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Cannot pass null argument when using type hinting
...n pass it a null value.
This is documented in the section in the manual about Type Declarations:
The declaration can be made to accept NULL values if the default value of the parameter is set to NULL.
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In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
... understand, let's look into how these constraints are defined and carried out (I'm using version 4.1):
The @NotNull constraint is defined as:
@Constraint(validatedBy = {NotNullValidator.class})
This class has an isValid method defined as:
public boolean isValid(Object object, Constraint...
Android 4.3 Bluetooth Low Energy unstable
...ideo tutorial: Developing Bluetooth Smart Applications for Android http://youtu.be/x1y4tEHDwk0
The issue and work around described below is probably fixed now by OS updates
Work around: I could "stabilize" my app doing that...
I provide the user a setting "Restart Bluetooth". If that setting is ...
Setting up two different static directories in node.js Express framework
...ternate_static will be served as if they were in the same directory. Watch out for filename clobbers, though.
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git produces Gtk-WARNING: cannot open display
...f there is no X (ie. logged in via PuTTY over SSH). You may simply comment out the line in this file (do not delete file or it will be recovered after update of openssh-askpass package). Or remove package openssh-askpass completely (yum remove openssh-askpass).
– Milan Kerslage...
XmlWriter to Write to a String Instead of to a File
... declaration written by XmlWriter. Of course, if you then write the string out elsewhere in binary form, make sure you use an encoding which matches whichever encoding you fix for the StringWriter. (The above code always assumes UTF-8; it's trivial to make a more general version which accepts an enc...
Loading Backbone and Underscore using RequireJS
... the advantages of not using a forked version of Backbone & Underscore outweigh the benefits of using the AMD fork recommended in the other popular answer, but either way works.
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Java Synchronized Block for .class
...that the first two examples have the keyword "static". Just pointing that out to others who may have seen this and missed it. Without the static keyword the first two examples would not be the same.
– kurtzbot
Jul 24 '14 at 16:23
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How to move certain commits to be based on another branch in git?
...
# let's go to current master (X, where quickfix2 should begin)
git checkout master
# replay every commit *after* quickfix1 up to quickfix2 HEAD.
git rebase --onto master quickfix1 quickfix2
So you should go from
o-o-X (master HEAD)
\
q1a--q1b (quickfix1 HEAD)
\
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File content into unix variable with newlines
...documentation (a bash internal command), and you'll see why the spaces are output:
echo [-neE] [arg ...]: Output the args, separated by spaces, followed by a newline.
When you use echo "$x", it forces the entire x variable to be a single word according to bash, hence it's not split. You can se...