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How to get last N records with activerecord?
With :limit in query, I will get first N records. What is the easiest way to get last N records?
14 Answers
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Batch: Remove file extension
...file name without extension from param %1 in a batch script. echo %~n1 was what I was after.
– Dave Pile
Nov 30 '19 at 9:13
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Does git return specific return error codes?
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I set-up a test to fail. This is what I got:
$ git merge newbranch
Auto-merging test.txt
CONFLICT (content): Merge conflict in test.txt
Automatic merge failed; fix conflicts and then commit the result.
$ echo $?
1
Git returns 0 when it merges correctly, ...
How do I parse JSON with Ruby on Rails? [duplicate]
...N you might notice it's a subset of YAML, and, actually the YAML parser is what's handling JSON. You can do this too:
require 'yaml'
YAML.load(string_to_parse)
# => [{"foo"=>1, "bar"=>2}]
If your app is parsing both YAML and JSON, you can let YAML handle both flavors of serialized data....
Why is there no Char.Empty like String.Empty?
...field for Int32.Zero, would you use that instead of the literal 0? If not, what's the difference here?
– Jon Skeet
Sep 8 '10 at 18:17
8
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Xcode 5: Code signing entitlement errors
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I went through many of the steps above but what finally worked for me was refreshing my profiles in Xcode. Not sure why it was necessary since my app's distribution profile was showing up in the list already. Here are the steps:
Xcode Preferences
Accounts tab
Selec...
Configuring so that pip install can work from github
...nstall private packages to our production servers. This question concerns what needs to be in the github repo in order for the install to be successful.
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How to fix Git error: object file is empty?
...f6c73fb68466264c68e) is corrupt
Step 3: Remove the empty file. I figured what the heck; its blank anyway.
nathanvan@nathanvan-N61Jq:~/workspace/mcmc-chapter$ rm .git/objects/8b/61d0135d3195966b443f6c73fb68466264c68e
rm: remove write-protected regular empty file `.git/objects/8b/61d0135d3195966b...
What is the difference D3 datum vs. data?
...new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f13728402%2fwhat-is-the-difference-d3-datum-vs-data%23new-answer', 'question_page');
}
);
Post as a guest
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Efficient string concatenation in C++
...ounds to speed up concatenation. Are any of these really necessary? If so, what is the best way to concatenate strings in C++?
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