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JavaScript: Passing parameters to a callback function
...e callback function
//only when we have some missing value
//get this data from ajax or compute
var extraParam = "this data was missing" ;
//call the callback when we have the data
callback(extraParam);
}
// test function
callbackTester (function(k) {
tryMe("hello", "goodbye", k);
});
...
Parsing command-line arguments in C?
...parse command line arguments in C are:
Getopt (#include <unistd.h> from the POSIX C Library), which can solve simple argument parsing tasks. If you're a bit familiar with bash, the getopt built-in of bash is based on Getopt from the GNU libc.
Argp (#include <argp.h> from the GNU C Libr...
PyPy — How can it possibly beat CPython?
From the Google Open Source Blog :
4 Answers
4
...
How do I load a file from resource folder?
... great, I'm so stupid that I was using Object.class.getClassLoader();, from a static context which didn't work - this suggestion does - well almost, it injects %20 for spaces which gives me a FileNotFoundException
– ycomp
Mar 7 '16 at 20:03
...
Does Python's time.time() return the local or UTC timestamp?
...563265.81
>>> import datetime
>>> st = datetime.datetime.fromtimestamp(ts).strftime('%Y-%m-%d %H:%M:%S')
>>> print st
2012-12-15 01:21:05
>>>
The ts variable is the time returned in seconds. I then converted it to a string using the datetime library making it a...
Single Line Nested For Loops
...ften faster than using a for loop.
Look at this longer list comprehension from the tutorial (the if part filters the comprehension, only parts that pass the if statement are passed into the final part of the list comprehension (here (x,y)):
>>> [(x, y) for x in [1,2,3] for y in [3,1,4] if...
How do I use Node.js Crypto to create a HMAC-SHA1 hash?
... And to verify a hash, you should use crypto.timingSafeEqual(Buffer.from(a), Buffer.from(b)): stackoverflow.com/questions/31095905/…
– baptx
Aug 2 '19 at 15:19
1
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How do I resolve “Cannot find module” error using Node.js?
After pulling down a module from GitHub and following the instructions to build it, I try pulling it into an existing project using:
...
CSS3 box-sizing: margin-box; Why not?
... FF 53.0.3) is that its behaviour is not analogous with that of width: X%; From what we can see "calc" is done at time of initial rendering to a static Xpx. This means that unlike width: X%, the calc'ed column does not resize automatically with container resize.
– Pancho
...
How to pass a class type as a function parameter
...types and even have an inheritance hierarchy (that is, if class B inherits from A, then B.Type also inherits from A.Type):
class A {}
class B: A {}
class C {}
// B inherits from A
let object: A = B()
// B.Type also inherits from A.Type
let type: A.Type = B.self
// Error: 'C' is not a subtype of ...