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Questions every good Java/Java EE Developer should be able to answer? [closed]
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community wiki
Jeff
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How to pass arguments to a Button command in Tkinter?
... so you can use that too):
button = Tk.Button(master=frame, text='press', command= lambda: action(someNumber))
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How can I pad a value with leading zeros?
What is the recommended way to zerofill a value in JavaScript? I imagine I could build a custom function to pad zeros on to a typecasted value, but I'm wondering if there is a more direct way to do this?
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How to run the sftp command with a password from Bash script?
...hpass -e sftp -oBatchMode=no -b - sftp-user@remote-host << !
cd incoming
put your-log-file.log
bye
!
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Java - escape string to prevent SQL injection
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How to loop through all the files in a directory in c # .net?
...iles and has some really nice tips, like filtering techniques etc.
http://www.codeproject.com/Tips/512208/Folder-Directory-Deep-Copy-including-sub-directori
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How to run travis-ci locally
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This process allows you to completely reproduce any Travis build job on your computer. Also, you can interrupt the process at any time and debug. Below is an example where I perfectly reproduce the results of job #191.1 on php-school/cli-menu
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Prereq...
How do I get user IP address in django?
... edited May 23 '17 at 10:31
Community♦
111 silver badge
answered Jan 3 '11 at 4:08
yanchenkoyanchenko
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Difference between break and continue statement
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102
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Group by multiple columns in dplyr, using string vector input
...oup_by_at(vars(one_of(columns))) %>%
summarize(Value = mean(value))
#compare plyr for reference
df2 <- plyr::ddply(data, columns, plyr::summarize, value=mean(value))
table(df1 == df2, useNA = 'ifany')
## TRUE
## 27
The output from your example question is as expected (see comparison to...