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Why does the MongoDB Java driver use a random number generator in a conditional?
...ndition. But then he messed up and inserted an effective "double negative" by reversing the inequality sign.
Coding style issues aside, stochastic logging is quite a dubious practice all by itself, especially since the log entry does not document its own peculiar behavior. The intention is, obviousl...
Validating parameters to a Bash script
...did "$#" to fix it. second, the regex also matches "foo123bar". i fixed it by doing ^[0-9]+$. you may also fix it by using grep's -x option
– Johannes Schaub - litb
Mar 31 '09 at 1:21
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GitHub pages are not updating
... in my last commit. I had to edit index.html (which uses the image), just by changing some white space, in order to get GitHub Pages to start serving the image. I suspect it doesn't rebuild unless an HTML page changes.
– Paul Lynch
Apr 13 '17 at 21:09
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Vim Configure Line Number Coloring
...ent has to come after syntax on and colorscheme otherwise it's overwritten by the default values of the syntax highlighting.
– Phenyl
May 19 at 11:44
add a comment
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Row count with PDO
...,
PDOStatement::rowCount() does not
return the number of rows affected by
a SELECT statement. Instead, use
PDO::query() to issue a SELECT
COUNT(*) statement with the same
predicates as your intended SELECT
statement, then use
PDOStatement::fetchColumn() to
retrieve the number of ro...
Another Repeated column in mapping for entity error
... same goes for productId/product).
You shouldn't reference other entities by their ID, but by a direct reference to the entity. Remove the customerId field, it's useless. And do the same for productId. If you want the customer ID of a sale, you just need to do this:
sale.getCustomer().getId()
...
Error while pull from git - insufficient permission for adding an object to repository database .git
...at does git rev-parse --show-toplevel do? I was able to fix the issue just by using chown -R user:user on the top-level directory of my repo.
– Matt K
May 12 '14 at 14:29
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Elastic search, multiple indexes vs one index and types for different data sets?
...cuments to filter.
Not recommended if you know you are going through 1 terabytes of data and you are not distributing your data across different indices or multiple shards in your Elasticsearch mapping.
Recommended for small data sets, because you will not waste storage space for marginal performanc...
JSON left out Infinity and NaN; JSON status in ECMAScript?
... floating point numbers, there should be a way to define IEEE floats, i.e. by a literals NaN/Infinity/NegInfinity. These are states of the 64 bit doubles and as such should be representable. There are people who depend on them (for reasons). They were probably forgotten because JSON/Javascript origi...
How can I update NodeJS and NPM to the next versions?
...mmand will update all the packages listed to the latest version (specified by the tag config), respecting semver.
Additionally, see the documentation on Node.js and NPM installation and Upgrading NPM.
The following original answer is from the old FAQ that no longer exists, but should work for Lin...