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How to convert a string to an integer in JavaScript?
...use the native Number function:
var x = Number("1000")
If that doesn't work for you, then there are the parseInt, unary plus, parseFloat with floor, and Math.round methods.
parseInt:
var x = parseInt("1000", 10); // you want to use radix 10
// so you get a decimal number even with a leading...
When are you truly forced to use UUID as part of the design?
...
I wrote the UUID generator/parser for Ruby, so I consider myself to be reasonably well-informed on the subject. There are four major UUID versions:
Version 4 UUIDs are essentially just 16 bytes of randomness pulled from a cryptographically secure r...
What does it mean when an HTTP request returns status code 0?
What does it mean when JavaScript network calls such as fetch or XMLHttpRequest, or any other type of HTTP network request, fail with an HTTP status code of 0?
...
Automatic prune with Git fetch or pull
If someone deleted a remote branch because the work is over and I don't know, I won't do a git fetch --prune and eventually I will push back the deleted branch.
...
What does !! mean in ruby?
...nvention stand.
Think of it as
!(!some_val)
One thing that is it used for legitimately is preventing a huge chunk of data from being returned. For example you probably don't want to return 3MB of image data in your has_image? method, or you may not want to return your entire user object in the ...
Should I use alias or alias_method?
...e redefined if need be. (it's defined in the Module class.)
alias's behavior changes depending on its scope and can be quite unpredictable at times.
Verdict: Use alias_method - it gives you a ton more flexibility.
Usage:
def foo
"foo"
end
alias_method :baz, :foo
...
Overloading Macro on Number of Arguments
...__VA_ARGS__, FOO3, FOO2)(__VA_ARGS__)
So if you have these macros:
FOO(World, !) # expands to FOO2(World, !)
FOO(foo,bar,baz) # expands to FOO3(foo,bar,baz)
If you want a fourth one:
#define GET_MACRO(_1,_2,_3,_4,NAME,...) NAME
#define FOO(...) GET_MACRO(__VA_ARGS__, FOO4, FOO3, F...
Wrapping a C library in Python: C, Cython or ctypes?
...
ctypes is your best bet for getting it done quickly, and it's a pleasure to work with as you're still writing Python!
I recently wrapped an FTDI driver for communicating with a USB chip using ctypes and it was great. I had it all done and working i...
How are everyday machines programmed?
...aditional sense. Most of the time the software is written in C, assembly, or even machine code. C and ASM require compilers to be written to use them for that platform. Machine code is written as binary w/o a compiler.
Your coffee pot and most simple systems like that don't carry an operating ...
Should I use single or double colon notation for pseudo-elements?
Since IE7 and IE8 don't support the double-colon notation for pseudo-elements (e.g. ::after or ::first-letter ), and since modern browsers support the single-colon notation (e.g. :after ) for backwards compatibility, should I use solely the single-colon notation and when IE8's market share drops...