do this:
class A
define_singleton_method :loudly do |message|
puts message.upcase
end
end
A.loudly "my message"
# >> MY MESSAGE
sha...
Git rebase --continue complains even when all merge conflicts have been resolved
...ntly being applied to the branch you rebase on. After fixing the patch and doing
git add your/conflicted/file
git status
you will get a (usually green) line showing the modified file
modified: your/conflicted/file
git rebase --continue will work fine in this situation.
Sometimes, howev...
What's the purpose of using braces (i.e. {}) for a single-line if or loop?
... third one I can think of is nested if's:
if (cond1)
if (cond2)
doSomething();
Now, assume you now want to doSomethingElse() when cond1 is not met (new feature). So:
if (cond1)
if (cond2)
doSomething();
else
doSomethingElse();
which is obviously wrong, since the else ass...
Do a “git export” (like “svn export”)?
...his is with git archive. If you really need just the expanded tree you can do something like this.
git archive master | tar -x -C /somewhere/else
Most of the time that I need to 'export' something from git, I want a compressed archive in any case so I do something like this.
git archive master |...