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PHP parse/syntax errors; and how to solve them
Everyone runs into syntax errors. Even experienced programmers make typos. For newcomers, it's just part of the learning process. However, it's often easy to interpret error messages such as:
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How to test if parameters exist in rails
...ails to try and test if request parameters are set. Regardless of whether or not both parameters are set, the first part of the following if block gets triggered. How can I make this part ONLY get triggered if both params[:one] and params[:two] is set?
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How to remove all white space from the beginning or end of a string?
... String ".TrimEnd() -> " A String"
None of the methods modify the original string object.
(In some implementations at least, if there are no white-spaces to be trimmed, you get back the same string object you started with:
csharp> string a = "a";
csharp> string trimmed = a.Trim();
c...
Fragment or Support Fragment?
I am developing an app that supports Android >= 4.0. It uses fragments from the android.app package. As I am facing problems with the older fragment implementation in 4.0, like this one , that are already fixed in the support library, I am considering switching back to the fragment implementation...
How can I test that a value is “greater than or equal to” in Jasmine?
I want to confirm that a value is a decimal (or 0), so the number should be greater than or equal to zero and less than 1.
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How unique is UUID?
How safe is it to use UUID to uniquely identify something (I'm using it for files uploaded to the server)? As I understand it, it is based off random numbers. However, it seems to me that given enough time, it would eventually repeat it self, just by pure chance. Is there a better system or a patter...
Span inside anchor or anchor inside span or doesn't matter?
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BUT, I tend to only use a <span> inside an <a> if it's only for a part of the contents of the tag i.e.
<a href="#">some <span class="red">text</span></a>
Rather than:
<a href="#"><span class="red">some text</span></a>
Which should o...
How do I expand the output display to see more columns of a pandas DataFrame?
Is there a way to widen the display of output in either interactive or script-execution mode?
19 Answers
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How to Pass Parameters to Activator.CreateInstance()
... generic method that I have. This type has a number of overloaded constructors. I'd like to be able to pass arguments to the constructors, but
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How can a Java variable be different from itself?
...do the same with Double.NaN.
From JLS §15.21.1. Numerical Equality Operators == and !=:
Floating-point equality testing is performed in accordance with the rules of the IEEE 754 standard:
If either operand is NaN, then the result of == is false but the result of != is true.
Indeed, the test x!=x...