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Get selected text from a drop-down list (select box) using jQuery
...
This works for me
$("#dropdownid").change(function() {
alert($(this).find("option:selected").text());
});
If the element created dynamically
$(document).on("change", "#dropdownid", function() {
alert($(this).find("option:selected").text());
});
...
Quit and restart a clean R session from within R?
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This solution works but is not reproducible when my script is run by others. Is there a command to be included in R script to restart R session? (the reason being I want all packages to be detached)
– Heisenberg
Oct 19 '14 at 20:04
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socket.error: [Errno 48] Address already in use
...do the same thing for other utilities, it may be more convenient as a bash script:
#!/usr/bin/env bash
MIN_PORT=${1:-1025}
MAX_PORT=${2:-65535}
(netstat -atn | awk '{printf "%s\n%s\n", $4, $4}' | grep -oE '[0-9]*$'; seq "$MIN_PORT" "$MAX_PORT") | sort -R | head -n 1
Set that up as a executable ...
What's the difference between String(value) vs value.toString()
...ethod unavailable:
o.valueOf = null;
try {
String(o);
} catch (e) {
alert(e); // TypeError
}
If you want to know more about this mechanism I would recommend looking at the ToPrimitive and the ToString internal operations.
I also recommend reading this article:
Object-to-Primitive Convers...
Add 10 seconds to a Date
...ndle wrap-around cases:
var d;
d = new Date('2014-01-01 10:11:55');
alert(d.getMinutes() + ':' + d.getSeconds()); //11:55
d.setSeconds(d.getSeconds() + 10);
alert(d.getMinutes() + ':0' + d.getSeconds()); //12:05
...
How to add and get Header values in WebApi
...ername': 'test','password':'123' },
success: function (data) {
alert(data);
},
failure: function (result) {
alert('Error: ' + result);
}
});
Hope this helps someone ...
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How can I quickly sum all numbers in a file?
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Your awk script should execute a bit faster if you use $0 instead of $1 since awk does field splitting (which obviously takes time) if any field is specifically mentioned in the script but doesn't otherwise.
– Ed...
Using the HTML5 “required” attribute for a group of checkboxes?
... @Clijsters the question is about a HTML5 way to do it - not with Javascript (of course, various solutions are possible in Javascript)
– Zabba
Apr 10 '18 at 0:18
7
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jQuery get value of selected radio button
...:checked.
$(function(){
$("#submit").click(function() {
alert($("input[name=q12_3]:checked").val());
});
});
Note that the above code is not the same as using
.is(":checked").
jQuery's is()
function returns a boolean (true or false) and not an
element.
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Detecting Windows or Linux? [duplicate]
...he commons lang has a class SystemUtils.java
you can use :
SystemUtils.IS_OS_LINUX
SystemUtils.IS_OS_WINDOWS
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