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Compare dates in MySQL
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That is SQL Server syntax for converting a date to a string. In MySQL you can use the DATE function to extract the date from a datetime:
SELECT *
FROM players
WHERE DATE(us_reg_date) BETWEEN '2000-07-05' AND '2011-11-10'
But if you want to take advanta...
jQuery posting JSON
...ype : 'POST',
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if you pass an object as settings.data jQuery will convert it to query parameters and by default send with the data type application/x-www-form-urlencoded; charset=UTF-8, probably not what you want
sh...
How to prevent Node.js from exiting while waiting for a callback?
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I guess he means that if the library has converted code that once was synchronous to a new asynchronous version, it's possible that the library creators forgot to queue the callbacks and the event queues get emptied somewhere in the middle of your execution, thus fi...
How can I make the computer beep in C#?
How do I make the computer's internal speaker beep in C# without external speakers?
6 Answers
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How to hide a View programmatically?
...e, but it still takes up space for layout purposes. Use with setVisibility(int) and android:visibility.
GONE
This view is invisible, and it doesn't take any space for layout purposes. Use with setVisibility(int) and android:visibility.
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Difference between constituency parser and dependency parser
...eterministic (rule-based) transformation on the constituency parse tree to convert it into a dependency tree.
More can be found here:
http://en.wikipedia.org/wiki/Phrase_structure_grammar
http://en.wikipedia.org/wiki/Dependency_grammar
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How to extract one column of a csv file
...}
' c=3 < <(dos2unix <textfile.csv)
Note the use of dos2unix to convert possible DOS style line breaks (CRLF i.e. "\r\n") and UTF-16 encoding (with byte order mark) to "\n" and UTF-8 (without byte order mark), respectively. Standard CSV files use CRLF as line break, see Wikipedia.
If the...
How is this fibonacci-function memoized?
... the exponential explosion. But with that trick, we set out a list for the interim results, and go "through the list":
fib n = (xs!!(n-1)) + (xs!!(n-2)) where xs = 0:1:map fib [2..]
The trick is to cause that list to get created, and cause that list not to go away (by way of garbage collection) b...
Reorder levels of a factor without changing order of values
...sapply(dtf, class)
numbers letters
"integer" "factor"
Now, if you convert this factor to numeric, you'll get:
# return underlying numerical values
1> with(dtf, as.numeric(letters))
[1] 1 2 3 4
# change levels
1> levels(dtf$letters) <- letters[4:1]
1> dtf
numbers letters
1 ...
JavaScript: How to find out if the user browser is Chrome?
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@vishalsharma, the !! converts the value to be either true or false. typeof(window.chrome) gives "object", whereas typeof(!!window.chrome) gives "boolean". Your code sample also works too because the if statement does the conversion.
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