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How do I convert Long to byte[] and back in java
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You could use the Byte conversion methods from Google Guava.
Example:
byte[] bytes = Longs.toByteArray(12345L);
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How to convert hex to rgb using Java?
...color to RGB code in Java? Mostly in Google, samples are on how to convert from RGB to hex.
17 Answers
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List passed by ref - help me explain this behaviour
...cing those integers.
Read the Passing Reference-Type Parameters section from this MSDN article on "Passing Parameters" for more information.
"How do I Clone a Generic List in C#" from StackOverflow talks about how to make a deep copy of a List.
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Matrix Transpose in Python
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if you're going to iterate through the results, izip from itertools can save memory for large arrays.
– Antony Hatchkins
Mar 28 '13 at 8:38
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Using Selenium Web Driver to retrieve value of a HTML input
... That's what I've bumped into right now: trying to get a value from a textarea, which is neither a "value" attribute, nor a between-tag text (set dynamically as "value" attribute.
– C-F
Jun 5 '17 at 22:03
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How to change maven logging level to display only warning and errors?
I want to prevent maven from displaying INFO messages, I want to see only WARNINGS and ERRORS (if any).
10 Answers
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What's valid and what's not in a URI query?
...ose under the HTTP scheme, they don't have to be escaped in data. The note from § 2.3 about reserved characters being those that change semantics when percent-encoded applies only generally; characters may be percent-encoded without changing semantics for specific schemes and yet still be reserved....
How to convert a table to a data frame
...rs, another way I've used is data.frame(rbind(mytable)). Using the example from @X.X:
> freq_t = table(cyl = mtcars$cyl, gear = mtcars$gear)
> freq_t
gear
cyl 3 4 5
4 1 8 2
6 2 4 1
8 12 0 2
> data.frame(rbind(freq_t))
X3 X4 X5
4 1 8 2
6 2 4 1
8 12 0 2
If t...
How to check for an undefined or null variable in JavaScript?
...he JSHint syntax checker even provides the eqnull option for this reason.
From the jQuery style guide:
Strict equality checks (===) should be used in favor of ==. The only
exception is when checking for undefined and null by way of null.
// Check for both undefined and null values, for some ...
No submodule mapping found in .gitmodule for a path that's not a submodule
... mentions:
do you get the same error when running 'git submodule init' from a fresh clone?
If so, you have something wrong.
If you have no submodules, delete .gitmodules, and any references to submodules in
.git/config, and ensure the Pikimal dir does not have a .git dir in it.
If t...