大约有 25,000 项符合查询结果（耗时：0.0530秒） [XML]
quick random row selection in Postgres
...
Check this link out for some different options.
http://www.depesz.com/index.php/2007/09/16/my-thoughts-on-getting-random-row/
Update: (A.Hatchkins)
The summary of the (very) long article is as follows.
The author lists four approaches:
1) ORDER BY random() LIMIT 1; -- slow
...
Difference between map and collect in Ruby?
...Actually they are documented in the same place under ruby-doc.org:
http://www.ruby-doc.org/core/classes/Array.html#M000249
ary.collect {|item| block } → new_ary
ary.map {|item| block } → new_ary
ary.collect → an_enumerator
ary.map → an_enumerator
Invokes block once for ...
Generating a random password in php
... a terribly insecure approach to generating a password. Please use @user3260409's answer below, where openssl_random_pseudo_bytes() is used instead of rand()
– Sorry-Im-a-N00b
Mar 30 '15 at 0:21
...
Setting Authorization Header of HttpClient
... likes me.
using (var client = new HttpClient())
{
var url = "https://www.theidentityhub.com/{tenant}/api/identity/v1";
client.DefaultRequestHeaders.Add("Authorization", "Bearer " + accessToken);
var response = await client.GetStringAsync(url);
// Parse JSON response.
....
}
r...
rbenv not changing ruby version
...e github directions. I am running OSX but I have tried this on a Ubuntu 12.04 VM and got the same results. The following is what i get in my terminal when I try to change ruby versions:
...
Can regular expressions be used to match nested patterns? [duplicate]
...: check:
http://dev.perl.org/perl6/rfc/145.html
ruby information: http://www.ruby-forum.com/topic/112084
more perl: http://www.perlmonks.org/?node_id=660316
even more perl: https://metacpan.org/pod/Text::Balanced
perl, perl, perl: http://perl.plover.com/yak/regex/samples/slide083.html
And one mo...
String.equals versus == [duplicate]
...are the same instance of object (ie. have same memory address)
Update: 01.04.2013 I updated this post due comments below which are somehow right. Originally I declared that interning (String.intern) is side effect of JVM optimization. Although it certainly save memory resources (which was what i me...
What is the difference between call and apply?
...y need them.
– some
Jul 16 '14 at 5:04
5
@KunalSingh Both call and apply takes two parameters. Th...
How to define Gradle's home in IDEA?
...guration" OR (C) "local gradle distribution" defined by jetbrains: https://www.jetbrains.com/help/idea/gradle-settings.html
A. Default Wrapper (recommended)
If you are able, select this recommended option. If it is grayed out, see option C, which should then set your default for all subsequent...
Hide options in a select list using jQuery
...chaoschaos
113k3030 gold badges288288 silver badges304304 bronze badges
50
...