大约有 47,000 项符合查询结果（耗时：0.0613秒） [XML]
How to remove last n characters from every element in the R vector
...ld not find a simple example online of how to remove the last n characters from every element of a vector (array?)
5 Answe...
Git “error: The branch 'x' is not fully merged”
Here are the commands I used from the master branch
11 Answers
11
...
Run single test from a JUnit class using command-line
I am trying to find an approach that will allow me to run a single test from a JUnit class using only command-line and java.
...
How to get month name from Calendar
...December"};
return monthNames[month];
}
The number you pass in comes from a Calendar.MONTH call.
share
|
improve this answer
|
follow
|
...
How do I load a file from resource folder?
... great, I'm so stupid that I was using Object.class.getClassLoader();, from a static context which didn't work - this suggestion does - well almost, it injects %20 for spaces which gives me a FileNotFoundException
– ycomp
Mar 7 '16 at 20:03
...
Merge PDF files
... that works with both versions.
#!/usr/bin/env python
import sys
try:
from PyPDF2 import PdfFileReader, PdfFileWriter
except ImportError:
from pyPdf import PdfFileReader, PdfFileWriter
def pdf_cat(input_files, output_stream):
input_streams = []
try:
# First open all the fil...
Leading zeros for Int in Swift
...ed.
The following Playground code shows how to create a String formatted from Int with at least two integer digits by using init(format:_:):
import Foundation
let string0 = String(format: "%02d", 0) // returns "00"
let string1 = String(format: "%02d", 1) // returns "01"
let string2 = String(form...
How do you read a file into a list in Python? [duplicate]
... list in python (note these are not either or) -
use of with - supported from python 2.5 and above
use of list comprehensions
1. use of with
This is the pythonic way of opening and reading files.
#Sample 1 - elucidating each step but not memory efficient
lines = []
with open("C:\name\MyDocume...
Difference between
...above possible assignments, what type of object are you guaranteed to read from List foo3:
You can read a Number because any of the lists that could be assigned to foo3 contain a Number or a subclass of Number.
You can't read an Integer because foo3 could be pointing at a List<Double>.
You c...
How do I manage MongoDB connections in a Node.js web application?
....
So, to answer your question directly, reuse the db object that results from MongoClient.connect(). This gives you pooling, and will provide a noticeable speed increase as compared with opening/closing connections on each db action.
...