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Convert ArrayList to String[] array [duplicate]
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According to Joshua Bloch in Effective Java, preallocating the array harms performance. Provide a zero-length array instead. stockList.toArray(new String[0])
– Crashh
Mar 10 '18 at 3:20
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Is there a Subversion command to reset the working copy?
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Pure Windows cmd/bat solution:
svn cleanup .
svn revert -R .
For /f "tokens=1,2" %%A in ('svn status --no-ignore') Do (
If [%%A]==[?] ( Call :UniDelete %%B
) Else If [%%A]==[I] Call :UniDelete %%B
)
svn update .
goto :eof
:UniDelete delete file/dir
IF EXIST "%1\*" (
RD /S /Q ...
Beginner's guide to ElasticSearch [closed]
...e in Action book (at least the general chapters on the indexing, analysis, tokenization, and constructing queries)
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“static const” vs “#define” vs “enum”
...ll appear in the object code as part of the instructions rather than being allocated storage in the data segment or in heap or on the stack. You'll have some space allocated for the static const int, but the compiler might optimize it away if you don't take an address.
– Jonat...
Does assignment with a comma work?
...er vs AssignmentExpression) in the grammar and just happen to use the same token.
– Ryan Cavanaugh
Apr 1 '14 at 2:53
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Git, fatal: The remote end hung up unexpectedly
...ps protocol which requires username and password through a personal access token – I prefer the later
– Raul
Jul 21 '16 at 9:30
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Command not found error in Bash variable assignment
..."If all the characters preceding '=' form a valid name (see XBD Name), the token ASSIGNMENT_WORD shall be returned." Following the link to section 3.231 of pubs.opengroup.org/onlinepubs/9699919799, we find "In the shell command language, a word consisting solely of underscores, digits, and alphabet...
Determine whether JSON is a JSONObject or JSONArray
...d better way to determine:
String data = "{ ... }";
Object json = new JSONTokener(data).nextValue();
if (json instanceof JSONObject)
//you have an object
else if (json instanceof JSONArray)
//you have an array
tokenizer is able to return more types: http://developer.android.com/reference/org/...
How to get the user input in Java?
...t.println("Enter a number: ");
int n = reader.nextInt(); // Scans the next token of the input as an int.
//once finished
reader.close();
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How do I check if a list is empty?
...ient if the array is of a significant size. Also, typically, you would not allocate memory for an empty array (pointer remains null), so it makes no sense to attempt to get its length. I am not saying that len(a) == 0 is not a good way of doing it, it just does not scream 'C' to me when I see it.
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