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How do I check if the Java JDK is installed on Mac?

...ary/Java/JavaVirtualMachines/ Then run ls command in the terminal again. Now you can see the jdk version & package if exists in your computer. share | improve this answer | ...
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How to var_dump variables in twig templates?

...you only present what you have been given is fine and all, but how do you know what is available? Is there a "list all defined variables" functionality in TWIG? Is there a way to dump a variable? ...
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Input size vs width

...wer is correct according to the HTML specification. I've edited the answer now to clarify things a bit. – Mark Bell Aug 5 '15 at 10:19  |  sho...
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MPICH vs OpenMPI

...rted by Cray. More recently, MPICH supported InfiniBand through a netmod (now deprecated), but MVAPICH2 has extensive optimizations that make it the preferred implementation in nearly all cases. Feature Support from the Latest MPI Standard An orthogonal axis to hardware/platform support is covera...
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What is a NullReferenceException, and how do I fix it?

... case: string GetCategory(Book b) { if (b == null) return "Unknown"; return b.Category; } Explicitly check for null from method calls and throw a custom exception. You can also throw a custom exception, only to catch it in the calling code: string GetCategory(string bookTitle) { ...
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What's “P=NP?”, and why is it such a famous question? [closed]

...ix multiplication, the basic operation is multiplication of two numbers. Now the question is, what does deterministic vs. non-deterministic mean? There is an abstract computational model, an imaginary computer called a Turing machine (TM). This machine has a finite number of states, and an infin...
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Iterate through options

... 0; i < select.length; i++){ var option = select.options[i]; // now have option.text, option.value } share | improve this answer | follow | ...
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Automatically remove Subversion unversioned files

Does anybody know a way to recursively remove all files in a working copy that are not under version control? (I need this to get more reliable results in my automatic build VMware.) ...
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What is difference between functional and imperative programming languages?

... see how anyone could read this answer and come away feeling confident in knowing the difference between declarative and procedural programming. – Ringo Apr 24 '17 at 7:02 add...
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Generic type conversion FROM string

...aits class. In this way, you would have a parameterised helper class that knows how to convert a string to a value of its own type. Then your getter might look like this: get { return StringConverter<DataType>.FromString(base.Value); } Now, I must point out that my experience with parameter...