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How to detect Safari, Chrome, IE, Firefox and Opera browser?
...bust, I switched to browser-specific characteristics:
Internet Explorer: JScript's Conditional compilation (up until IE9) and document.documentMode.
Edge: In Trident and Edge browsers, Microsoft's implementation exposes the StyleMedia constructor. Excluding Trident leaves us with Edge.
Edge (based ...
Is there a HTML opposite to ?
Is there a tag in HTML that will only display its content if JavaScript is enabled? I know <noscript> works the opposite way around, displaying its HTML content when JavaScript is turned off. But I would like to only display a form on a site if JavaScript is available, telling them why they ...
Serializing object that contains cyclic object value
...
much saver and it shows where an cycle object was.
<script>
var jsonify=function(o){
var seen=[];
var jso=JSON.stringify(o, function(k,v){
if (typeof v =='object') {
if ( !seen.indexOf(v) ) { return '__cycle__'; }
seen.push(v);
...
How to export collection to CSV in MongoDB?
...3.0.0-rc10 and later. It changes
Fields string `long:"fields" short:"f" description:"comma separated list of field names, e.g. -f name,age"`
to
Fields string `long:"fields" short:"f" description:"comma separated list of field names (required for exporting CSV) e.g. -f \"name,age\" "`
VERSION 3...
How do I list all cron jobs for all users?
Is there a command or an existing script that will let me view all of a *NIX system's scheduled cron jobs at once? I'd like it to include all of the user crontabs, as well as /etc/crontab , and whatever's in /etc/cron.d . It would also be nice to see the specific commands run by run-parts in /e...
Multiline bash commands in makefile
...sub-command is run in its own shell. This makes writing non-trivial shell scripts a little bit messy -- but it is possible! The solution is to consolidate your script into what make will consider a single sub-command (a single line).
Tips for writing shell scripts within makefiles:
Escape the s...
Batch script to delete files
I have a batch script as follows.
5 Answers
5
...
Simple argparse example wanted: 1 argument, 3 results
...it with argparse (with multiple args):
parser = argparse.ArgumentParser(description='Description of your program')
parser.add_argument('-f','--foo', help='Description for foo argument', required=True)
parser.add_argument('-b','--bar', help='Description for bar argument', required=True)
args = vars(...
Why {} + {} is NaN only on the client side? Why not in Node.js?
...h use V8.
Here is the basic pipe line of what happens when you eval a JavaScript command with Rhino in the Rhino shell.
The shell runs org.mozilla.javascript.tools.shell.main.
In turn, it calls this new IProxy(IProxy.EVAL_INLINE_SCRIPT); for example, if the code was passed directly with the inlin...
Map over object preserving keys
The map function in underscore.js, if called with a javascript object, returns an array of values mapped from the object's values.
...