大约有 6,000 项符合查询结果（耗时：0.0225秒） [XML]
Batch file: Find if substring is in string (not in a file)
...
When this is run in CMD.EXE, we get:
C:\DemoDev>y pqrs "abc def pqr 123"
got one - pattern not found
C:\DemoDev>y pqr "abc def pqr 123"
got zero - found pattern
share
|
improve this a...
Test if characters are in a string
...# Correct
> grepl("1+2", "1+2", fixed=TRUE)
[1] TRUE
> grepl("1+2", "123+456", fixed=TRUE)
[1] FALSE
# Incorrect
> grepl("1+2", "1+2")
[1] FALSE
> grepl("1+2", "123+456")
[1] TRUE
Interpretation
grep is named after the linux executable, which is itself an acronym of "Global Regular...
Test if executable exists in Python?
...
Easiest way I can think of:
def which(program):
import os
def is_exe(fpath):
return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
fpath, fname = os.path.split(program)
if fpath:
if is_exe(program):
return program
else:
fo...
Regex Email validation
...ht, fail to catch at least two invalid formats: "Abc.@example.com" , "Abc..123@example.com"
– sean717
Aug 22 '12 at 5:22
...
How to set environment variables in Python?
...
Environment variables must be strings, so use
os.environ["DEBUSSY"] = "1"
to set the variable DEBUSSY to the string 1.
To access this variable later, simply use:
print(os.environ["DEBUSSY"])
Child processes automatically inherit the environment variables of the par...
Using os.walk() to recursively traverse directories in Python
...
This will give you the desired result
#!/usr/bin/python
import os
# traverse root directory, and list directories as dirs and files as files
for root, dirs, files in os.walk("."):
path = root.split(os.sep)
print((len(path) - 1) * '---', os.path.basename(root))
for file in fi...
Scheduling recurring task in Android
...k stackoverflow.com/questions/27872016/…
– dowjones123
Jan 10 '15 at 2:07
For simple things - like checking state ev...
Detecting Windows or Linux? [duplicate]
...he commons lang has a class SystemUtils.java
you can use :
SystemUtils.IS_OS_LINUX
SystemUtils.IS_OS_WINDOWS
share
|
improve this answer
|
follow
|
...
Build an ASCII chart of the most commonly used words in a given text [closed]
...
123
votes
LabVIEW 51 nodes, 5 structures, 10 diagrams
Teaching the elephant to tap-d...
Deleting all files in a directory with Python
...
Via os.listdir and os.remove:
import os
filelist = [ f for f in os.listdir(mydir) if f.endswith(".bak") ]
for f in filelist:
os.remove(os.path.join(mydir, f))
Or via glob.glob:
import glob, os, os.path
filelist = glob.g...