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What is the difference between Trap and Interrupt?
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A trap is an exception in a user process. It's caused by division by zero or invalid memory access. It's also the usual way to invoke a kernel routine (a system call) because those run with a higher priority than user code. Handling is syn...
Remove an element from a Bash array
...n working with strings
done
Caveat
This technique actually removes prefixes matching $delete from the elements, not necessarily whole elements.
Update
To really remove an exact item, you need to walk through the array, comparing the target to each element, and using unset to delete an exact mat...
How to escape a pipe char in a code statement in a markdown table?
...ant to build a table containing pieces of code in Markdown. It works fine except when I put a pipe char (i.e. | ) between the backtick (i.e. ` ) chars.
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Multiple Updates in MySQL
...'s possible - you can use INSERT ... ON DUPLICATE KEY UPDATE.
Using your example:
INSERT INTO table (id,Col1,Col2) VALUES (1,1,1),(2,2,3),(3,9,3),(4,10,12)
ON DUPLICATE KEY UPDATE Col1=VALUES(Col1),Col2=VALUES(Col2);
shar...
How to define hash tables in Bash?
...the equivalent of Python dictionaries but in Bash (should work across OS X and Linux).
15 Answers
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What is the “reactor” in Maven?
... can manipulate the maven reactor and that the reactor is a plugin. What exactly is the reactor?
2 Answers
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How to get the concrete class name as a string? [duplicate]
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instance.__class__.__name__
example:
>>> class A():
pass
>>> a = A()
>>> a.__class__.__name__
'A'
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Sorting dictionary keys in python [duplicate]
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my_list = sorted(dict.items(), key=lambda x: x[1])
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What's the use of do while(0) when we define a macro? [duplicate]
I'm reading the linux kernel and I found many macros like this:
2 Answers
2
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Ruby array to string conversion
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how to revert this?
– zx1986
Jan 19 '17 at 4:49
what do you mean revert @zx1986
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