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Mongodb Explain for Aggregation framework
...ther manipulation will be in-memory (possibly using temporary files if the allowDiskUse option is set).
Optimizing pipelines
In general, you can optimize aggregation pipelines by:
Starting a pipeline with a $match stage to restrict processing to relevant documents.
Ensuring the initial $match / ...
How can I expand the full path of the current file to pass to a command in Vim?
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Rory O'Kane
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answered Jun 27 '12 at 8:27
Umber FerruleUmber...
Excel “External table is not in the expected format.”
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"External table is not in the expected format." typically occurs when trying to use an Excel 2007 file with a connection string that uses: Microsoft.Jet.OLEDB.4.0 and Extended Properties=Excel 8.0
Using the following connection string seems to fix most problems.
public static...
How do I call setattr() on the current module?
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answered May 29 '10 at 2:11
Alex MartelliAlex Martelli
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Where does the iPhone Simulator store its data?
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dsmudgerdsmudger
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mongodb count num of distinct values per field/key
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Here is example of using aggregation API. To complicate the case we're grouping by case-insens...
Create directories using make file
...ssuming a Unix-like environment.
MKDIR_P = mkdir -p
.PHONY: directories
all: directories program
directories: ${OUT_DIR}
${OUT_DIR}:
${MKDIR_P} ${OUT_DIR}
This would have to be run in the top-level directory - or the definition of ${OUT_DIR} would have to be correct relative to where ...
Delete directories recursively in Java
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With Java 7, we can finally do this with reliable symlink detection. (I don't consider Apache's commons-io to have reliable symlink detection at this time, as it doesn't handle links on Windows created with mklink.)
For the sake of history, here's...
How to fix the uninitialized constant Rake::DSL problem on Heroku?
...ixed my problems and I didn't know what was going on. (Using the rails installer on windows and deploying to heroku, as a complete beginner.)
– Jack V.
Jun 14 '11 at 22:46
1
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How to find out if an installed Eclipse is 32 or 64 bit version?
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answered Feb 24 '11 at 10:38
Sam DufelSam Dufel
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