大约有 19,594 项符合查询结果（耗时：0.0383秒） [XML]
How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
... solution.
The method is construct_finder_sql(options) (lib/active_record/base.rb:1681) you will have to use send because it is private.
Edit: construct_finder_sql was removed in Rails 5.1.0.beta1.
share
|
...
Generate a Hash from string in Javascript
...ng-strings) and the bitwise function is actually more slow than the number based function.
– skerit
Jun 29 '12 at 21:23
17
...
How can I get the full/absolute URL (with domain) in Django?
...n your INSTALLED_APPS, it won't hit the DB at all, and provide information based on the Request object (see get_current_site)
– Darb
Jan 31 '12 at 10:04
...
Generating Random Passwords
...
this method (base 62) is superior than the GUID(base 16) on strength: an 8-char hex string is equivalent to a 4-5 char alphanumeric one
– Jimmy
Sep 10 '08 at 18:51
...
Order of member constructor and destructor calls
... for
the constructor of the most derived
class as described below, virtual base
classes shall be initialized in the
order they appear on a depth-first
left-to-right traversal of the
directed acyclic graph of base
classes, where “left-to-right” is the
order of appearance of the base class
names i...
Using pg_dump to only get insert statements from one table within database
...o get all rows as INSERT statements from one specific table within a database using pg_dump in PostgreSQL.
4 Answers
...
what's the correct way to send a file from REST web service to client?
...
I don't recommend encoding binary data in base64 and wrapping it in JSON. It will just needlessly increase the size of the response and slow things down.
Simply serve your file data using GET and application/octect-streamusing one of the factory methods of javax.ws....
Get the current displaying UIViewController on the screen in AppDelegate.m
...er on iPhone):
extension UIApplication {
class func topViewController(base: UIViewController? = UIApplication.sharedApplication().keyWindow?.rootViewController) -> UIViewController? {
if let nav = base as? UINavigationController {
return topViewController(base: nav.visib...
Send attachments with PHP Mail()?
...age';
$content = file_get_contents($file);
$content = chunk_split(base64_encode($content));
// a random hash will be necessary to send mixed content
$separator = md5(time());
// carriage return type (RFC)
$eol = "\r\n";
// main header (multipart mandatory)
$header...
Where and why do I have to put the “template” and “typename” keywords?
...the keywords are forbidden, as detailed below
On the name of a dependent base class you are not allowed to write typename. It's assumed that the name given is a class type name. This is true for both names in the base-class list and the constructor initializer list:
template <typename T>
...