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techniques for obscuring sensitive strings in C++
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But, if you just want to make sure the key doesn't show up when running strings on your binary, you could for instance make sure that the key is not within the printable range.
Obscuring key with XOR
For instance, you could use XOR to split the key into two byte arrays:
key = key1 XOR key2
I...
Is there a REAL performance difference between INT and VARCHAR primary keys?
... ($i = 0; $i < 1000; $i++) {
$val .= '("' . generate_random_string() . '", ' . rand (0, 10000) . ', "' . ($keys[rand(0, 9)]) . '"),';
}
$val = rtrim($val, ',');
$pdo->query('INSERT INTO jan_char VALUES ' . $val);
}
echo "\n" . ($k + 1) . ' millon(s) ...
How expensive is RTTI?
...endl;
Standard RTTI is expensive because it relies on doing a underlying string compare and thus the speed of RTTI can vary depending on the class name length.
The reason why string compares are used is to make it work consistently across library/DLL boundaries. If you build your application stat...
Get the current time in C
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any idea how to do the other way round? string to tm* ?
– Goaler444
Mar 23 '13 at 13:46
6
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UnicodeEncodeError: 'latin-1' codec can't encode character
...aracter to be used. You should also ideally tell MySQL you are using UTF-8 strings (by setting the database connection and the collation on string columns), so it can get case-insensitive comparison and sorting right.
share
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Best way to simulate “group by” from bash?
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People looking for "group by" with string concatenation instead of number addition would replace arr[$1,$2]+=$3+$4 with e.g. arr[$1,$2]=(arr[$1,$2] $3 "," $4). I needed this to provide a grouped-by-package list of files (two columns only) and used: arr[$1]=(ar...
What does {0} mean when initializing an object?
...0} will not work. Ex: struct A { B b; int i; char c; }; struct B { B(); B(string); }; A a = {}; // this statement cannot be rewritten as 'A a = {0}'.
– Aaron
Sep 23 '08 at 15:45
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What linux shell command returns a part of a string? [duplicate]
I want to find a linux command that can return a part of the string. In most programming languages, it's the substr() function. Does bash have any command that can be used for this purpose. I want to be able to do something like this...
substr "abcdefg" 2 3 - prints cde .
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Remote debugging with Android emulator
... make each windows system as much of a thin-client as possible without any extra services (such as sshd) or firewall holes.
So here is the senario:
System-A: Windows7 system with android emulator running
System-B: Ubuntu server with SDK installed
The problem as described earlier is that the emu...
Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
...pher_init' differ in signedness digestmd5.c:3125: note: expected 'unsigned char *' but argument is of type 'char *' digestmd5.c: In function 'digestmd5_client_mech_step1': digestmd5.c:3712: warning: pointer targets in passing argument 2 of '_plug_strdup' differ in signedness plugin_common.h:147: not...