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Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
... empty tree value is formally defined in cache.h.
#define EMPTY_TREE_SHA1_HEX \
"4b825dc642cb6eb9a060e54bf8d69288fbee4904"
Since Git 2.16 (Q1 2018), it is used in a structure which is no longer tied to (only) SHA1, as seen in commit eb0ccfd:
Switch empty tree and blob lookups to use hash...
Is either GET or POST more secure than the other?
...?o??`o"FyVOByY_ Supo? /'i?Oi"4
tr'9/o_7too7q?c2Pv
(note: I converted the HEX to ASCII, some of it should obviously not be displayable)
The entire HTTP conversation is encrypted, the only visible portion of communication is on the TCP/IP layer (meaning the IP address and connection port informatio...
How to develop a soft keyboard for Android? [closed]
...true; // Consume touch event
}
});
// Disable spell check (hex strings look like words to Android)
edittext.setInputType(edittext.getInputType()
| InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);
}
}
// NOTE How can we change the background color of some keys (like the
// ...
'printf' vs. 'cout' in C++
... noise).
printf("0x%04x\n", 0x424);
std::cout << "0x" << std::hex << std::setfill('0') << std::setw(4) << 0x424 << std::endl;
Translation
This is where the real advantage of printf lies. The printf format string is well... a string. That makes it really easy t...
How to convert a number to string and vice versa in C++
...1.2 + 3 = 4.2"
You can use stream manipulators, such as std::endl, std::hex and functions std::setw(), std::setprecision() etc. with string streams in exactly the same manner as with cout
Do not confuse std::ostringstream with std::ostrstream. The latter is deprecated
Use boost lexical cast. If ...
Getting started with Haskell
...ain why entirely, and not clearly at all, and there's quite a bit of magic hex literals. You're just going through the motions. That wasn't the biggest issue for me tho, the biggest issue was that the book heavily depends on those kind of hard and long examples (long enough to take more than an enti...
Why does base64 encoding require padding if the input length is not divisible by 3?
... this paradigm. One byte is equal to one character in base256.
Base16, hexadecimal or hex, uses 4 bits for each character. One byte can represent two base16 characters.
Base64 does not fit evenly into the byte paradigm (nor does base32), unlike base256 and base16. All base64 characters can ...
Is there a unique Android device ID?
...Secure#ANDROID_ID returns the Android ID as an unique for each user 64-bit hex string.
import android.provider.Settings.Secure;
private String android_id = Secure.getString(getContext().getContentResolver(),
Secure.ANDROID_ID);
Also read Best...
What techniques can be used to speed up C++ compilation times?
...ommand the --radix=d lets you see the sizes in decimal numbers (default is hex). Now by looking at the largest symbol, identify if you can break the corresponding class and try to redesign it by factoring the non-templated parts in a base class, or by splitting the class into multiple classes.
Metho...
TLSF源码及算法介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...配请求，TLSF可以在限定的时间内完成分配。
碎片化程度低。
代码如下：
tlsf.h
/*
* Two Levels Segregate Fit memory allocator (TLSF)
* Version 2.4.6
*
* Written by Miguel Masmano Tello <mimastel@doctor.upv.es>
*
* Thanks to Ismael Ripoll for his suggestio...