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Delete a key from a MongoDB document using Mongoose
...mode (default) does not allow to set fields which are not in the schema anymore. doc.set('field', undefined, { strict: false }) worked fine.
– Alexander Link
Jul 2 '15 at 15:01
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Extracting .jar file with command line
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How to select the rows with maximum values in each group with dplyr? [duplicate]
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This more verbose solution provides greater control on what happens in case of duplicate maximum value (in this example, it will take one of the corresponding rows randomly)
library(dplyr)
df %>% group_by(A, B) %>%
mutate...
PHP Regex to check date is in YYYY-MM-DD format
...consider that January 32 is February 1). See DateTime::getLastErrors() for more information.
Old-school solution with explode and checkdate:
list($y, $m, $d) = array_pad(explode('-', $date, 3), 3, 0);
return ctype_digit("$y$m$d") && checkdate($m, $d, $y);
This validates that the input is...
How do I prevent a Gateway Timeout with FastCGI on Nginx
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Why must a lambda expression be cast when supplied as a plain Delegate parameter
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Dual emission of constructor symbols
... used to include this information in its demangled output, but doesn't any more.
This forum post asks the same question, and the only response doesn't do any better at answering it, except for the implication that GCC could avoid emitting two constructors when polymorphism is not involved, and that...
Tree view of a directory/folder in Windows? [closed]
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Converting camel case to underscore case in ruby
...nderscore
Both options ways will yield "camel_cased_name". You can check more details it here.
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Dump Mongo Collection into JSON format
...it integers, so they don't need to
be parsed to and from text. This uses more space than JSON for small
integers, but is much faster to parse.
In addition to compactness, BSON adds additional data types
unavailable in JSON, notably the BinData and Date data types.
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