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Adding code to a javascript function programmatically
...s call it.
So if this is the original...
someFunction = function() {
alert("done");
}
You'd do this...
someFunction = (function() {
var cached_function = someFunction;
return function() {
// your code
var result = cached_function.apply(this, arguments); // use .app...
How can I quickly sum all numbers in a file?
...
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...
How do I debug Node.js applications?
... as part of the Google Chrome Developer Tools can be used to debug Node.js scripts. A detailed explanation of how this works can be found in the Node.js GitHub wiki.
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How to change Elasticsearch max memory size
...re referred to some previous distribution.
On Debian 8 modify the service script normally place in /usr/lib/systemd/system/elasticsearch.service, and add Environment=ES_HEAP_SIZE=8G
just below the other "Environment=*" lines.
Now reload the service script with systemctl daemon-reload and restart ...
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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How to redirect and append both stdout and stderr to a file with Bash?
...a file opened in append mode. In other words, the &1 reuses the file descriptor which stdout currently uses.
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Get div height with plain JavaScript
...
jsFiddle
var element = document.getElementById('element');
alert(element.offsetHeight);
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How do you 'redo' changes after 'undo' with Emacs?
...ntuitive. This should be in the default packages. One comment: I wish some alert message was also shown when redoing from a branch point, not just when reverting to it. For example, when user calls a redo: 'Redoing from a branch point' or 'Default redo branch used' - just to alert the user that ther...
Deleting all files in a directory with Python
...
Via os.listdir and os.remove:
import os
filelist = [ f for f in os.listdir(mydir) if f.endswith(".bak") ]
for f in filelist:
os.remove(os.path.join(mydir, f))
Or via glob.glob:
import glob, os, os.path
filelist = glob.g...
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());
});
...