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“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
...primary key.
– Fabrício Matté
Aug 22 '12 at 3:23
11
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How is a CRC32 checksum calculated?
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The polynomial for CRC32 is:
x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x + 1
Wikipedia
CRC calculation
Or in hex and binary:
0x 01 04 C1 1D B7
1 0000 0100 1100 0001 0001 1101 1011 0111
The highest term (x32) is usually not explic...
Creating an empty file in C#
...).Dispose(); instead of.
– Jack
Mar 22 '15 at 18:31
1
@user3791372: Close() will release the reso...
Adb Devices can't find my phone [closed]
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answered Sep 15 '11 at 19:22
j2emanuej2emanue
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bootstrap modal removes scroll bar
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answered Jul 31 '14 at 22:45
flupflup
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How to avoid reinstalling packages when building Docker image for Python projects?
...ld")
The output of docker build:
Step 1 : WORKDIR /srv
---> Running in 22d725d22e10
---> 55768a00fd94
Removing intermediate container 22d725d22e10
Step 2 : ADD ./requirements.txt /srv/requirements.txt
---> 968a7c3a4483
Removing intermediate container 5f4e01f290fd
Step 3 : RUN pip install -...
Resize image proportionally with MaxHeight and MaxWidth constraints
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user806084user806084
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In PHP, how do you change the key of an array element?
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KernelMKernelM
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How do I best silence a warning about unused variables?
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22
+1 - still I would document why you don't use the variable even if it's there.
– Tobias Langner
Sep ...
Appending a line to a file only if it does not already exist
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answered Jan 19 '15 at 9:22
rubo77rubo77
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