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Include all existing fields and add new fields to document
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In 4.2+, you can use the $set aggregation pipeline operator which is nothing other than an alias to $addFieldsadded in 3.4
The $addFields stage is equivalent to a $project stage that explicitly specifies all existing fields in the input documents...
How do I determine if my python shell is executing in 32bit or 64bit?
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What are the rules for evaluation order in Java?
I am reading some Java text and got the following code:
5 Answers
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How to convert std::string to LPCSTR?
How can I convert a std::string to LPCSTR ? Also, how can I convert a std::string to LPWSTR ?
9 Answers
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How to cherry-pick multiple commits
I have two branches. Commit a is the head of one, while the other has b , c , d , e and f on top of a . I want to move c , d , e and f to first branch without commit b . Using cherry pick it is easy: checkout first branch cherry-pick one by one c to f and rebase second branch on...
How to write log to file
...nil {
log.Fatalf("error opening file: %v", err)
}
defer f.Close()
log.SetOutput(f)
log.Println("This is a test log entry")
Based on the Go docs, os.Open() can't work for log.SetOutput, because it opens the file "for reading:"
func Open
func Open(name string) (file *File, err error) O...
Why is Go so slow (compared to Java)?
As we could see from The Computer Language Benchmarks Game in 2010:
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Update all objects in a collection using LINQ
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How to make a valid Windows filename from an arbitrary string?
...g like "Foo: Bar" that I want to use as a filename, but on Windows the ":" char isn't allowed in a filename.
14 Answers
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Pretty Printing a pandas dataframe
...function does not seem to be printing the index of the Pandas DataFrame. I set the index using df.index.name = 'index' but this does not print the index column with a name.
– edesz
Mar 12 '15 at 21:21
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