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Is ASCII code 7-bit or 8-bit?
...thods such as MIME, UUcoding and BinHex. This mean that the 8-bit has been converted to a 7-bit characters, which adds extra bytes to encode them.
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How to declare an ArrayList with values? [duplicate]
...n, in the order they are returned by the collection's iterator.
ArrayList(int initialCapacity)
Constructs an empty list with the specified initial capacity.
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How to encrypt/decrypt data in php?
... using BINARY or VARBINARY columns. If this is not an option, you can also convert the binary data into a textual representation using base64_encode() or bin2hex(), doing so requires between 33% to 100% more storage space.
Decryption
Decryption of the stored values is similar:
function pkcs7_unpa...
What is the difference between native code, machine code and assembly code?
...ds and executes directly. All other code must be translated or transformed into machine code before your machine can execute it.
Native code: This term is sometimes used in places where machine code (see above) is meant. However, it is also sometimes used to mean unmanaged code (see below).
Unmana...
All permutations of a Windows license key
...*kwargs. When using format you can not pass the tuple directly but need to convert it to arguments first: map(lambda args: 'MPP6R-09RXG-2H{}MT-{}K{}M9-V{}C8R'.format(*args), product('8B', 'B8', 'HN', '6G')). I still use the old % string formatting a lot for sentimental reasons. I really should consi...
How to solve Operator '!=' cannot be applied to operands of type 'T' and 'T' [duplicate]
This code snippet works as expected for the int type:
3 Answers
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boost::filesystem指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
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#include<iostream>
#include<fstream>
#include<boost/filesystem.hpp>
int main()
{
namespace bf=boost::filesystem;//简单别名
//filesystem中最基本的类型
bf::path path("/tmp/test");
//对当前的目录的操作
bf::path old_cpath=bf::c...
Creating an object: with or without `new` [duplicate]
...e simplest way to create an object, and is just the same as when you write int x = 0;
The second creates an object with dynamic storage duration and allows two things:
Fine control over the lifetime of the object, since it does not go out of scope automatically; you must destroy it explicitly usi...
In Java, when should I create a checked exception, and when should it be a runtime exception? [dupli
... For example, if I'm passing up from my persistence layer, I would like to convert an SQL exception to a persistence exception, since the next layer up shouldn't care that I'm persisting to a SQL database, but will want to know if something could not be persisted. Another technique I use is to crea...
best practice to generate random token for forgot password
...eference. I prefer to do all crypto operations on raw binary and only ever convert to hex/base64 for transmission or storage.
– Scott Arciszewski
Dec 18 '15 at 18:56
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