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Factors in R: more than an annoyance?
...es and hate apples but don't mind grapes I don't need to manage some weird index to say so:
d <- data.frame(x = rnorm(20), f = sample(c("apples", "oranges", "grapes"), 20, replace = TRUE, prob = c(0.5, 0.25, 0.25)))
d$f <- ordered(d$f, c("apples", "grapes", "oranges"))
d[d$f >= "grapes", ...
How to prevent XSS with HTML/PHP?
...Js,Css,and consider put untrusted HTML into HTML. Look at this : owasp.org/index.php/…
– bronze man
May 29 '14 at 17:43
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show 1 more comm...
Insert new column into table in sqlite?
...
don't forget to re-create indexes
– Jan Turoň
Apr 6 '14 at 23:20
5
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How to find a Java Memory Leak
...://www.eclipse.org/mat/ .
What is really cool about this tool is that it indexed the heap dump when I first opened it which allowed it to show data like retained heap without waiting 5 minutes for each object (pretty much all operations were tons faster than the other tools I tried).
When you ope...
String formatting in Python 3
...next positional argument, with default format;
{0} means the argument with index 0, with default format;
{:d} is the next positional argument, with decimal integer format;
{0:d} is the argument with index 0, with decimal integer format.
There are many others things you can do when selecting an arg...
Class method decorator with self arguments?
...def countdown_decorator(func):
def func_wrapper():
for index in reversed(range(1, number+1)):
print("{}".format(index))
func()
return func_wrapper
return countdown_decorator
class MySuperClass():
def __init__(self, number):
sel...
What is the correct way to represent null XML elements?
...lor">Blue</anotherAttribute>
</BuildAttributes>
<Index></Index>
<pages>
<page pageNumber="1">Content</page>
</pages>
<!--Missing ISBN number could be confusing and misguiding since its not present-->
<...
How to convert a string or integer to binary in Ruby?
...= x.to_s(2)
}
lookup_table[5]
=> "101"
lookup_table["8"]
=> "1000"
Indexing into this hash table using either the integer or string representation of a number will yield its binary representation as a string.
If you require the binary strings to be a certain number of digits long (keep lead...
How to Deep clone in javascript
...ray]") {
result = [];
item.forEach(function(child, index, array) {
result[index] = clone( child );
});
} else if (typeof item == "object") {
// testing that this is DOM
if (item.nodeType && typeof item.clone...
What are file descriptors, explained in simple terms?
...you can get same FD number in 2 different processes because it returns the index of fdtable which is per-process. Thanks for bringing it up!!
– Tayyab
Jan 19 '16 at 21:45
...