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How can I trim leading and trailing white space?
...le the trailing white spaces when you read your data file. If you use read.csv or read.table you can set the parameterstrip.white=TRUE.
If you want to clean strings afterwards you could use one of these functions:
# Returns string without leading white space
trim.leading <- function (x) sub("^\\...
代码块超过1.2w编译apk报错问题 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...译过程报错：
RequestTooLargeError 可能指的是事务任务列表的大小以及数据存储实体的大小，
不能超过 1 MB。您要添加的任务加上数据的总大小是多少？https://community.appinventor.mi ... g-ai2-locally/61743accept:
*/*
accept-encoding:
gzip, de...
Windbg Step 2 分析程序堆栈实战 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...*tol*给所有含有tol的函数都设置断点；
然后用bl查看断点列表，用bc 2-6 清除，用bd 2-6禁用 第二个到6个断点
2. lm查看loaded Modules
lm
start end module name
01330000 0134b000 MyApp C (private pdb symbols) E:\ProLab\WindbgFirst\Debug\MyApp.pdb
...
SQL - Update multiple records in one query
...
Also, it's a great way to turn a little bit of CSV (or a lot) into a table insert/update/upsert with some minor text editing!
– wulftone
Dec 8 '16 at 5:23
...
Extracting an attribute value with beautifulsoup
... can also use this :
import requests
from bs4 import BeautifulSoup
import csv
url = "http://58.68.130.147/"
r = requests.get(url)
data = r.text
soup = BeautifulSoup(data, "html.parser")
get_details = soup.find_all("input", attrs={"name":"stainfo"})
for val in get_details:
get_val = val["valu...
How do I use spaces in the Command Prompt?
...\workspace\Map Checker Unit Test\MAP_CHECK_TMP\#Test Case\testcase_results.csv"" -l "C:\Program Files (x86)\Jenkins\workspace\Map Checker Unit Test\MAP_CHECK_TMP" -restore" . can help?
– hafizan
Jul 7 at 9:04
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Creating a Pandas DataFrame from a Numpy array: How do I specify the index column and column headers
...o a DataFrame is there not some "shortcut"? This is basically the way that csvs are loaded - and can be managed by the default handling for many csv readers. An analogous structure for df's would be useful.
– javadba
Nov 17 '18 at 20:26
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unix - head AND tail of file
...ine and the rest differently in one pipe, which is useful for working with CSV data:
{ echo N; seq 3;} | { tee >(head -n1 | sed 's/$/*2/' >&3; cat >/dev/null) | tail -n+2 | awk '{print $1*2}'; } 3>&1
N*2
2
4
6
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Web scraping with Python [closed]
...nload images, creates thumbnails and export the extracted data directly to csv or json.
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Create a .txt file if doesn't exist, and if it does append a new line
... needed, but how can i make the new content start on a new line? I'm using CSV files.
– NiallUK
Apr 22 at 14:28
I gues...