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(Built-in) way in JavaScript to check if a string is a valid number
...is a string or number.
isNaN(num) // returns true if the variable does NOT contain a valid number
Examples
isNaN(123) // false
isNaN('123') // false
isNaN('1e10000') // false (This translates to Infinity, which is a number)
isNaN('foo') // true
isNaN('10px') //...
Network usage top/htop on Linux
...r subnet, like most tools do, it groups bandwidth by process.
NetHogs does not rely on a special kernel module to be loaded. If there's suddenly a lot of network traffic, you can fire up NetHogs and immediately see which PID is causing this. This makes it easy to identify programs that have gon...
Convert pem key to ssh-rsa format
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For future web-searchers, if this doesn't work for you, the comments in the original question worked for me.
– kristopolous
Oct 15 '15 at 19:36
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How to copy commits from one branch to another?
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As for why you might be unable to merge - Git merging does not play nice with git-svn. To copy a series of commits from one SVN branch to another, I ended up cherry-picking them and then performing an interactive rebase/reword to remove the incorrect git-svn-id references before...
Return value in a Bash function
...) captures the text sent to stdout by the command contained within. return does not output to stdout. $? contains the result code of the last command.
fun1 (){
return 34
}
fun2 (){
fun1
local res=$?
echo $res
}
sh...
TypeScript or JavaScript type casting
How does one handle type casting in TypeScript or Javascript?
3 Answers
3
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Getting the name of a variable as a string
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Somehow the function does not work in a loop: test = {} print(varname.nameof(test)) for i in [0]: print(varname.nameof(test)) The first print gives test, the print in the loop raises VarnameRetrievingError: Callee's node cannot be detected.
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My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets
...ash or Silverlight is that WebSockets are natively built into browsers and does not rely on plugins.
If by this you mean that you can use Java Applets, Flash, or Silverlight to establish a socket connection, then yes, that is possible. However you don't see that deployed in the real world too ofte...
Converting Symbols, Accent Letters to English Alphabet
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InCombiningDiacriticalMarks doesn't convert all cyrillics. For example Општина Богомила is untouched. It would be nice if one could convert it to Opstina Bogomila or something
– iwein
May 14 '10 at 1...
Can two applications listen to the same port?
...ocket before you bind(). However, this may not be what you want. What this does is an incoming TCP connection will be directed to one of the programs, not both, so it does not duplicate the connection, it just allows two programs to service the incoming request. For example, web servers will have mu...