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How do you tell if a string contains another string in POSIX sh?
...eter expansion, so it works in Bash, Dash, KornShell (ksh), Z shell (zsh), etc.
test "${string#*$word}" != "$string" && echo "$word found in $string"
A functionalized version with some examples:
# contains(string, substring)
#
# Returns 0 if the specified string contains the specified su...
How do I check if a variable exists?
...is condition to be true even if myVar is an empty list, zero, empty string etc.
– Gabriel
Jul 27 '18 at 18:09
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Parsing JSON Object in Java [duplicate]
...our JSONObjects from JSONArray using getJSONObject(index) function
6.) Fetch the data from JSONObject using index '"interestKey"'.
Note : JSON parsing uses the escape sequence for special nested characters if the json response (usually from other JSON response APIs) contains quotes (") like this...
Submit a form using jQuery [closed]
... additional parameters you can add to the ajax() request to handle errors, etc.
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java.lang.OutOfMemoryError: Java heap space
...the root cause with help of profiling tools like MAT, Visual VM , jconsole etc. Once you find the root cause, fix the leaks.
Important notes from oracle article
Cause: The detail message Java heap space indicates object could not be allocated in the Java heap. This error does not necessarily i...
SqlDataAdapter vs SqlDataReader
...ry on db, and only access this data at different rows, go to rpevious row, etc, then you can use the SQLDatareader and load it into a datatable using dtable.Load(rdr). Then browse up and down within this datatable. You can use this method instead of DataAdapter...
– variable
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Java Desktop application: SWT vs. Swing [closed]
...ause it integrates a lot of libraries and not only swing; also pivot, swt, etc
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Group query results by month and year in postgresql
...are not part of the aggregate (aka, all columns not inside SUM/AVG/MIN/MAX etc functions). This tells the query that the SUM() should be applied for each unique combination of columns, which in this case are the month and year columns. The "1,2" part is a shorthand instead of using the column aliase...
What is the string length of a GUID?
...do here is to store it as uniqueidentifier - this is then fully indexable, etc. at the database. The next-best option would be a binary(16) column: standard GUIDs are exactly 16 bytes in length.
If you must store it as a string, the length really comes down to how you choose to encode it. As hex (A...
Why do loggers recommend using a logger per class?
...ivate static readonly ILog _logger =
LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
public void SomeMethod()
{
_logger.DebugFormat("File not found: {0}", _filename);
}
One logger per app (or similar)
Logger.DebugFormat("File not found: {0}", _filename); // Logger...