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MongoDB: How to query for records where field is null or not set?
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171
If the sent_at field is not there when its not set then:
db.emails.count({sent_at: {$exists: ...
How to read a single char from the console in Java (as the user types it)?
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edited Sep 16 '17 at 0:09
stkent
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Bootstrap NavBar with left, center or right aligned items
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10 Answers
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Active
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Maven: missing net.sf.json-lib
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271
Looking at the maven-central repo, you need to specify a classifier for this dependency.
Either ...
How do I run a simple bit of code in a new thread?
...an the GUI as it currently causes the form to freeze whilst the code runs (10 seconds or so).
15 Answers
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Set default syntax to different filetype in Sublime Text 2
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1601
In the current version of Sublime Text 2 (Build: 2139), you can set the syntax for all files ...
Create array of symbols
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The original answer was written back in September '11, but, starting from Ruby 2.0, there is a shorter way to create an array of symbols! This literal:
%i[address city state postal country]
will do exactly what you want.
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What is an SSTable?
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107
Sorted Strings Table (borrowed from google) is a file of key/value string pairs, sorted by key...
What does Provider in JAX-RS mean?
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139
Providers are a simply a way of extending and customizing the JAX-RS runtime. You can think of...