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Why I can't change directories using “cd”?
I'm trying to write a small script to change the current directory to my project directory:
31 Answers
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Is there a common Java utility to break a list into batches?
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Tagir ValeevTagir Valeev
81.5k1414 gold badges185185 silver badges289289 bronze badges
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CMake output/build directory
I'm pretty new to CMake, and read a few tutorials on how to use it, and wrote some complicated 50 lines of CMake script in order to make a program for 3 different compilers. This probably concludes all my knowledge in CMake.
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How to check if a folder exists
I am playing a bit with the new Java 7 IO features, actually I trying to receive all the xml files of a folder. But this throws an exception when the folder does not exist, how can I check if the folder exists with the new IO?
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Get all directories within directory nodejs
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Here's a shorter, syncronous version of this answer that can list all directories (hidden or not) in the current directory:
const { lstatSync, readdirSync } = require('fs')
const { join } = require('path')
const isDirectory = source => lstatSync(source).isDirectory()
const getDirectories =...
How to get the Power of some Integer in Swift language?
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GoZonerGoZoner
56.3k1818 gold badges8484 silver badges134134 bronze badges
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Copy multiple files in Python
...ectory into the destination directory (I'm assuming you don't want any sub-directories copied).
import os
import shutil
src_files = os.listdir(src)
for file_name in src_files:
full_file_name = os.path.join(src, file_name)
if os.path.isfile(full_file_name):
shutil.copy(full_file_name...
Get list from pandas DataFrame column headers
...fastest:
In [1]: %timeit [column for column in df]
1000 loops, best of 3: 81.6 µs per loop
In [2]: %timeit df.columns.values.tolist()
10000 loops, best of 3: 16.1 µs per loop
In [3]: %timeit list(df)
10000 loops, best of 3: 44.9 µs per loop
In [4]: % timeit list(df.columns.values)
10000 loops...
Python list directory, subdirectory, and files
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Just in case... Getting all files in the directory and subdirectories matching some pattern (*.py for example):
import os
from fnmatch import fnmatch
root = '/some/directory'
pattern = "*.py"
for path, subdirs, files in os.walk(root):
for name in files:
if fnmatch(nam...
Change Name of Import in Java, or import two classes with the same name
...erested, you can find a JEP draft here: https://gist.github.com/cardil/b29a81efd64a09585076fe00e3d34de7
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