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In R, how to get an object's name after it is sent to a function?
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Note that for print methods the behavior can be different.
print.foo=function(x){ print(deparse(substitute(x))) }
test = list(a=1, b=2)
class(test)="foo"
#this shows "test" as expected
print(test)
#this (just typing 'test' on the R command line)
test
#shows
#"structure(list(a = 1, b = 2),...
Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
This is an interview question from google. I am not able to solve it by myself. Can somebody shed some light?
14 Answers
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jQuery - Create hidden form element on the fly
...r second question:
$('<input>').attr({
type: 'hidden',
id: 'foo',
name: 'bar'
}).appendTo('form');
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How do I link to part of a page? (hash?)
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If there is an <a name="foo"> tag or any tag with an id (e.g., <div id="foo">), then you can simply append #foo to the URL. Otherwise, you can't arbitrarily link to portions of a page.
Here's a complete example: <a href="http://example...
PHP Foreach Pass by Reference: Last Element Duplicating? (Bug?)
... the new value.
So loop 1, the value and $arr[2] become $arr[0], which is 'foo'.
Loop 2, the value and $arr[2] become $arr[1], which is 'bar'.
Loop 3, the value and $arr[2] become $arr[2], which is 'bar' (because of loop 2).
The value 'baz' is actually lost at the first call of the second foreach lo...
How to implement Enums in Ruby?
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Two ways. Symbols (:foo notation) or constants (FOO notation).
Symbols are appropriate when you want to enhance readability without littering code with literal strings.
postal_code[:minnesota] = "MN"
postal_code[:new_york] = "NY"
Constants a...
How to sort two lists (which reference each other) in the exact same way
Say I have two lists:
13 Answers
13
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Hibernate Criteria returns children multiple times with FetchType.EAGER
I have an Order class that has a list of OrderTransactions and I mapped it with a one-to-many Hibernate mapping like so:
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Merge, update, and pull Git branches without using checkouts
...sourceBranch>:<destinationBranch>
Examples:
# Merge local branch foo into local branch master,
# without having to checkout master first.
# Here `.` means to use the local repository as the "remote":
git fetch . foo:master
# Merge remote branch origin/foo into local branch foo,
# without ...
Forced naming of parameters in Python
...meters and
may only be passed used keyword arguments.
>>> def foo(pos, *, forcenamed):
... print(pos, forcenamed)
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>>> foo(pos=10, forcenamed=20)
10 20
>>> foo(10, forcenamed=20)
10 20
>>> foo(10, 20)
Traceback (most recent call last):
File "<stdin&...