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Oracle: how to UPSERT (update or insert into a table?)
The UPSERT operation either updates or inserts a row in a table, depending if the table already has a row that matches the data:
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Add regression line equation and R^2 on graph
...5XMA
lm_eqn <- function(df){
m <- lm(y ~ x, df);
eq <- substitute(italic(y) == a + b %.% italic(x)*","~~italic(r)^2~"="~r2,
list(a = format(unname(coef(m)[1]), digits = 2),
b = format(unname(coef(m)[2]), digits = 2),
r2 = format(summary(m)$r.squ...
Set multiple properties in a List ForEach()?
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All you need to do is introduce some brackets so that your anonymous method can support multiple lines:
list.ForEach(i => { i.a = "hello!"; i.b = 99; });
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Fastest way to convert JavaScript NodeList to Array?
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The second one tends to be faster in some browsers, but the main point is that you have to use it because the first one is just not cross-browser. Even though The Times They Are a-Changin'
@kangax (IE 9 preview)
Array.prototype.slice can now co...
What are the dark corners of Vim your mom never told you about? [closed]
There are a plethora of questions where people talk about common tricks, notably " Vim+ctags tips and tricks ".
70 Answers
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Import package.* vs import package.SpecificType [duplicate]
... specific type (i.e. import java.lang.ClassLoader )? Would the second one be a more advisable way to use than the other one?
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How to see the changes between two commits without commits in-between?
How do you make git diff only show the difference between two commits, excluding the other commits in-between?
12 Answers...
Check if object is a jQuery object
Is there a fast way of checking if an object is a jQuery object or a native JavaScript object?
9 Answers
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Is there a foreach in MATLAB? If so, how does it behave if the underlying data changes?
Is there a foreach structure in MATLAB? If so, what happens if the underlying data changes (i.e. if objects are added to the set)?
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What is a plain English explanation of “Big O” notation?
I'd prefer as little formal definition as possible and simple mathematics.
41 Answers
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