大约有 20,000 项符合查询结果（耗时：0.0245秒） [XML]
Combine two ActiveRecord::Relation objects
...where.none_of(search.where.not(id: ids_to_exclude).merge(search.where.not("title ILIKE ?", "%#{query}%")))
You have here (A u B)' = A' ^ B'
UPDATE:
The solution above is good for more complex cases.
In your case smth like that will be enough:
User.where('first_name LIKE ? OR last_name LIKE ?', ...
Android Studio Editor Font Sizing
...Go to Preferences (Settings in Windows) Menu and select the Keymap section title on the left. On the right sections' search box, type in font. You will find several entries including Increase Font Size and Decrease Font Size. You can double click each of these to add a keyboard shortcut.
For mine...
How to close current tab in a browser window?
...
You will need Javascript to do this. Use window.close():
close();
Note: the current tab is implied. This is equivalent:
window.close();
or you can specify a different window.
So:
function close_window() {
if (confirm("Close Window?")...
Alternative timestamping services for Authenticode
...RTM (!)) the timestamp server at Verisign (" http://timestamp.verisign.com/scripts/timstamp.dll ") decides to go offline intermittently.
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How do I create directory if none exists using File class in Ruby?
...ooks.rb
screenshotName = "#{@screenshotfolder}/failed-#{scenario_object.title.gsub(/\s+/,"_")}-#{Time.new.strftime("%Y%m%d%H%M%S")}_screenshot.png";
@browser.take_screenshot(screenshotName) if scenario.failed?
embed(screenshotName, "image/png", "SCREENSHOT") if scenario.failed?
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How to install both Python 2.x and Python 3.x in Windows
...ble (to default on double click):
Name: PY_PYTHON
Value: 3
To launch a script in a particular interpreter, add the following shebang (beginning of script):
#! python2
To execute a script using a specific interpreter, use the following prompt command:
> py -2 MyScript.py
To launch a spec...
Ruby off the rails
...d.
My domain is usually client-side Windows applications (wxRuby GUI) and scripts, automating Excel, Internet Explorer, SQL Server queries and report generation (win32ole COM automation). I also use the sqlite, pdf-writer, and gruff libraries for various data munging and graph generation tasks.
Ra...
Apache is downloading php files instead of displaying them
...ml
in a .htaccess file of your web content folder, it can cause your PHP scripts to stop working. In my case the server did not know the x-mapp-php6 type, since that .htaccess file was something I imported from a different web host when I transferred the website content.
Just removing the AddHand...
Invoking JavaScript code in an iframe from the parent page
...ally, I have an iframe embedded in a page and the iframe has some JavaScript routines I need to invoke from the parent page.
...
How to play an android notification sound
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I got an error with this: MediaPlayer - Should have subtitle controller already set. What does it mean?
– Deqing
May 11 '14 at 11:20
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