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print call stack in C or C++
...0901-stacktrace-demangled/
https://gist.github.com/fmela/591333/c64f4eb86037bb237862a8283df70cdfc25f01d3
Tested on Ubuntu 16.04, GCC 6.4.0, libc 2.23.
glibc backtrace_symbols_fd
This helper is a bit more convenient than backtrace_symbols, and produces basically identical output:
/* Paste this o...
How to generate keyboard events in Python?
... : 0x79,
'f1' : 0x7A,
'left' : 0x7B,
'right' : 0x7C,
'down' : 0x7D,
'up' : 0x7E
}
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How does git compute file hashes?
... "blob $(printf "$s" | wc -c)\0$s" | sha1sum
Output:
f2ba8f84ab5c1bce84a7b441cb1959cfc7093b7f
f2ba8f84ab5c1bce84a7b441cb1959cfc7093b7f -
where sha1sum is in GNU Coreutils.
Then it comes down to understanding the format of each object type. We have already covered the trivial blob, here are th...
Why does Java switch on contiguous ints appear to run faster with added cases?
... ;*new ; - javaapplication4.Test1::multiplyByPowerOfTen@202 (line 96)
; {runtime_call}
0x000000000287fe54: int3 ;*new ; - javaapplication4.Test1::multiplyByPowerOfTen@202 (line 96)
0x000000000287fe55: mulsd xmm0,QW...
How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
...3,183,234,323,797,142,810,155,862,553,705,570,600,021,649,944,369,726,123,996,534,870,137,000,784,980,673,984,909,570,977,377,882,585,701
Exponent: 65,537
The question then becomes how do we want to store these numbers in a computer. First we convert both to hexadecimal:
Modulus: EB506399F5C612F...
Can two different strings generate the same MD5 hash code?
...ery similar binary message in hex string:
$ echo '4dc968ff0ee35c209572d4777b721587d36fa7b21bdc56b74a3dc0783e7b9518afbfa200a8284bf36e8e4b55b35f427593d849676da0d1555d8360fb5f07fea2' | xxd -r -p | tee >/dev/null >(md5) >(sha1sum)
c6b384c4968b28812b676b49d40c09f8af4ed4cc -
008ee33a9d58b51cfeb...
Convert .pem to .crt and .key
...509 -outform der -in certificate.pem -out certificate.der
Convert PEM to P7B
openssl crl2pkcs7 -nocrl -certfile certificate.cer -out certificate.p7b -certfile CACert.cer
Convert PEM to PFX
openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile CACert.crt
...
List comprehension rebinds names even after scope of comprehension. Is this right?
...6, 87: 87, 88: 88, 89: 89, 90: 90, 91: 91, 92: 92, 93: 93, 94: 94, 95: 95, 96: 96, 97: 97, 98: 98, 99: 99}
>>> x
9
However it has been fixed in 3 as noted above.
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Mercurial move changes to a new branch
...
| summary: my new feature: edit file a
|
o changeset: 1:8bdc4508ac7b
| summary: my new feature: add file b
|
o changeset: 0:d554afd54164
summary: initial
This means, revision 0 is the base on which you started to work on your feature. Now you want to have revisions 1-2 on a...
What is :: (double colon) in Python when subscripting sequences?
... [80, 81, 82, 83, 84, 85, 86, 87, 88, 89],
[90, 91, 92, 93, 94, 95, 96, 97, 98, 99]])
Say for some reason, your boss wants you to select the following elements:
"But How???"... Read on! (We can do this in a 2-step approach)
Step 1 - Obtain subset
Specify the "start index" and "end index" in...