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How do I check if the Java JDK is installed on Mac?
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190
javac -version in a terminal will do
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ggplot2 legend to bottom and horizontal
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147
If you want to move the position of the legend please use the following code:
library(reshap...
Why does javascript map function return undefined?
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187
You aren't returning anything in the case that the item is not a string. In that case, the fun...
XML schema or DTD for logback.xml?
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edited Jul 4 '17 at 10:25
answered Dec 24 '12 at 20:37
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How can I calculate the time between 2 Dates in typescript
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160
Use the getTime method to get the time in total milliseconds since 1970-01-01, and subtract th...
Is it correct to use JavaScript Array.sort() method for shuffling?
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12 Answers
12
Active
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How much size “Null” value takes in SQL Server
I have a large table with say 10 columns. 4 of them remains null most of the times. I have a query that does null value takes any size or no size in bytes. I read few articles some of them are saying :
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Extract subset of key-value pairs from Python dictionary object?
I have a big dictionary object that has several key value pairs (about 16), but I am only interested in 3 of them. What is the best way (shortest/efficient/most elegant) to achieve that?
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How to test an SQL Update statement before running it?
...e as the UPDATE.
So if you UPDATE is
UPDATE foo
SET bar = 42
WHERE col1 = 1
AND col2 = 'foobar';
The following will show you which rows will be updated:
SELECT *
FROM foo
WHERE col1 = 1
AND col2 = 'foobar';
shar...
Count number of days between two dates
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10 Answers
10
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