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querySelector, wildcard element match?
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JaredMcAteerJaredMcAteer
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Call apply-like function on each row of dataframe with multiple arguments from each row
...y to a subset of the original data.
dat <- data.frame(x=c(1,2), y=c(3,4), z=c(5,6))
apply(dat[,c('x','z')], 1, function(x) sum(x) )
or if your function is just sum use the vectorized version:
rowSums(dat[,c('x','z')])
[1] 6 8
If you want to use testFunc
testFunc <- function(a, b) a +...
What is the difference between ELF files and bin files?
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4 Answers
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Instance variables vs. class variables in Python
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4 Answers
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Sending images using Http Post
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145
I'm going to assume that you know the path and filename of the image that you want to upload. A...
What's the best way to communicate between view controllers?
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Android TextWatcher.afterTextChanged vs TextWatcher.onTextChanged
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answered May 14 '11 at 18:03
MalcolmMalcolm
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Removing duplicate objects with Underscore for Javascript
....unique accepts a callback
var list = [{a:1,b:5},{a:1,c:5},{a:2},{a:3},{a:4},{a:3},{a:2}];
var uniqueList = _.uniq(list, function(item, key, a) {
return item.a;
});
// uniqueList = [Object {a=1, b=5}, Object {a=2}, Object {a=3}, Object {a=4}]
Notes:
Callback return value used for compari...
Why does the CheckBoxFor render an additional input tag, and how can I get the value using the FormC
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Have a look here:
http://forums.asp.net/t/1314753.aspx
This isn't a bug, and is in fact the same approach that both Ruby on
Rails and MonoRail use.
When you submit a form with a checkbox, the value is only posted if
the checkbox is checked. So, if you leave...
What's the difference between and
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104
<?> and <? extends Object> are synonymous, as you'd expect.
There are a few cases w...