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What does “Could not find or load main class” mean?
...n the classpath, then the JVM wouldn't be able to find the class.
Reason #2b - the subdirectory path doesn't match the FQN
If your classes FQN is com.acme.example.Foon, then the JVM is going to look for "Foon.class" in the directory "com/acme/example":
If your directory structure doesn't match t...
When do you use map vs flatMap in RxJava?
...age errors with RX can be found at: https://gist.github.com/daschl/db9fcc9d2b932115b679
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Homebrew install specific version of formula?
... https://github.com/Homebrew/homebrew-versions
9.3.2 git checkout 3c86d2b Library/Formula/postgresql.rb
9.3.1 git checkout a267a3e Library/Formula/postgresql.rb
9.3.0 git checkout ae59e09 Library/Formula/postgresql.rb
9.2.4 git checkout e3ac215 Library/Formula/postgresql.rb
9.2.3 git...
深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...[0x2a]=64-Bit Interrupt Gate target=0x0010:fffff80003bf22a0, DPL=0
IDT[0x2b]=64-Bit Interrupt Gate target=0x0010:fffff80003bf22b0, DPL=0
IDT[0x2c]=64-Bit Interrupt Gate target=0x0010:fffff80003abca00, DPL=3
IDT[0x2d]=64-Bit Interrupt Gate target=0x0010:fffff80003abcb00, DPL=3
IDT[0x2e]=64-Bi...
Physical vs. logical / soft delete of database record?
..., troubleshooting, and reporting (This was an e-commerce / tools site for B2B transactions, and if someone used a tool, we wanted to record it even if their account was later turned off), it did have several downsides.
The downsides include (not including others already mentioned):
Performance Im...
How to bring back “Browser mode” in IE11?
...0,00,00,00,00,00,00,00,00,00,00,\
00,00,00,69,e3,6f,1a,8c,f2,d9,4a,a3,e6,2b,cb,50,80,7c,f1
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How does Google Instant work?
...span\\x3e\\x3c/span\\x3e\\x3cbr\\x3e\\x3ctable class\\x3dslk style\\x3d\\x22border-collapse:collapse;margin-top:4px\\x22\\x3e\\x3ctr\\x3e\\x3ctd style\\x3d\\x22padding-left:14px;vertical-align:top\\x22\\x3e\\x3cdiv class\\x3dsld\\x3e\\x3ca class\\x3dsla href\\x3d\\x22http://stackoverflow.com/questio...
Using git repository as a database backend
...object
$ GIT_INDEX_FILE=user_index_file git write-tree
8ea32f8432d9d4fa9f9b2b602ec7ee6c90aa2d53
# Create a commit from the tree. Returns a SHA1 hash to the commit object
# N.B. Parent commit should the same commit as in the first phase.
$ echo "User X updated their data" | git commit-tree <new_t...
How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
...First we convert both to hexadecimal:
Modulus: EB506399F5C612F5A67A09C1192B92FAB53DB28520D859CE0EF6B7D83D40AA1C1DCE2C0720D15A0F531595CAD81BA5D129F91CC6769719F1435872C4BCD0521150A0263B470066489B918BFCA03CE8A0E9FC2C0314C4B096EA30717C03C28CA29E678E63D78ACA1E9A63BDB1261EE7A0B041AB53746D68B57B68BEF37B7...
Python base64 data decode
...yTq0OyiKFEhXFjQ7KIukQk++pDsojUQ2Ti6UOyiO1C59eGQ7KJBgAAAABDsokgQx+8zUOyiTlDW2b7Q7KJUkNhYXFDsolsQw9giUOyiYUAAAAAQ7KJngAAAABDsom4AAAAAEOyidEAAAAAQ7KjJgAAAABDsqNAAAAAAEOyo1kAAAAAQ7KjcwAAAABDsqOMQxiW60Oyo6VDb3iLQ7Kjv0OCiUpDsqPYQ0zvUUOyo/FC2VN+Q7KkCwAAAABDsqQkAAAAAEOypD1CxVtqQ7KkV0NC+C9DsqRwQ3VyJ0OypIlDV0...