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Writing outputs to log file and console
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exec 3>&1 1>>${LOG_FILE} 2>&1
would send stdout and stderr output into the log file, but would also leave you with fd 3 connected to the console, so you can do
echo "Some console message" 1>&3
to write a ...
Callback functions in Java
Is there a way to pass a call back function in a Java method?
17 Answers
17
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TimeStamp on file name using PowerShell
...PowerShell script code in a double-quoted string by using a subexpression, for example, $() like so:
"C:\temp\mybackup $(get-date -f yyyy-MM-dd).zip"
And if you are getting the path from somewhere else - already as a string:
$dirName = [io.path]::GetDirectoryName($path)
$filename = [io.path]::G...
Why compile Python code?
... by using pre-compiled code you can eliminate step 2, this applies python, PHP and others.
Heres an interesting blog post explaining the differences http://julipedia.blogspot.com/2004/07/compiled-vs-interpreted-languages.html
And here's an entry that explains the Python compile process http://effbo...
Check if a value is within a range of numbers
... don't need "multiple if" statements to do it, either:
if (x >= 0.001 && x <= 0.009) {
// something
}
You could write yourself a "between()" function:
function between(x, min, max) {
return x >= min && x <= max;
}
// ...
if (between(x, 0.001, 0.009)) {
// someth...
Saving utf-8 texts in json.dumps as UTF8, not as \u escape sequence
...ure_ascii=False switch to json.dumps(), then encode the value to UTF-8 manually:
>>> json_string = json.dumps("ברי צקלה", ensure_ascii=False).encode('utf8')
>>> json_string
b'"\xd7\x91\xd7\xa8\xd7\x99 \xd7\xa6\xd7\xa7\xd7\x9c\xd7\x94"'
>>> print(json_string.decode(...
Standardize data columns in R
I have a dataset called spam which contains 58 columns and approximately 3500 rows of data related to spam messages.
15 ...
Hidden features of Windows batch files
...neral ugliness of Windows command line, I see why Windows is mostly point & click :) Though they say that the new PowerShell is better.
– Halil Özgür
Feb 1 '12 at 8:37
a...
Properties file in python (similar to Java Properties)
...les may not include sections so this configParser doesn't seem reliable at all
– BiAiB
Jul 17 at 9:27
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How to fetch all Git branches
...lks: for /F %remote in ('git branch -r') do ( git branch --track %remote) && git fetch --all && git pull --all
– Max
Dec 20 '13 at 6:03
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