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The way to check a HDFS directory's size?
...ork (in Hadoop 2.7.1). For example:
Directory structure:
some_dir
├abc.txt
├count1.txt
├count2.txt
└def.txt
Assume each file is 1 KB in size. You can summarize the entire directory with:
hdfs dfs -du -s some_dir
4096 some_dir
However, if I want the sum of all files containin...
How to search and replace text in a file?
...t to the same file in a separate step.
# Read in the file
with open('file.txt', 'r') as file :
filedata = file.read()
# Replace the target string
filedata = filedata.replace('ram', 'abcd')
# Write the file out again
with open('file.txt', 'w') as file:
file.write(filedata)
Unless you've got ...
C# Sanitize File Name
... void CoerceValidFileName_SimpleValid()
{
var filename = @"thisIsValid.txt";
var result = PathHelper.CoerceValidFileName(filename);
Assert.AreEqual(filename, result);
}
[Test]
public void CoerceValidFileName_SimpleInvalid()
{
var filename = @"thisIsNotValid\3\\_3.txt";
var resul...
Copy file remotely with PowerShell
...t's much easier this way.
Copy-Item -Path \\serverb\c$\programs\temp\test.txt -Destination \\servera\c$\programs\temp\test.txt;
By using UNC paths instead of local filesystem paths, you help to
ensure that your script is executable from any client system with
access to those UNC paths. If...
Reading a plain text file in Java
... most cases):
BufferedReader br = new BufferedReader(new FileReader("file.txt"));
try {
StringBuilder sb = new StringBuilder();
String line = br.readLine();
while (line != null) {
sb.append(line);
sb.append(System.lineSeparator());
line = br.readLine();
}
...
How to return result of a SELECT inside a function in PostgreSQL?
...REATE OR REPLACE FUNCTION word_frequency(_max_tokens int)
RETURNS TABLE (txt text -- also visible as OUT parameter inside function
, cnt bigint
, ratio bigint) AS
$func$
BEGIN
RETURN QUERY
SELECT t.txt
, count(*) AS cnt -- column al...
When to use pip requirements file versus install_requires in setup.py?
...is means you should mirror setup.py install_requires= deps in requirements.txt?
– proppy
Sep 25 '13 at 23:24
...
How to find out what group a given user has?
.../\:/\,/g|tr -d ' '|sed -e "s/^/$HOSTNAME,/"> /tmp/"$HOSTNAME"_inventory.txt
sudo cat /etc/sudoers| grep -v "^#"|awk '{print $1}'|grep -v Defaults|sed '/^$/d;s/[[:blank:]]//g'>/tmp/"$HOSTNAME"_sudo.txt
paste -d , /tmp/"$HOSTNAME"_inventory.txt /tmp/"$HOSTNAME"_sudo.txt|sed 's/,[[:blank:]]*$//...
Identifying the dependency relationship for python packages installed with pip
... a hn thread, I'll recommend the following:
Have a commented requirements.txt file with your main dependencies:
## this is needed for whatever reason
package1
Install your dependencies: pip install -r requirements.txt.
Now you get the full list of your dependencies with pip freeze -r requireme...
Read a file one line at a time in node.js?
...tion processLineByLine() {
const fileStream = fs.createReadStream('input.txt');
const rl = readline.createInterface({
input: fileStream,
crlfDelay: Infinity
});
// Note: we use the crlfDelay option to recognize all instances of CR LF
// ('\r\n') in input.txt as a single line break...