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How safe is it to store sessions with Redis?
.../value pair, you can GET it immediately (i.e in real-time). The policy you select with regards to persistence (how much you delay the writes) will determine the upper-bound for how much data could be lost in a crash.
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How to initialize a List to a given size (as opposed to capacity)?
...ts of string[10]? string[10] will get garbage collected automatically if L selects the later route.
– RBT
Mar 25 '17 at 4:30
3
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Query EC2 tags from within instance
... Name=resource-id,Values=ec2metadata --instance-id --out=json|jq '.Tags[]| select(.Key == "role")|.Value'
– jolestar
Apr 25 '15 at 2:14
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How to find difference between two Joda-Time DateTimes in minutes
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I agree, this should have been the selected answer. Its neat and simple.
– Sid
Jan 9 '18 at 12:12
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Copy values from one column to another in the same table
... set str = '';
WHILE x < 5 DO
set str = (select source_col from emp where id=x);
update emp set target_col =str where id=x;
SET x = x + 1;
END WHILE;
END$$
DELIMITER ;
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Express res.sendfile throwing forbidden error
.... good catch. I didn't notice this small difference. I also wonder if the selected answer works not because it uses .sendfile but because it relies on something else completely (path). Thanks for pointing this out.
– tenor528
Feb 10 '16 at 15:53
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Parsing JSON with Unix tools
...s is format the JSON, if I'm not mistaken. It does not allow the caller to select a particular field from the output, as would an xpath solution, or something based on "JSON Pointer".
– Cheeso
Jun 4 '14 at 0:42
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Delete all but the most recent X files in bash
... but the 5 last lines (ie the 5 newest files).
xargs rm calls rm for each selected file.
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What uses are there for “placement new”?
..._b, ...);
Now you can cluster objects together in a single memory arena, select an allocator which is very fast but does no deallocation, use memory mapping, and any other semantic you wish to impose by choosing the pool and passing it as an argument to an object's placement new operator.
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How do I change the highlight style in Vim spellcheck?
...o :set spell in my Vim, I get spelling errors highlighted as if they are selected text. What I want is an MS-Word like underlining of spelling errors. I tried to lookup :help spell but could not find a clue. Any help is appreciated.
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