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MongoDB aggregation framework match OR
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Make Adobe fonts work with CSS3 @font-face in IE9
...o get rid of the "CSS3114" error. For an online tool, click here: https://www.andrebacklund.com/fontfixer.html
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Assign pandas dataframe column dtypes
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When to use in vs ref vs out
... this yourtube video which demonstrates the difference practically https://www.youtube.com/watch?v=lYdcY5zulXA
Below image shows the differences more visually
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Converting Python dict to kwargs?
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What are the differences between git remote prune, git prune, git fetch --prune, etc
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Is it valid to have a tag inside another tag?
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What is the dual table in Oracle?
...unction in a select statement:
e.g. select sysdate from dual;
See http://www.adp-gmbh.ch/ora/misc/dual.html
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Convert string to a variable name
...
There is another simple solution found there:
http://www.r-bloggers.com/converting-a-string-to-a-variable-name-on-the-fly-and-vice-versa-in-r/
To convert a string to a variable:
x <- 42
eval(parse(text = "x"))
[1] 42
And the opposite:
x <- 42
deparse(substitute(x))
[...
Why are two different concepts both called “heap”?
...inding available memory allocation. The following is excerpted from http://www.cprogramming.com/tutorial/virtual_memory_and_heaps.html.
When new is invoked, it starts looking for a free memory block that fits the size for your request. Supposing that such a block of memory is found, it is marked...