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How do I mock an open used in a with statement (using the Mock framework in Python)?
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What is the difference between a Docker image and a container?
When using Docker, we start with a base image. We boot it up, create changes and those changes are saved in layers forming another image.
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How to remove duplicate white spaces in string using Java?
How to remove duplicate white spaces (including tabs, newlines, spaces, etc...) in a string using Java?
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How can I use “:” as an AWK field separator?
Given the following command,
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Fastest check if row exists in PostgreSQL
I have a bunch of rows that I need to insert into table, but these inserts are always done in batches. So I want to check if a single row from the batch exists in the table because then I know they all were inserted.
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How to make an empty div take space
This is my 960 grid system case:
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?? Coalesce for empty string?
Something I find myself doing more and more is checking a string for empty (as in "" or null) and a conditional operator.
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Git fatal: Reference has invalid format: 'refs/heads/master
I am using Dropbox to sync a git repository, but now when I try and push I am getting an error:
8 Answers
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Set selected item of spinner programmatically
I am working on an android project and I am using a spinner which uses an array adapter which is populated from the database.
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Can I “multiply” a string (in C#)?
Suppose I have a string, for example,
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