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R programming: How do I get Euler's number?
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150
The R expression
exp(1)
represents e, and
exp(2)
represents e^2.
This works because exp i...
How do I get the current date in JavaScript?
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var today = new Date();
var dd = String(today.getDate()).padStart(2, '0');
var mm = String(today.getMonth() + 1).padStart(2, '0'); //January is 0!
var yyyy = today.getFullYear();
today = mm + '/' + dd + '/' + yyyy;
document.write(today);
This will give you today's date in the forma...
Take a char input from the Scanner
...take the first character from Scanner.next:
char c = reader.next().charAt(0);
To consume exactly one character you could use:
char c = reader.findInLine(".").charAt(0);
To consume strictly one character you could use:
char c = reader.next(".").charAt(0);
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Declaring and initializing variables within Java switches
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answered May 30 '12 at 6:12
Jon SkeetJon Skeet
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Get the first N elements of an array?
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370
Use array_slice()
This is an example from the PHP manual: array_slice
$input = array("a", "...
How to get the unix timestamp in C#
...estamp in C# by using DateTime.UtcNow and subtracting the epoch time of 1970-01-01.
e.g.
Int32 unixTimestamp = (Int32)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
DateTime.UtcNow can be replaced with any DateTime object that you would like to get the unix timestamp for.
Th...
How can I programmatically get the MAC address of an iphone
...tIPAddresses();
GetHWAddresses();
int i;
NSString *deviceIP = nil;
for (i=0; i<MAXADDRS; ++i)
{
static unsigned long localHost = 0x7F000001; // 127.0.0.1
unsigned long theAddr;
theAddr = ip_addrs[i];
if (theAddr == 0) break;
if (theAddr == localHost) continue;
N...
Xcode doesn't show the line that causes a crash
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301
You should also ensure that you have breakpoints set for all exceptions. This will cause Xcode...
How are cookies passed in the HTTP protocol?
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302
The server sends the following in its response header to set a cookie field.
Set-Cookie:name=v...
Objective-C Split()?
...it strings in objective c into arrays? I mean like this - input string Yes:0:42:value into an array of (Yes,0,42,value)?
5 ...