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Generate a random alphanumeric string in Cocoa
...stringWithCapacity:20];
for (NSUInteger i = 0U; i < 20; i++) {
u_int32_t r = arc4random() % [alphabet length];
unichar c = [alphabet characterAtIndex:r];
[s appendFormat:@"%C", c];
}
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Swift: Pass array by reference?
...For Swift versions 3-4 (XCode 8-9), use
var arr = [1, 2, 3]
func addItem(_ localArr: inout [Int]) {
localArr.append(4)
}
addItem(&arr)
print(arr)
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How to get the number of characters in a std::string?
...u can handle rolling your own strlen as well. For wstring, u16string and u32string, it returns the number of characters, rather than bytes. (Again with the proviso that if you are using a variable-length encoding in any of those, you're going to have to roll your own strlen).
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Select SQL Server database size
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232
Try this one -
Query:
SELECT
database_name = DB_NAME(database_id)
, log_size_mb = ...
Why don't Java Generics support primitive types?
...all ...
– Stephen C
Mar 26 '12 at 1:32
22
Why can't the Java compiler also box the primitive type...
Why does Math.round(0.49999999999999994) return 1?
...arlesworth
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Dynamic array in C#
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John Saunders
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answered Feb 27 '09 at 13:59
Chris Van Opstal...
How to output MySQL query results in CSV format?
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Increasing the maximum number of TCP/IP connections in Linux
...ng used once).
Usual system defaults are:
net.ipv4.ip_local_port_range = 32768 61000
net.ipv4.tcp_fin_timeout = 60
This basically means your system cannot consistently guarantee more than (61000 - 32768) / 60 = 470 sockets per second. If you are not happy with that, you could begin with increa...
Removing Java 8 JDK from Mac
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And if you also want to see if the JDK is 32bit or 64bit, something along the lines of alias java_ls='/usr/libexec/java_home -V 2>&1 | sed "/^ \(.*\) \(.*\),/!d;/^\s*$/d;s/^ \(.*\) \(.*\), \(.*\):\(.*\)$/\2 (\3)/g"' will do.
– Moreaki
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