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How do I rename the extension for a bunch of files?
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123
This worked for me on OSX from .txt to .txt_bak
find . -name '*.txt' -exec sh -c 'mv "$0" "${...
How do you remove all the options of a select box and then add one option and select it with jQuery?
.../attr/text like: .append($("<option></option>").attr("value", '123').text('ABC!')
– Brock Hensley
Jun 27 '13 at 21:58
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JavaScript style for optional callbacks
...swered Mar 31 '14 at 11:16
ninja123ninja123
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Can I change the height of an image in CSS :before/:after pseudo-elements?
...nswered Jan 23 '12 at 21:39
user123444555621user123444555621
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Open Facebook page from Android app?
...ered May 14 '16 at 21:40
Someguy123Someguy123
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Strangest language feature
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Or, more usefully, "0123456789abcdef"[x & 0xf]
– Dipstick
Jan 3 '10 at 15:33
17
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Get last n lines of a file, similar to tail
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123
This may be quicker than yours. Makes no assumptions about line length. Backs through the fi...
Dynamically select data frame columns using $ and a character value
...is a reproducible example below:
# set seed for reproducibility
set.seed(123)
df <- data.frame( col1 = sample(5,10,repl=T) , col2 = sample(5,10,repl=T) , col3 = sample(5,10,repl=T) )
# We want to sort by 'col3' then by 'col1'
sort_list <- c("col3","col1")
# Use 'do.call' to call order. S...
Fastest Way to Serve a File Using PHP
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@Keyne I don't think you can. tn123.org/mod_xsendfile does not list .htaccess in the context for the XSendFilePath option
– cheshirekow
May 30 '12 at 20:49
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C# code to validate email address
...e all perfectly valid forms:
cog@wheel
"cogwheel the orange"@example.com
123@$.xyz
For most use cases, a false "invalid" is much worse for your users and future proofing than a false "valid". Here's an article that used to be the accepted answer to this question (that answer has since been delet...