大约有 45,100 项符合查询结果（耗时：0.0453秒） [XML]
Find all records which have a count of an association greater than zero
...t.pluck :article_id
=> [43, 34, 45, 55, 17, 19, 1, 3, 4, 18, 44, 5, 13, 22, 16, 6, 53]
[11] pry(main)> _.size
=> 17
[12] pry(main)> Article.joins(:comments).size
=> 45
[13] pry(main)> Article.joins(:comments).distinct.size
=> 17
[14] pry(main)> Article.joins(:comments).distin...
Xcode find caller functions
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126
Xcode 4.5 (in beta) has this functionality. when you highlight say... a function, you can check...
Django Admin - Disable the 'Add' action for a specific model
...33
Dadep
2,62244 gold badges2121 silver badges3737 bronze badges
answered Nov 10 '10 at 11:41
Frost.bakaFrost....
How to send POST request?
...
>>> r = requests.post("http://bugs.python.org", data={'number': 12524, 'type': 'issue', 'action': 'show'})
>>> print(r.status_code, r.reason)
200 OK
>>> print(r.text[:300] + '...')
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xh...
How to “git clone” including submodules?
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With version 2.13 of Git and later, --recurse-submodules can be used instead of --recursive:
git clone --recurse-submodules -j8 git://github.com/foo/bar.git
cd bar
Editor’s note: -j8 is an optional performance optimization that becam...
Javascript library for human-friendly relative date formatting [closed]
... date) / 1000);
var minute = 60,
hour = minute * 60,
day = hour * 24,
week = day * 7;
var fuzzy;
if (delta < 30) {
fuzzy = 'just then.';
} else if (delta < minute) {
fuzzy = delta + ' seconds ago.';
} else if (delta < 2 * minute) {
fuzzy = 'a minute ago.'
} else i...
Why is my program slow when looping over exactly 8192 elements?
...
2 Answers
2
Active
...
Find the day of a week
...
df = data.frame(date=c("2012-02-01", "2012-02-01", "2012-02-02"))
df$day <- weekdays(as.Date(df$date))
df
## date day
## 1 2012-02-01 Wednesday
## 2 2012-02-01 Wednesday
## 3 2012-02-02 Thursday
Edit: Just to show another way......
Getting a list of files in a directory with a glob
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240
You can achieve this pretty easily with the help of NSPredicate, like so:
NSString *bundleRoo...