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What is the preferred/idiomatic way to insert into a map?
...en different insert versions can be neglected (didn't perform a hypothesis test though)!
The map_W_3[it] = Widget(2.0); version takes about 10-15 % more time for this example due to an initialization with the default constructor for Widget.
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Why Func instead of Predicate?
...s a bool - don't need to understand any terminology - just apply my truth test.
For "predicate" this might have been OK, but I appreciate the attempt to standardise. It also allows a lot of parity with the related methods in that area.
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Add Keypair to existing EC2 instance
...e your local machine chmod john to 600.
$ chmod 600 john
Step 5: time to test your key:
$ ssh -i john john@111.111.11.111
So, in this manner, you can setup multiple users to use one EC2 instance!!
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How dangerous is it to access an array out of bounds?
...is/her computer from his/her own possibly horrible creations? After I have tested a program thoroughly, I can unleash it in the world. But the first trial run is bound to be an incorrect program. How do you guys keep your systems safe from yourself?
– ChrisD
Ma...
Where should I put tags in HTML markup?
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Just tested this with chrome, to check if this is still the same. It Is. You can check the differences in page load time of your browsers here. stevesouders.com/cuzillion
– cypher
Jan 8 '13 a...
When to use the different log levels
... this metric might help inform decisions about whether or not another beta testing cycle is needed before a release.
Warning: This MIGHT be problem, or might not. For example, expected transient environmental conditions such as short loss of network or database connectivity should be logged as War...
No == operator found while comparing structs in C++
...ator==() const = default; when you'd decided a "naive" member-by-member == test was ok. Same for !=. Given multiple members/bases, "default" <, <=, >, and >= implementations seem hopeless though - cascading on the basis of order of declaration's possible but very unlikely to be what's ...
SET versus SELECT when assigning variables?
...an this and by chance it has been returning single value. During developer testing all is fine. But this is like a ticking bomb and will cause issues when the query returns multiple results. Why? Because it will simply assign the last value to the variable.
Now let's try the same thing with SET:
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Check synchronously if file/directory exists in Node.js
...nly want to know whether it exists, you can use path.existsSync (or with latest, fs.existsSync) as noted by user618408:
var path = require('path');
if (path.existsSync("/the/path")) { // or fs.existsSync
// ...
}
It doesn't require a try/catch but gives you no information about what the thing...
Make Iframe to fit 100% of container's remaining height
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It might be worth moving the latest updates to the top of this answer. I had to go through the whole thing to get to the best answer, flexbox.
– forgivenson
Mar 29 '19 at 21:31
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