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How can I check if string contains characters & whitespace, not just whitespace?
...to see if there's at least one character of non whitespace:
if (/\S/.test(myString)) {
// string is not empty and not just whitespace
}
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fo...
Highlight label if checkbox is checked
...l" id="idinput" />
<label class="label-for-check" for="idinput">My Label</label>
</div>
you can do
.check-with-label:checked + .label-for-check {
font-weight: bold;
}
See this working. Note that this won't work in non-modern browsers.
...
What is the largest Safe UDP Packet Size on the Internet
...nfinite amount of possibilities making delivery unreliable such as dog ate my network cable. That said; having less fragments makes delivery "safer" because if there were more than one and any one of those never made it - the whole packet (datagram) is dropped by UDP.
– markmnl...
How to view file history in Git?
...
My favorite is git log -p <filename>, which will give you a history of all the commits of the given file as well as the diffs for each commit.
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ping response “Request timed out.” vs “Destination Host unreachable”
... Thanks @sanderd17, in case anyone else lands here I figured it out: My Linux server was configured with an Ethernet interface with static IP (which I pulled the cable out of once wifi was working) and a Wireless interface that was actually connected. Because of the static IP the Linux server ...
What's the difference between utf8_general_ci and utf8_unicode_ci?
...ncoding. The differences are in how text is sorted and compared.
Note: In MySQL you have to use utf8mb4 rather than utf8. Confusingly, utf8 is a flawed UTF-8 implementation from early MySQL versions which remains only for backward compatibility. The fixed version was given the name utf8mb4.
Note: N...
Grouping functions (tapply, by, aggregate) and the *apply family
...user-defined function to apply:
# Append ! to string, otherwise increment
myFun <- function(x){
if(is.character(x)){
return(paste(x,"!",sep=""))
}
else{
return(x + 1)
}
}
#A nested list structure
l <- list(a = list(a1 = "Boo", b1 = 2, c1 = "Eeek"),
b = ...
How to redirect output of an entire shell script within the script itself?
...g everything into a log file
main_function 2>&1 >> /var/log/my_uber_script.log
else
# run via terminal, only output to screen
main_function
fi
Alternatively, you may log everything into logfile each run and still output it to stdout by simply doing:
# log everything, but also o...
Design patterns to avoid [closed]
...
Patterns are complex
All design patterns should be used with care. In my opinion you should refactor towards patterns when there is a valid reason to do so instead of implementing a pattern right away. The general problem with using patterns is that they add complexity. Overuse of patterns make...
ActiveMQ or RabbitMQ or ZeroMQ or [closed]
...
Edit: My initial answer had a strong focus on AMQP. I decided to rewrite it to offer a wider view on the topic.
These 3 messaging technologies have different approaches on building distributed systems :
RabbitMQ is one of the lea...