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Split column at delimiter in data frame [duplicate]
...
I added a "x|y" line to avoid ambiguities:
df <- data.frame(ID=11:13, FOO=c('a|b','b|c','x|y'))
foo <- data.frame(do.call('rbind', strsplit(as.character(df$FOO),'|',fixed=TRUE)))
Or, if you want to replace the columns in the existing data.frame:
within(df, FOO<-data.frame(do.call('rbin...
What does asterisk * mean in Python? [duplicate]
...e examples:
Example 1:
# Excess keyword argument (python 2) example:
def foo(a, b, c, **args):
print "a = %s" % (a,)
print "b = %s" % (b,)
print "c = %s" % (c,)
print args
foo(a="testa", d="excess", c="testc", b="testb", k="another_excess")
As you can see in the above example, w...
Understanding the map function
...call, comprehensions are faster? E.g. I was led to believe that map(lambda foo: foo.bar, my_list) is slower than foo.bar for foo in my_list, and that even map(operator.add, my_list_of_pairs) is slower than x + y for x, y in my_list_of_pairs, precisely because of the additional function call.
...
Properties file in python (similar to Java Properties)
... your properties in a python file, and use valid python (e.g: MEDIA_ROOT='/foo') ...
– danbgray
May 11 '12 at 21:19
3
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How do I modify fields inside the new PostgreSQL JSON datatype?
...n$;
Usage examples:
s1=# SELECT json_object_del_key ('{"hello":[7,3,1],"foo":{"mofu":"fuwa", "moe":"kyun"}}',
'foo'),
json_object_del_path('{"hello":[7,3,1],"foo":{"mofu":"fuwa", "moe":"kyun"}}',
'{"foo","moe"}');
jso...
Command not found when using sudo
I have a script called foo.sh in my home folder.
9 Answers
9
...
Passing variables through handlebars partial
...ens are replace in order.
USAGE: {{$ 'path.to.partial' context=newContext foo='bar' }}
USAGE: {{$ 'path.:1.:2' replaceOne replaceTwo foo='bar' }}
///////////////////////////////*/
Handlebars.registerHelper('$', function(partial) {
var values, opts, done, value, context;
if (!partial) {
...
Remove a symlink to a directory
...
# this works:
rm foo
# versus this, which doesn't:
rm foo/
Basically, you need to tell it to delete a file, not delete a directory. I believe the difference between rm and rmdir exists because of differences in the way the C library treats ...
What is this weird colon-member (“ : ”) syntax in the constructor?
...tax (ala: new String("Name")). It fits in with the constructor better than Foo(int num) : m_Count = 5. Not to mention that classes must be constructed at this point anyway, since it's initialized here. Foo(int num) : Bar = num, wouldn't compile right. It just seems weird seeing Foo(int num) : m_Coun...
What is the difference between String.Empty and “” (empty string)?
...) for String.Empty arguments. The following equivalent functions
string foo()
{
return "foo" + "";
}
string bar()
{
return "bar" + string.Empty;
}
generate this IL
.method private hidebysig instance string foo() cil managed
{
.maxstack 8
L_0000: ldstr "foo"
L_0005: ret
}
....