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How do you query for “is not null” in Mongo?
...x only exist when there is something in the field). Here is a sample data set:
db.foo.find()
{ "_id" : ObjectId("544540b31b5cf91c4893eb94"), "imageUrl" : "http://example.com/foo.jpg" }
{ "_id" : ObjectId("544540ba1b5cf91c4893eb95"), "imageUrl" : "http://example.com/bar.jpg" }
{ "_id" : ObjectId("5...
Search text in fields in every table of a MySQL database
... @Dan Rather's answer helped too, because the db I was looking through was setup obscurely and I couldn't figure out what the column name or table would be for sure just by looking...
– DrCord
Jan 1 '14 at 19:14
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HTML text input allow only numeric input
Is there a quick way to set an HTML text input ( <input type=text /> ) to only allow numeric keystrokes (plus '.')?
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Date format Mapping to JSON Jackson
...this. You can make the JSON parse-able pretty easily by using ObjectMapper.setDateFormat:
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm a z");
myObjectMapper.setDateFormat(df);
In general, is there a way to process the variables before they get mapped to Object members by Jackson? Som...
Understanding slice notation
... What really annoys me is that python says that when you don't set the start and the end, they default to 0 and the length of sequence. So, in theory, when you use "abcdef"[::-1] it should be transformed to "abcdef"[0:6:-1], but these two expressions does not get the same output. I feel ...
When would you use the different git merge strategies?
From the man page on git-merge, there are a number of merge strategies you can use.
4 Answers
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CoffeeScript on Windows?
How can I try CoffeeScript on Windows?
13 Answers
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List passed by ref - help me explain this behaviour
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Why does Oracle 9i treat an empty string as NULL?
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Simply set not null constraint on your column and check only on empty string.
– Egor Skriptunoff
Jun 29 '13 at 23:27
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Compare JavaScript Array of Objects to Get Min / Max
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The only thing I would change is setting lowest and highest is a bit redundant. I would rather loop one less time and set lowest=highest=myArray[0] and then start the loop at 1.
– J. Holmes
Jan 14 '12 at 19:13
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