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Is is possible to check if an object is already attached to a data context in Entity Framework?
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answered Nov 11 '09 at 15:54
joshcomleyjoshcomley
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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
...hese are legal:
h = { :$in => array }
h = { :'a.b' => 'c' }
h[:s] = 42
but these are not:
h = { $in: array }
h = { 'a.b': 'c' } # but this is okay in Ruby2.2+
h[s:] = 42
You can also use anything as a key with => so you can do this:
h = { C.new => 11 }
h = { 23 => 'pancakes hou...
How do I combine two data-frames based on two columns? [duplicate]
...final example given in the documentation:
x <- data.frame(k1=c(NA,NA,3,4,5), k2=c(1,NA,NA,4,5), data=1:5)
y <- data.frame(k1=c(NA,2,NA,4,5), k2=c(NA,NA,3,4,5), data=1:5)
merge(x, y, by=c("k1","k2")) # NA's match
This example was meant to demonstrate the use of incomparables, but it illustra...
Catching an exception while using a Python 'with' statement
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4 Answers
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How to convert a char array back to a string?
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edited Oct 4 '11 at 23:30
answered Oct 4 '11 at 23:24
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#1071 - Specified key was too long; max key length is 767 bytes
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34 Answers
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Default constructor vs. inline field initialization
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davindavin
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add a co...
How can I access a JavaScript object which has spaces in the object's key?
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234
Use ECMAscripts "bracket notation":
myTextOptions[ 'character names' ].kid;
You can use that ...
What does a script-Tag with src AND content mean?
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MySQL SELECT WHERE datetime matches day (and not necessarily time)
... of the time. Or in other words, if my table only contained the following 4 records, then only the 2nd and 3rd would be returned if I limit to 2012-12-25.
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