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Makefile经典教程（入门必备） - C/C++ - 清泛网 - 专注C/C++及内核技术
...个变量，其值是一个空格，那么我们可以这样来：
nullstring :=
space := $(nullstring) # end of the line
nullstring 是一个Empty变量，其中什么也没有，而我们的space的值是一个空格。因为在操作符的右边是很难描述一个空格的，这里采...
Makefile经典教程（入门必备） - C/C++ - 清泛网 - 专注C/C++及内核技术
...个变量，其值是一个空格，那么我们可以这样来：
nullstring :=
space := $(nullstring) # end of the line
nullstring 是一个Empty变量，其中什么也没有，而我们的space的值是一个空格。因为在操作符的右边是很难描述一个空格的，这里采...
Makefile经典教程（入门必备） - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
...个变量，其值是一个空格，那么我们可以这样来：
nullstring :=
space := $(nullstring) # end of the line
nullstring 是一个Empty变量，其中什么也没有，而我们的space的值是一个空格。因为在操作符的右边是很难描述一个空格的，这里采...
What's the difference between a continuation and a callback?
...e of the tail call).
Bonus: Proceeding to continuation passing style. Consider the following program:
console.log(pythagoras(3, 4));
function pythagoras(x, y) {
return x * x + y * y;
}
Now if every operation (including addition, multiplication, etc.) were written in the form of...
File I/O in Every Programming Language [closed]
... to reopen the file before each operation. You can write the whole code inside one with block.
with open('fileio.txt', 'w+') as f:
f.write('hello')
f.write('\nworld')
s = f.readlines()[1]
print(s)
I used three with blocks to emphsize the difference between the three operations:
write ...
What would cause an algorithm to have O(log n) complexity?
...t a log term to show up in big-O notation. Here are a few:
Repeatedly dividing by a constant
Take any number n; say, 16. How many times can you divide n by two before you get a number less than or equal to one? For 16, we have that
16 / 2 = 8
8 / 2 = 4
4 / 2 = 2
2 / 2 = 1
Notice that this...
In what order are Panels the most efficient in terms of render time and performance?
...l to accommodate stretching using alignments (or Auto in the case of the Grid) and then the number of children which are stretched or auto-sized. The performance of the Arrange pass is affected by the complexity of the interaction between layout location of different children and then of course the...
Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
... 反汇编 -- objdump （这个工具基本上每个LINUX上都有）、lida( http://lida.sourceforge.net/ )
调试器 -- gdb
十六进制编辑器 -- hexedit
文本编辑器 -- vim
压缩工具 -- upx (http://upx.sourceforge.net)
计算器 -- gcalctool（gnome计算器...
Logical operators for boolean indexing in Pandas
...are designed to work with scalars. So Pandas had to do one better and override the bitwise operators to achieve vectorized (element-wise) version of this functionality.
So the following in python (exp1 and exp2 are expressions which evaluate to a boolean result)...
exp1 and exp2 # L...
Dynamically update values of a chartjs chart
...ft(); };
var optionsAnimation = {
//Boolean - If we want to override with a hard coded scale
scaleOverride : true,
//** Required if scaleOverride is true **
//Number - The number of steps in a hard coded scale
scaleSteps : 10,
//Number - The value jump in the hard coded...