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Insert a row to pandas dataframe
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Just assign row to a particular index, using loc:
df.loc[-1] = [2, 3, 4] # adding a row
df.index = df.index + 1 # shifting index
df = df.sort_index() # sorting by index
And you get, as desired:
A B C
0 2 3 4
1 5 6 7
2 7 8 9
See in Pandas documentation Indexing: Se...
How can I break an outer loop with PHP?
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274
In the case of 2 nested loops:
break 2;
http://php.net/manual/en/control-structures.break.p...
Python argparse: default value or specified value
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286
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--example', nargs='?',...
How to get correct timestamp in C#
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edited Sep 26 '14 at 7:05
answered Jan 19 '14 at 17:05
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How to quit scala 2.11.0 REPL?
In the last version of scala (2.10.3) REPL, I can type exit to quit from REPL. However, in Scala 2.11.0 this doesn't work.
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Initializing a member array in constructor initializer
...tly to fire off list initialization
struct A {
int foo[3];
A():foo{1, 2, 3} { }
A():foo({1, 2, 3}) { } /* invalid */
};
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How to match a String against string literals in Rust?
... => println!("0"),
"b" => println!("1"),
"c" => println!("2"),
_ => println!("something else!"),
}
There's also an as_str method as of Rust 1.7.0:
match stringthing.as_str() {
"a" => println!("0"),
"b" => println!("1"),
"c" => println!("2"),
_ =>...
how do you filter pandas dataframes by multiple columns
... sub-statements with ():
males = df[(df[Gender]=='Male') & (df[Year]==2014)]
To store your dataframes in a dict using a for loop:
from collections import defaultdict
dic={}
for g in ['male', 'female']:
dic[g]=defaultdict(dict)
for y in [2013, 2014]:
dic[g][y]=df[(df[Gender]==g) &...
Ruby Array find_first object?
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203
Either I don't understand your question, or Enumerable#find is the thing you were looking for....
how to get the current working directory's absolute path from irb
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521
Dir.pwd seems to do the trick.
http://ruby-doc.org/core/Dir.html#method-c-pwd
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