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What does this symbol mean in JavaScript?

...ncatenation, and subtraction operators; unary sign operators What does = +_ mean in JavaScript, Single plus operator in javascript What's the significant use of unary plus and minus operators? Why is [1,2] + [3,4] = "1,23,4" in JavaScript? Why does JavaScript handle the plus and minus operators bet...
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kill -3 to get java thread dump

...'s stdout is placed. If you have a Tomcat server, this will be the catalina_(date).out file. share | improve this answer | follow | ...
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How can I validate a string to only allow alphanumeric characters in it?

...char.IsLetterOrDigit instead IsLetter+IsNumber – nick_n_a Oct 30 '18 at 8:27 add a comment  |  ...
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“Connection for controluser as defined in your configuration failed” with phpMyAdmin in XAMPP

... find a sub-directory called sql. In sql you will find a file called create_tables.sql. Open it in a text editor. In phpMyAdmin, select the phpmyadmin database and click on the "SQL" tab. Copy/paste the entire text from create_tables.sql into the text box, and run the query. Open the config.inc.php ...
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Pretty printing JSON from Jackson 2.2's ObjectMapper

... You can enable pretty-printing by setting the SerializationFeature.INDENT_OUTPUT on your ObjectMapper like so: mapper.enable(SerializationFeature.INDENT_OUTPUT); share | improve this answer ...
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Java / Android - How to print out a full stack trace?

... yup you're right @PhilippReichart. Here's the code for Log.d on AOSP 4.2.2_r1 – Ehtesh Choudhury Apr 25 '13 at 17:06 ...
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AngularJs ReferenceError: $http is not defined

... I wonder why Angular's own documentation (docs.angularjs.org/tutorial/step_05) has this error. – Anurag Oct 9 '13 at 11:49 add a comment  |  ...
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Fastest check if row exists in PostgreSQL

...ex on contact, it can usually reduce time cost to 1 ms. CREATE INDEX index_contact on contact(id); share | improve this answer | follow | ...
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warning this call is not awaited, execution of the current method continues

...scard variables: Discards - C# Guide, which can also help in this regard. _ = SomeMethodAsync(); share | improve this answer | follow | ...
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Retrieving Property name from lambda expression

...n u.Operand is MemberExpression m => m.Member.Name, _ => throw new NotImplementedException(expression.GetType().ToString()) }; share | improve this answ...