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Find objects between two dates MongoDB

I've been playing around storing tweets inside mongodb, each object looks like this: 14 Answers ...
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How to upgrade PowerShell version from 2.0 to 3.0

The OS that I am using is Windows 7, and the PowerShell version that is installed here is 2.0. Is it possible for me to upgrade it to version 3.0 or 4.0? ...
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How to auto-indent code in the Atom editor?

How do you auto-indent your code in the Atom editor? In other editors you can usually select some code and auto-indent it. ...
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How to export all collections in MongoDB?

I want to export all collections in MongoDB by the command: 26 Answers 26 ...
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Best practice for creating millions of small temporary objects

What are the "best practices" for creating (and releasing) millions of small objects? 13 Answers ...
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Saving interactive Matplotlib figures

...to save a Matplotlib figure such that it can be re-opened and have typical interaction restored? (Like the .fig format in MATLAB?) ...
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Rotating and spacing axis labels in ggplot2

... Change the last line to q + theme(axis.text.x = element_text(angle = 90, vjust = 0.5, hjust=1)) By default, the axes are aligned at the center of the text, even when rotated. When you rotate +/- 90 degrees, you usually want it to be alig...
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When to use generic methods and when to use wild-card?

I am reading about generic methods from OracleDocGenericMethod . I am pretty confused about the comparison when it says when to use wild-card and when to use generic methods. Quoting from the document. ...
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Fastest way to check if a string matches a regexp in ruby?

What is the fastest way to check if a string matches a regular expression in Ruby? 7 Answers ...
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How to convert List to int[] in Java? [duplicate]

This is similar to this question: How to convert int[] to Integer[] in Java? 16 Answers ...