大约有 1,000 项符合查询结果（耗时：0.0121秒） [XML]
Converting from IEnumerable to List [duplicate]
...example:
IEnumerable<string> stringEnumerable = null;
StringBuilder csv = new StringBuilder();
stringEnumerable.ToNonNullList().ForEach(str=> csv.Append(str).Append(","));
Here is the extension method:
public static List<T> ToNonNullList<T>(this IEnumerable<T> obj)
{
...
INSERT IF NOT EXISTS ELSE UPDATE?
...when the name and age are both the same?
– Arnaud Aliès
Sep 16 '16 at 8:35
This should be the solution... if you are ...
What is the difference between map and flatMap and a good use case for each?
... where is the number of elements of input and output are the same.
number.csv
1
2
3
-
4
-
5
map.py adds all numbers in add.csv.
from operator import *
def f(row):
try:
return float(row)
except Exception:
return 0
rdd = sc.textFile('a.csv').map(f)
print(rdd.count()) # 7
print...
Best/Most Comprehensive API for Stocks/Financial Data [closed]
...
Yahoo's api provides a CSV dump:
Example: http://finance.yahoo.com/d/quotes.csv?s=msft&f=price
I'm not sure if it is documented or not, but this code sample should showcase all of the features (namely the stat types [parameter f in the query ...
How do I retrieve the number of columns in a Pandas data frame?
...ction will give you result something like as below.
If you are using read_csv method of Pandas without sep parameter or sep with ",".
raw_data = pd.read_csv("a1:\aa2/aaa3/data.csv")
raw_data.info()
<class 'pandas.core.frame.DataFrame'>
RangeIndex: 5144 entries, 0 to 5143
Columns: 145 entries...
Align two inline-blocks left and right on same line
...
@ValerioColtrè I agree that the empty space is the most (and possibly, only!) annoying thing about this approach. Explicitly managing your font-size is rather undesirable. I propose a different solution. Note that the .header:after decor...
Best way to create unique token in Rails?
...ar to assert the unicity in this case.
– Thibaut Barrère
Apr 4 '12 at 8:41
1
For those looking f...
What is wrong with using goto? [duplicate]
...d but a break who serve the same purpose
– David Doumèche
Oct 7 '15 at 7:34
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Delete the first three rows of a dataframe in pandas
...
inp0= pd.read_csv("bank_marketing_updated_v1.csv",skiprows=2)
or if you want to do in existing dataframe
simply do following command
share
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...
Bootstrap Element 100% Width
...I'll still use your solution I think).
– Thibaut Barrère
Oct 25 '14 at 9:35
Its worth noting though that container-fl...