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How to solve PHP error 'Notice: Array to string conversion in…'

...n $_POST['C']. So when you echo that, you are trying to print an array, so all it does is print Array and a notice. To print properly an array, you either loop through it and echo each element, or you can use print_r. Alternatively, if you don't know if it's an array or a string or whatever, you c...
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How to test code dependent on environment variables using JUnit?

... value); } } For Java 5 to 7 the library System Rules has a JUnit rule called EnvironmentVariables. import org.junit.contrib.java.lang.system.EnvironmentVariables; public class EnvironmentVariablesTest { @Rule public final EnvironmentVariables environmentVariables = new EnvironmentVariab...
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(this == null) in C#!

...in sematic checks) in the compiler: it should NOT be possible. You are not allowed to write : base(CheckNull()) if CheckNull is not static, and alike you should not be able to inline an instance-bound lambda. – quetzalcoatl Aug 14 '12 at 0:29 ...
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Difference between Node object and Element object?

I am totally confused between Node object and Element object. document.getElementById() returns Element object while document.getElementsByClassName() returns NodeList object(Collection of Elements or Nodes?) ...
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Mongoose subdocuments vs nested schema

...still have the same subdocument structure. – Martin Hallén Jul 9 '14 at 9:17 2 you should also c...
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What is context in _.each(list, iterator, [context])?

... The context lets you provide arguments at call-time, allowing easy customization of generic pre-built helper functions. some examples: // stock footage: function addTo(x){ "use strict"; return x + this; } function pluck(x){ "use strict"; return x[this]; } function l...
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Good example of livelock?

...ontinue; } // Spouse wasn't hungry, so finally eat spoon.use(); isHungry = false; System.out.printf( "%s: I am stuffed, my darling %s!%n", name, spouse.getName());...
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C# binary literals

... @Dai that’s no different than hex literals. In other words, all constants are big endian, but stored little endian on Intel/AMD and most ARMs. 0xDEADBEEF will be stored as 0xEF 0xBE 0xAD 0xDE – Cole Johnson Sep 2 '19 at 18:28 ...
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Image loaded event in for ng-src in AngularJS

..."dynamically inserted url"/> . When a single image is loaded, I need to apply iScroll refresh() method so that to make image scrollable. ...
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Maven: add a dependency to a jar by relative path

...control, and link to it by relative path from the pom.xml file. If you really want this (understand, if you can't use a corporate repository), then my advice would be to use a "file repository" local to the project and to not use a system scoped dependency. The system scoped should be avoided, su...