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Java Byte Array to String to Byte Array
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You can't just take the returned string and construct a string from it... it's not a byte[] data type anymore, it's already a string; you need to parse it. For example :
String response = "[-47, 1, 16, 84, 2, 101, 110, 83, 111, 109, 101, 32, 78, 70, 67, 32, 68, 97, 116, 97]"; // re...
How to remove all line breaks from a string
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When parsing returned data from memcached in node.js using /[\n\r]/g did the trick for me. Thanks Gone Coding! The option in the answer butchered it.
– Kyle Coots
Sep 21 '18 at 3:11
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explicit casting from super class to subclass
...ever possibly work.
Because you're essentially just stopping the compiler from complaining, every time you cast it's important to check that you won't cause a ClassCastException by using instanceof in an if statement (or something to that effect.)
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Pandas: drop a level from a multi-level column index?
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You can use MultiIndex.droplevel:
>>> cols = pd.MultiIndex.from_tuples([("a", "b"), ("a", "c")])
>>> df = pd.DataFrame([[1,2], [3,4]], columns=cols)
>>> df
a
b c
0 1 2
1 3 4
[2 rows x 2 columns]
>>> df.columns = df.columns.droplevel()
>>...
What does the “static” modifier after “import” mean?
...mport
declaration. Where the normal import
declaration imports classes from
packages, allowing them to be used
without package qualification, the
static import declaration imports
static members from classes, allowing
them to be used without class
qualification.
So when should y...
Git command to show which specific files are ignored by .gitignore
... check-ignore -v $(find . -type f -print)
Make sure to exclude the files from the .git/ subfolder though.
Original answer 42009)
git ls-files -i
should work, except its source code indicates:
if (show_ignored && !exc_given) {
fprintf(stderr, "%s: --ignored needs some...
How to create a memory leak in Java?
...clears all references to the custom class or the ClassLoader it was loaded from.
Repeat.
Due to the way ThreadLocal is implemented in Oracle's JDK, this creates a memory leak:
Each Thread has a private field threadLocals, which actually stores the thread-local values.
Each key in this map is a w...
Re-doing a reverted merge in Git
...C---D
But does it all work? Sure it does. You can revert a merge, and from a
purely technical angle, git did it very naturally and had no real
troubles.
It just considered it a change from "state before merge" to
"state after merge", and that was it.
Nothing complicated, nothing odd,
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Virtual member call in a constructor
I'm getting a warning from ReSharper about a call to a virtual member from my objects constructor.
18 Answers
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Camera access through browser
... nice dialogue for you to choose either to take a picture or to upload one from your album i.e.
An example can be found here:
Capturing camera/picture data without PhoneGap
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