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Random alpha-numeric string in JavaScript? [duplicate]
...16, 'aA'));
console.log(randomString(32, '#aA'));
console.log(randomString(64, '#A!'));
Fiddle: http://jsfiddle.net/wSQBx/2/
Alternatively, to use the base36 method as described below you could do something like this:
function randomString(length) {
return Math.round((Math.pow(36, length + 1...
TCP: can two different sockets share a port?
..., unused high-order source port. This way, a single client can have up to ~64k connections to the server for the same destination port.
So, this is really what gets created when a client connects to a server:
Local Computer | Remote Computer | Role
-----------------------------...
When are you truly forced to use UUID as part of the design?
...n 4 UUID, even if you're generating quite a few UUIDs per second.
Also, 2^64 * 16 is 256 exabytes. As in, you would need to store 256 exabytes worth of IDs before you had a 50% chance of an ID collision in a single application space.
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How does the ARM architecture differ from x86? [closed]
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How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
...c/java_home -verbose
Matching Java Virtual Machines (3):
1.7.0_45, x86_64: "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home
1.7.0_09, x86_64: "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_09.jdk/Contents/Home
!1.8.0, x86_64: "Java SE 8" /Library/Ja...
How do you properly use namespaces in C++?
...mespace to all the code in your module. For example, for a module MyModule.dll, you could give its code the namespace MyModule. I've see elsewhere someone using MyCompany::MyProject::MyModule. I guess this is overkill, but all in all, it seems correct to me.
Using "using"
Using should be used with g...
How to request Administrator access inside a batch file
...This script is now slightly edited to support command line arguments and a 64 bit OS.
Thank you Eneerge @ https://sites.google.com/site/eneerge/scripts/batchgotadmin
@echo off
:: BatchGotAdmin
:-------------------------------------
REM --> Check for permissions
IF "%PROCESSOR_ARCHITECTURE...
Code signing certificate for open-source projects?
... valid code signing certificate, and it can be used to sign any code (MSI, DLL, XPI, ...) but not driver code (this requires EV).
To change an attribute on the certificate, the previous certificate must be revoked an a new one requested. Revocation of a certificate costs 29.90 $. Though when I ...
console.log timestamps in Chrome?
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70.0.3538.110 (Official Build) (64-bit) This answer once worked for me: i.e. console "gear icon"; "Show timestamps" checkmark ... but now I don't see "Show timestamps" in Chrome 70.0.3538.110 (Official Build) (64-bit) So I tried @tekiegirl's suggestion r...
Why do stacks typically grow downwards?
... written, so that it would know the actual RAM installed (e.g., a z80 with 64K address space didn't necessarily have 64K or RAM, in fact 64K would have been massive in my early days). Once it found the top actual address, it would set the stack pointer appropriately and could then start calling subr...