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Get average color of image via Javascript
...p;& canvas.getContext('2d'),
data, width, height,
i = -4,
length,
rgb = {r:0,g:0,b:0},
count = 0;
if (!context) {
return defaultRGB;
}
height = canvas.height = imgEl.naturalHeight || imgEl.offsetHeight || imgEl.height;
width = can...
bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...filename的值。
str()用来把字符串指针转换成字符串。
4. 进程的系统调用记数统计
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }'
Attaching 1 probe...
^C
@[bpftrace]: 6
@[systemd]: 24
@[snmp-pass]: 96
@[sshd]: 125
按Ctrl-C后打...
Why exactly is eval evil?
...e a macro that based on the first parameter uses either SIN or COS.
(foo 3 4) does (sin 4) and (foo 1 4) does (cos 4).
Now we may have:
(foo (+ 2 1) 4)
This does not give the desired result.
One then may want to repair the macro FOO by EVALuating the variable:
(defmacro foo (a b)
(list (if (eql (...
How to return PDF to browser in MVC?
... |
edited Aug 29 '16 at 14:24
Tomas Kubes
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a...
Reflection: How to Invoke Method with parameters
...
240
Change "methodInfo" to "classInstance", just like in the call with the null parameter array.
...
How do I return early from a rake task?
...
pupeno
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answered Feb 23 '10 at 7:56
Simone Carl...
Compiling with g++ using multiple cores
...nstances of itself in order to compile large projects quicker (for example 4 source files at a time for a multi-core CPU)?
...
MySQL with Node.js
...
427
Check out the node.js module list
node-mysql — A node.js module implementing the MySQL pro...