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Meaning of = delete after function declaration
... class in a hierarchy is typically
a disaster: given only a pointer to a base, we simply don’t know what
members the derived class has, so we can’t know how to copy
them. So, the best thing to do is usually to delete the default copy
and move operations, that is, to eliminate the default...
How many random elements before MD5 produces collisions?
...n separate directories. I use this to store user files in separate folders based on their user ID in S3.
For example: "mybucket/users/1234/somefile.jpg". It's not exactly the same as a directory in a file system, but the S3 API has some features that let it work almost the same. I can ask it to li...
user authentication libraries for node.js?
...ucceeds or fails.
For example, here is the two-step process to setup form-based (username and password) authentication:
passport.use(new LocalStrategy(
function(username, password, done) {
// Find the user from your DB (MongoDB, CouchDB, other...)
User.findOne({ username: username, passw...
Random alpha-numeric string in JavaScript? [duplicate]
...'#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) - Math.random() * Math.pow(36, length))).toString(36).slice(1);
}
...
Which version of Python do I have installed?
... -v command, since it tells architecture of the installed python (32bit or 64bit)
– Abouzar Nouri
Jan 10 '17 at 12:28
1
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Array.Copy vs Buffer.BlockCopy
...
Since the parameters to Buffer.BlockCopy are byte-based rather than index-based, you're more likely to screw up your code than if you use Array.Copy, so I would only use Buffer.BlockCopy in a performance-critical section of my code.
...
How do I convert NSInteger to NSString datatype?
...gers are not objects, you cast them to long, in order to match the current 64-bit architectures' definition:
NSString *inStr = [NSString stringWithFormat: @"%ld", (long)month];
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Long vs Integer, long vs int, what to use and when?
...Object form of long, and Integer is the object form of int.
The long uses 64 bits. The int uses 32 bits, and so can only hold numbers up to ±2 billion (-231 to +231-1).
You should use long and int, except where you need to make use of methods inherited from Object, such as hashcode. Java.util.col...
How to determine why visual studio might be skipping projects when building a solution
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If the confixguration is x64 and the x64 compiler isn't installed it will skip the project.
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How to convert an int value to string in Go?
...sting to note that strconv.Itoa is shorthand for
func FormatInt(i int64, base int) string
with base 10
For Example:
strconv.Itoa(123)
is equivalent to
strconv.FormatInt(int64(123), 10)
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