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xpath find if node exists
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Patrick McDonaldPatrick McDonald
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How do CDI and EJB compare? interact?
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50
CDI: it is about dependency injection. It means that you can inject interface implementation an...
MySQL “Group By” and “Order By”
..., so unless they are the same, the values chosen are indeterminate."
As of 5.7.5 ONLY_FULL_GROUP_BY is enabled by default so non-aggregate columns cause query errors (ER_WRONG_FIELD_WITH_GROUP)
As @mikep points out below the solution is to use ANY_VALUE() from 5.7 and above
See
http://www.cafewebmas...
Self-references in object literals / initializers
...he only thing that I can tell you about are getter:
var foo = {
a: 5,
b: 6,
get c() {
return this.a + this.b;
}
}
console.log(foo.c) // 11
This is a syntactic extension introduced by the ECMAScript 5th Edition Specification, the syntax is supported by most modern bro...
Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
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50
Not answering the specifics of your question so much as the title: the 2006 Technical Report on...
How to print binary tree diagram?
...;Integer>(7);
Node<Integer> n12 = new Node<Integer>(5);
Node<Integer> n21 = new Node<Integer>(2);
Node<Integer> n22 = new Node<Integer>(6);
Node<Integer> n23 = new Node<Integer>(3);
Node<Integer> n24 = n...
How do I generate random integers within a specific range in Java?
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+150
In Java 1.7 or later, the standard way to do this is as follows:
import java.util.concurrent.ThreadLocalRandom;
// nextInt is norma...
Cannot find executable for CFBundle CertUIFramework.axbundle
Just updated to Xcode 5 and this is the first error its throwing on the logger for all my apps. Can't seem to understand why this is happening.
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Can overridden methods differ in return type?
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public Circle build() {
....
}
This is specified in section 8.4.5 of the Java Language Specification:
Return types may vary among methods that override each other if the return types are reference types. The notion of return-type-substitutability supports covariant returns, that is, t...
Managing relationships in Laravel, adhering to the repository pattern
...loperfideloper
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