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What is the difference between 'my' and 'our' in Perl?
...to use them under use strict without getting typo warnings or compile-time errors. Since Perl 5.6, it has replaced the obsolete use vars, which was only file-scoped, and not lexically scoped as is our.
For example, the formal, qualified name for variable $x inside package main is $main::x. Declarin...
How to atomically delete keys matching a pattern using Redis
...ry in your Redis server, you'll run into the "too many elements to unpack" error. In that case, do:
for _,k in ipairs(redis.call('keys', ARGV[1])) do
redis.call('del', k)
end
As Kikito suggested.
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Accessing nested JavaScript objects and arays by string path
...le.net/alnitak/hEsys/
EDIT some have noticed that this code will throw an error if passed a string where the left-most indexes don't correspond to a correctly nested entry within the object. This is a valid concern, but IMHO best addressed with a try / catch block when calling, rather than having...
What does the exclamation mark do before the function?
...ight be tempted to try this:
function () {}()
but it results in a SyntaxError.
Using the ! operator before the function causes it to be treated as an expression, so we can call it:
!function () {}()
This will also return the boolean opposite of the return value of the function, in this case t...
Pretty printing XML with javascript
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I get an error, but the error has no message. It happens in the fiddle too, using firefox.
– Tomáš Zato - Reinstate Monica
Aug 23 '18 at 15:51
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Incompatible implicit declaration of built-in function ‘malloc’
I'm getting this error:
5 Answers
5
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What does status=canceled for a resource mean in Chrome Developer Tools?
...requests showed that subsequent requests weren't going to work (DNS lookup error, earlier (same) request resulted e.g. HTTP 400 error code, etc)
In our case we finally traced it down to one frame trying to append HTML to another frame, that sometimes happened before the destination frame even load...
How to copy files from 'assets' folder to sdcard?
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@rciovati got this runtime error Failed to copy asset file: myfile.txt java.io.FileNotFoundException: myfile.txt at android.content.res.AssetManager.openAsset(Native Method)
– likejudo
May 1 '14 at 16:22
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In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
...led=True will cause the model to be spat back to the user with validation errors.
– Ben
Jan 11 '18 at 21:55
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Multiple variables in a 'with' statement?
...tatement now supports this
functionality directly (without the confusing error prone quirks).
See Rafał Dowgird's answer for more information.
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