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mongodb group values by multiple fields
...urse the ability to interpolate the variable through $expr using $match to select the matching items in the "join", but the general premise is a "pipeline within a pipeline" where the inner content can be filtered by matches from the parent. Since they are both "pipelines" themselves we can $limit e...
Good MapReduce examples [closed]
...erations that you can do in MapReduce is the set of normal SQL operations: SELECT, SELECT WHERE, GROUP BY, ect.
Another good example is matrix multiply, where you pass one row of M and the entire vector x and compute one element of M * x.
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Turn a number into star rating display using jQuery and CSS
...jsbin.com/IBIDalEn/2/edit (P.S. removed unneeded stuff in JS, minified CSS selectors and used max-width).
– Roko C. Buljan
Dec 13 '13 at 4:06
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How do I force a UITextView to scroll to the top every time I change the text?
...tion:0, length:0, worked. My text view was not editable, and I tested both selectable and not selectable (neither setting affected the result). Here's a Swift example:
myTextView.text = "Text that is long enough to scroll"
myTextView.scrollRangeToVisible(NSRange(location:0, length:0))
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DateTime2 vs DateTime in SQL Server
...= '5/5/2010 23:59:59.999'
declare @d3 datetime = '5/5/2010 23:59:59.997'
select @d1 as 'IAmMay6BecauseOfRounding', @d2 'May5', @d3 'StillMay5Because2msEarlier'
Avoiding this implicit rounding is a significant reason to move to DateTime2. Implicit rounding of dates clearly causes confusion:
St...
Twitter bootstrap scrollable table
...able;
table-layout: fixed;
}
table{
height:300px; // <-- Select the height of the table
display: -moz-groupbox; // Firefox Bad Effect
}
tbody{
overflow-y: scroll;
height: 200px; // <-- Select the height of the body
width: 100%;
position: absolute;
}...
Rails: Default sort order for a rails model?
...hen it gets used for actions like where's limiting (filtering) the default selection (a bad idea for a default) rather than just being used for ordering results.
For where selections, just use the regular named scopes. and add that scope on in the query, e.g. Book.all.published where published is a ...
How to use the “required” attribute with a “radio” input field
...buttons they must all have the same name value. This allows only one to be selected at a time and applies required to the whole group.
<form>
Select Gender:<br>
<label>
<input type="radio" name="gender" value="male" required>
Male
</label><b...
How to disable HTML button using JavaScript?
...erence to the element collected through whatever means you like (e.g. querySelector)
– Quentin
Jun 27 '16 at 21:04
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What is the difference between partitioning and bucketing a table in Hive ?
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Interesting, I agree w.r.t the usage in select query. But wondered why people are using clustered by and sorted by together in table creation statement. If there is no significance to SORTED BY in DDL, then why this keyword is present? Didnt get that.
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