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How to use git merge --squash?
...rately resolve merge conflicts for each of the intermediate commits (or at least the ones which git can't figure out itself). Using git merge --squash gets me the result I want, of a single commit for merging an entire feature branch. And, I only need to do at most one manual conflict resolution.
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What is the best way to prevent session hijacking?
...machine I will assume they can copy your secure cookie too.
At the very least, make sure old cookies lose their value after a while. Even a successful hijaking attack will be thwarted when the cookie stops working. If the user has a cookie from a session that logged in more than a month ago, make...
What are the main disadvantages of Java Server Faces 2.0?
...g the character yourself anywhere in client ID's, such as -.
Last but not least, a new scope was introduced, the view scope. It eliminated another major JSF 1.x disadvantage as described before. You just declare the bean @ViewScoped to enable the conversation scope without hassling all ways to reta...
Are there any O(1/n) algorithms?
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This question isn't as stupid as it might seem. At least theoretically, something such as O(1/n) is completely sensible when we take the mathematical definition of the Big O notation:
Now you can easily substitute g(x) for 1/x … it's obvious that the above definition sti...
Include all existing fields and add new fields to document
... This seems to be the best current solution, as you can (at least in JS) then use the spread operator to rebuild your original object with the new custom_field attached. const newObj = { ...result.document, custom_field: result.custom_field }
– ffritz
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How to concatenate strings of a string field in a PostgreSQL 'group by' query?
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How about using Postgres built-in array functions? At least on 8.4 this works out of the box:
SELECT company_id, array_to_string(array_agg(employee), ',')
FROM mytable
GROUP BY company_id;
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Check if at least two out of three booleans are true
...is question: given three boolean variables, a, b, and c, return true if at least two out of the three are true.
63 Answers
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MySQL: Invalid use of group function
...!= b.sid
GROUP BY a.pid
Which I believe should return only rows where at least two rows exist with the same pid but there is are at least 2 sids. To make sure you get back only one row per pid I've applied a grouping clause.
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Least common multiple for 3 or more numbers
How do you calculate the least common multiple of multiple numbers?
31 Answers
31
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What does $$ mean in the shell?
... file for something, you ought to be using a better language which will at least let you add the "exclusive" flag for opening (creating) the file. Then you can be sure you're not clobbering something else.
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