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How to create correct JSONArray in Java using JSONObject
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Here is some code using java 6 to get you started:
JSONObject jo = new JSONObject();
jo.put("firstName", "John");
jo.put("lastName", "Doe");
JSONArray ja = new JSONArray();
ja.put(jo);
JSONObject mainObj = new JSONObject();
mainObj.put("employees", ja);
Edit: Si...
Various ways to remove local Git changes
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It all depends on exactly what you are trying to undo/revert. Start out by reading the post in Ube's link. But to attempt an answer:
Hard reset
git reset --hard [HEAD]
completely remove all staged and unstaged changes to tracked files.
I find myself often using hard resetting, when...
Byte order mark screws up file reading in Java
...very good way to detect what encoding some bytes are in, but if the stream starts with a BOM, apparently this can be helpful.
Edit: If you need to detect the BOM in UTF-16, UTF-32, etc, then the constructor should be:
new BOMInputStream(is, ByteOrderMark.UTF_8, ByteOrderMark.UTF_16BE,
Byte...
Filter rows which contain a certain string
...are the following reasons.
The functions provided by the stringr package start with the prefix str_, which makes the code easier to read.
The first argument of the functions of stringr package is always the data.frame (or value), then comes the parameters.(Thank you Paolo)
object <- "stringr"...
How can I select the first day of a month in SQL?
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SELECT DATEADD(month, DATEDIFF(month, 0, @mydate), 0) AS StartOfMonth
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How to elegantly deal with timezones
...s section on sf4answers, users enter an address for an event, as well as a start date and an optional end date. These times are translated into a datetimeoffset in SQL server that accounts for the offset from UTC.
This is the same problem you are facing (although you are taking a different approac...
How many bits or bytes are there in a character? [closed]
...Unicode strings are stored using the wchar_t type. By the way, when NT was started a wchar_t was enough to avoid surrogate pairs, but now that it's UTF-16 even wchar_t strings can have variable-length characters, so on Windows a Unicode character in can take from 2 to 4 bytes (1 or 2 wchar_t).
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How to copy files across computers using SSH and MAC OS X Terminal [closed]
...ately, I keep getting a "not a regular file" response for directories that start with '.' like the .rvm folder im trying to transfer, any tips?
– alvincrespo
Sep 14 '10 at 16:57
1
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Verify version of rabbitmq
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If rabbitimq can not start I found the only way to determine version is via installer system.
Eample Debian/Ubuntu:
dpkg -s rabbitmq-server | grep Version
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TypeError: unhashable type: 'dict'
...d/or lists, you need to recursively "freeze" the prospective key. Here's a starting point:
def freeze(d):
if isinstance(d, dict):
return frozenset((key, freeze(value)) for key, value in d.items())
elif isinstance(d, list):
return tuple(freeze(value) for value in d)
retur...