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Renaming columns in pandas
...he .columns attribute:
>>> df = pd.DataFrame({'$a':[1,2], '$b': [10,20]})
>>> df.columns = ['a', 'b']
>>> df
a b
0 1 10
1 2 20
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Ruby Bundle Symbol not found: _SSLv2_client_method (LoadError)
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How to fix Array indexOf() in JavaScript for Internet Explorer browsers
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Return first match of Ruby regex
...Name[/regular expression/]. This is an example output from irb:
irb(main):003:0> names = "erik kalle johan anders erik kalle johan anders"
=> "erik kalle johan anders erik kalle johan anders"
irb(main):004:0> names[/kalle/]
=> "kalle"
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Difference between no-cache and must-revalidate
...t the response becomes stale right away.
If a response is cacheable for 10 seconds, then must-revalidate kicks in after 10 seconds, whereas no-cache implies must-revalidate after 0 seconds.
At least, that's my interpretation.
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Email validation using jQuery
...ld javascript for that:
function isEmail(email) {
var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;
return regex.test(email);
}
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Truncate a list to a given number of elements
What method truncates a list--for example to the first 100 elements--discarding the others (without iterating through individual elements)?
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How to completely remove borders from HTML table
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<table cellspacing="0" cellpadding="0">
And in css:
table {border: none;}
EDIT:
As iGEL noted, this solution is officially deprecated (still works though), so if you are starting from scratch, you should go with the jnpcl's border-colla...
Combining two Series into a DataFrame in pandas
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In [4]: pd.concat([s1, s2], axis=1).reset_index()
Out[4]:
index s1 s2
0 A 1 3
1 B 2 4
Note: This extends to more than 2 Series.
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Detect if stdin is a terminal or pipe?
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140
Use isatty:
#include <stdio.h>
#include <io.h>
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if (isatty(fileno(stdin)))
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