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Why is enum class preferred over plain enum?
...class Mammal { kangaroo, deer, human }; // another enum class
void fun() {
// examples of bad use of plain enums:
Color color = Color::red;
Card card = Card::green_card;
int num = color; // no problem
if (color == Card::red_card) // no problem (bad)
cout <...
How update the _id of one MongoDB Document?
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A fun issue with this appears if some field on that document has a unique index. In that situation, your example will fail because a document cannot be inserted with a duplicate value in a unique indexed field. You could fix ...
Why did my Git repo enter a detached HEAD state?
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123
I reproduced this just now by accident:
lists the remote branches
git branch -r
origi...
How can I automatically deploy my app after a git push ( GitHub and node.js)?
...PEND);
if ($payload->ref === 'refs/heads/master')
{
// path to your site deployment script
exec('./build.sh');
}
In the build.sh you will need to put usual commands to retrieve your site from github
share
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How to track down log4net problems
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Just a note I found the fun way. Make sure the <configSections></configSections> is the first entry under <configuration>. Otherwise you end up with an error.
– Nick
Jul 25 '17 at 13:59
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How to convert a data frame column to numeric type?
... you want to convert to numeric. I suggest that you should apply transform function in order to complete your task.
Now I'm about to demonstrate certain "conversion anomaly":
# create dummy data.frame
d <- data.frame(char = letters[1:5],
fake_char = as.character(1:5),
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Why doesn't String switch statement support a null case?
... Paul BelloraPaul Bellora
50.4k1717 gold badges123123 silver badges173173 bronze badges
1
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Is generator.next() visible in Python 3?
... @MaikuMori I fixed the link (waiting for peer revision) (The site diveintopython3.org seems to be down. Mirror site diveintopython3.ep.io is still alive)
– gecco
Jan 5 '12 at 20:59
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How to efficiently build a tree from a flat structure?
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123
Store IDs of the objects in a hash table mapping to the specific object. Enumerate through all...
nginx - client_max_body_size has no effect
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NGINX large uploads are successfully working on hosted WordPress sites, finally (as per suggestions from nembleton & rjha94)
I thought it might be helpful for someone, if I added a little clarification to their suggestions. For starters, please be certain you have included your incre...