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Hidden Features of Java
...cally not so widely known as a way to store per-thread state.
Since JDK 1.5 Java has had extremely well implemented and robust concurrency tools beyond just locks, they live in java.util.concurrent and a specifically interesting example is the java.util.concurrent.atomic subpackage that contains th...
How do I create a MongoDB dump of my database?
... dump/blog
blog.posts to dump/log/blog.posts.bson
59 objects
DATABASE: admin to dump/admin
Source: http://www.mongodb.org/display/DOCS/Import+Export+Tools
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Cannot add or update a child row: a foreign key constraint fails
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answered Feb 15 '11 at 15:16
Brian DriscollBrian Driscoll
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Get array of object's keys
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// (or maybe some other order, keys are unordered).
This is an ES5 feature. This means it works in all modern browsers but will not work in legacy browsers.
The ES5-shim has a implementation of Object.keys you can steal
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git pull error :error: remote ref is at but expected
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15 Answers
15
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sendmail: how to configure sendmail on ubuntu? [closed]
...`your.isp.net')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
FEATURE(`authinfo',`hash -o /etc/mail/auth/client-info.db')dnl
Invoke creation sendmail.cf (alternatively run make -C /etc/mail):
m4 sendmail.mc > sendmail.cf
Restart the sendmail daemon:
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How to find reason of failed Build without any error or warning
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edited Jun 30 at 6:35
Mr. C. Soldier
2366 bronze badges
answered Dec 11 '14 at 14:42
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CORS: Cannot use wildcard in Access-Control-Allow-Origin when credentials flag is true
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This is a part of security, you cannot do that. If you want to allow credentials then your Acce...
Safe characters for friendly url [closed]
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answered Mar 29 '09 at 21:57
Skip HeadSkip Head
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Assert equals between 2 Lists in Junit
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For junit4! This question deserves a new answer written for junit5.
I realise this answer is written a couple years after the question, probably this feature wasn't around then. But now, it's easy to just do this:
@Test
public void test_array_pass()
{
List<String> actual = Arrays.a...