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In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
I can't seem to be able to find a summary that distinguishes the difference between these three annotations.
3 Answers
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Compare two files line by line and generate the difference in another file
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diff(1) is not the answer, but comm(1) is.
NAME
comm - compare two sorted files line by line
SYNOPSIS
comm [OPTION]... FILE1 FILE2
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-1 suppress lines unique to FILE1
-2 suppress line...
Haml: Control whitespace around text
...irst
= succeed ',' do
= link_to 'link somewhere', 'http://example.com'
- if @condition
then render this half of the sentence if a condition is met
Produces:
I will first
<a href="http://example.com">link somewhere</a>,
then render this half of the sentence if a condition is met
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Is it possible to write data to file using only JavaScript?
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Some suggestions for this -
If you are trying to write a file on client machine, You can't do this in any cross-browser way. IE does have methods to enable "trusted" applications to use ActiveX objects to read/write file.
If you are trying to save it on...
public friend swap member function
In the beautiful answer to the copy-and-swap-idiom there is a piece of code I need a bit of help:
2 Answers
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Precise Financial Calculation in JavaScript. What Are the Gotchas?
...now what mistakes to avoid when using JavaScript to do this type of math—if it is possible at all!
7 Answers
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How to implement “select all” check box in HTML?
...s_name); It's better than hard-coding the name and making the function specific to a particular set of checkboxes.
– ADTC
Apr 2 '16 at 4:39
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How to wait 5 seconds with jQuery?
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jQuery is written in javascript. If you include and use jQuery, you need javascript. If you have javascript, you have setTimeout.
– Alex Bagnolini
Dec 2 '09 at 22:08
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How do I implement interfaces in python?
... Pythons Abstract Base Classes, introduced in Python 2.6. They are useful, if you want to make base classes that cannot be instantiated, but provide a specific interface or part of an implementation.
Another usage is if you somehow want to specify that an object implements a specific interface, and...
Why is isNaN(null) == false in JS?
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I believe the code is trying to ask, "is x numeric?" with the specific case here of x = null. The function isNaN() can be used to answer this question, but semantically it's referring specifically to the value NaN. From Wikipedia for NaN:
NaN (Not a Number) is a value of the numeric d...