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Change date format in a Java string
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514
Use LocalDateTime#parse() (or ZonedDateTime#parse() if the string happens to contain a time zone...
How do I convert a String object into a Hash object?
...ct.new}, then its string representation is "{:a=>#<Object:0x7f66b65cf4d0>}", and I can't use eval to turn it back into a hash because #<Object:0x7f66b65cf4d0> isn't valid Ruby syntax.
However, if all that's in the hash is strings, symbols, numbers, and arrays, it should work, because...
How can I use “sizeof” in a preprocessor macro?
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edited Jan 4 '19 at 14:42
Henrik Juul Pedersen
12344 bronze badges
answered Aug 29 '13 at...
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 (...
Tab Vs Space preferences in Vim
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answered Oct 20 '09 at 19:44
nelstromnelstrom
16.5k1212 gold badges5050 silver badges6363 bronze badges
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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...
Avoiding if statement inside a for loop?
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4 Answers
4
Active
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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...
Remove local git tags that are no longer on the remote repository
...ags origin
That returns a list of hashes and friendly tag names, like:
94bf6de8315d9a7b22385e86e1f5add9183bcb3c refs/tags/v0.1.3
cc047da6604bdd9a0e5ecbba3375ba6f09eed09d refs/tags/v0.1.4
...
2f2e45bedf67dedb8d1dc0d02612345ee5c893f2 refs/tags/v0.5.4
You could certainly put t...