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Drop unused factor levels in a subsetted data frame
...columns in a dataframe, you can use:
subdf <- subset(df, numbers <= 3)
subdf[] <- lapply(subdf, function(x) if(is.factor(x)) factor(x) else x)
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The 'Access-Control-Allow-Origin' header contains multiple values
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53
I added
config.EnableCors(new EnableCorsAttribute(Properties.Settings.Default.Cors, "", ""))
a...
PreparedStatement with list of parameters in a IN clause [duplicate]
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tom
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answered Jun 24 '10 at 3:34
OscarRyzOscarRyz
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Correctly determine if date string is a valid date in that format
... Originally written by Glavić.]
Test cases:
var_dump(validateDate('2013-13-01')); // false
var_dump(validateDate('20132-13-01')); // false
var_dump(validateDate('2013-11-32')); // false
var_dump(validateDate('2012-2-25')); // false
var_dump(validateDate('2013-12-01')); // true
var_dump(val...
Convert String to Calendar Object in Java
I am new to Java, usually work with PHP.
8 Answers
8
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POST JSON fails with 415 Unsupported media type, Spring 3 mvc
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edited May 23 '17 at 11:47
Community♦
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answered Jul 18 '12 at 20:24
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Colorized grep — viewing the entire file with highlighted matches
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813
Here are some ways to do it:
grep --color -E 'pattern|$' file
grep --color 'pattern\|$' file
eg...
Create nice column output in python
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data = [['a', 'b', 'c'], ['aaaaaaaaaa', 'b', 'c'], ['a', 'bbbbbbbbbb', 'c']]
col_width = max(le...
How to make a chain of function decorators?
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edited Apr 3 '19 at 16:23
Hondros
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answered Apr 11 '0...
How to crop an image using C#?
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answered Apr 9 '09 at 16:23
Daniel LeCheminantDaniel LeCheminant
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