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How to extract text from a PDF? [closed]
...hat I had to import - luckily no images. Ghostscript worked for me:
gswin64c -sDEVICE=txtwrite -o output.txt input.pdf
The output file was split into pages with headers, etc., but it was then easy to write an app to strip out blank lines, etc, and suck in all 30,000 records. -dSIMPLE and -dCOMPLE...
How many random elements before MD5 produces collisions?
.... To have a 50% chance of any hash colliding with any other hash you need 264 hashes. This means that to get a collision, on average, you'll need to hash 6 billion files per second for 100 years.
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ctypes - Beginner
...t_array = lib.print_array
py_print_array.argtypes = [ctl.ndpointer(np.float64,
flags='aligned, c_contiguous'),
ctypes.c_int]
A = np.array([1.4,2.6,3.0], dtype=np.float64)
py_print_array(A, 3)
where we specify the array, the first...
What is better, adjacency lists or adjacency matrices for graph problems in C++?
... a list takes up more memory than a matrix:
8e > n2/8 when d > 1/64
So with these numbers (still 32-bit specific) the breakpoint lands at 1/64.
If the density (e/n2) is bigger than 1/64, then a matrix is preferable if you want to save memory.
You can read about this at wikipedia (artic...
How to get root access on Android emulator?
...oel G Mathew
4,6541111 gold badges3939 silver badges6464 bronze badges
answered Jun 10 '17 at 12:40
xavier_fakeratxavier_fakerat
1...
一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
...多少字节可以一次性传输到对方）。
* MTU 交换是为了在主从双方设置一个PDU中最大能够交换的数据量，通过MTU的交换和双方确认（注意这个MTU是不可以协商的，只是通知对方，双方在知道对方的极限后会选择一个较小...
0.1 float is greater than 0.1 double. I expected it to be false [duplicate]
...id. This difference can and does actually occur, because x86 does not use 64-bits for its internal floating-point computations; it actually uses 80-bits! This is called double extended-precision.
So, even among just x86 compilers, it sometimes happen that the same number is represented two differ...
C++虚继承的概念 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的问题。
class 派生类名：virtual 继承方式 基类名
virtual是关键字，声明该基类为派生类的虚基类。
在多继承情况下，虚基类关键字的作用范围和继承方式关键字相同，只对紧跟其后的基类起作用。
声明了虚基类之后，虚基...
The name 'model' does not exist in current context in MVC3
...ystem.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
<namespaces>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespac...
How to format a number as percentage in R?
...
# [1] "0.00%" "0.01%" "0.04%" "0.09%" "0.16%" "0.25%" "0.36%" "0.49%" "0.64%"
# [10] "0.81%" "1.00%"
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