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Efficient SQL test query or validation query that will work across all (or most) databases
...ork as a value for Apache Commons DBCP's validationQuery, since the query doesn't return any rows
VALUES 1 or SELECT 1 FROM SYSIBM.SYSDUMMY1
Apache Derby (via daiscog)
SELECT 1 FROM SYSIBM.SYSDUMMY1
DB2
select count(*) from systables
Informix
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mongo - couldn't connect to server 127.0.0.1:27017
...P) or that it was not running. One thing to note is the log trace provided does not cover the "Fri Nov 9 16:44:06" of your mongo timestamp.
Can you:
Provide the command line arguments (if any) used to start your
mongod process
Provide the log file activity from the mongod startup as well as
logs...
Case insensitive comparison of strings in shell script
...cript. However, I want to compare two strings ignoring case, how can it be done? Is there any standard command for this?
12...
How to open a second activity on click of button in android app
...ivity.class);
startActivity(intent);
}
And the most important thing: don't forget to define your activity in manifest.xml
<activity>
android:name=".ToActivity"
android:label="@string/app_name">
</activity>
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Find index of last occurrence of a sub-string using T-SQL
...ttle googling revealed this - Function To Retrieve Last Index - but that does not work if you pass in a "text" column expression. Other solutions found elsewhere work only so long as the text you are searching for is 1 character long.
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List all base classes in a hierarchy of given class?
Given a class Foo (whether it is a new-style class or not), how do you generate all the base classes - anywhere in the inheritance hierarchy - it issubclass of?
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Find a file in python
...os.walk and on a larger directory got times around 3.5 sec. I tried two random solutions with no great improvement, then just did:
paths = [line[2:] for line in subprocess.check_output("find . -iname '*.txt'", shell=True).splitlines()]
While it's POSIX-only, I got 0.25 sec.
From this, I believe ...
How to specify jackson to only use fields - preferably globally
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withGetterVisibility doesn't cover is* methods, but there's withIsGetterVisibility for them.
– qerub
May 12 '12 at 19:23
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Cannot obtain value of local or argument as it is not available at this instruction pointer, possibl
...he "Optimize Code" checkbox is unchecked.
Also, set the "Debug Info" dropdown to "Full" in the Advanced Options (Under Build tab).
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Convert object string to JSON
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this does not make sense, if string is from trusted source, why we convert it instead we make it as valid json.
– allenhwkim
Jan 2 '14 at 17:42
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