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Can the Unix list command 'ls' output numerical chmod permissions?
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it almost can ..
ls -l | awk '{k=0;for(i=0;i<=8;i++)k+=((substr($1,i+2,1)~/[rwx]/) \
*2^(8-i));if(k)printf("%0o ",k);print}'
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Read a zipped file as a pandas DataFrame
...long form:
df = pd.read_csv('filename.zip', compression='zip', header=0, sep=',', quotechar='"')
Description of the compression argument from the docs:
compression : {‘infer’, ‘gzip’, ‘bz2’, ‘zip’, ‘xz’, None}, default ‘infer’
For on-the-fly decompression of on-d...
When I catch an exception, how do I get the type, file, and line number?
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edited Feb 20 '13 at 18:51
David Cain
13.4k1010 gold badges6161 silver badges6868 bronze badges
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Better way to check variable for null or empty string?
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10 Answers
10
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How to count duplicate value in an array in javascript
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array_elements.sort();
var current = null;
var cnt = 0;
for (var i = 0; i < array_elements.length; i++) {
if (array_elements[i] != current) {
if (cnt > 0) {
document.write(current + ' comes --> ' + cnt + ' times<br>');
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UILabel - Wordwrap text
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302
If you set numberOfLines to 0 (and the label to word wrap), the label will automatically wrap a...
How can I String.Format a TimeSpan object with a custom format in .NET?
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250
Please note: this answer is for .Net 4.0 and above. If you want to format a TimeSpan in .Net 3....
error: ‘NULL’ was not declared in this scope
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answered Jan 20 '09 at 17:14
Johannes Schaub - litbJohannes Schaub - litb
453k112112 gold badges830830 silver badges11501150 bronze badges
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Large Numbers in Java
...a.math package.
Example:
BigInteger reallyBig = new BigInteger("1234567890123456890");
BigInteger notSoBig = new BigInteger("2743561234");
reallyBig = reallyBig.add(notSoBig);
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