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Package cairo was not found in the pkg-config search path. Node j.s install canvas issue
...leshoot it.
... You need to install libcairo2-dev, libjpeg-dev and libgif-dev packages ...
sudo apt-get install libcairo2-dev libjpeg-dev libgif-dev
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Entity Framework - Code First - Can't Store List
...rimitive types. You can either create an entity (which will be saved to a different table) or do some string processing to save your list as a string and populate the list after the entity is materialized.
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difference between foldLeft and reduceLeft in Scala
I have learned the basic difference between foldLeft and reduceLeft
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Why CancellationToken is separate from CancellationTokenSource?
... to encourage successful patterns and discourage anti-patterns without sacrificing performance.
If the door was left open for misbehaving APIs, then the usefulness of the cancellation design could quickly be eroded.
CancellationTokenSource == "cancellation trigger", plus generates linked listene...
Using .gitignore to ignore everything but specific directories
...u have to explicitly allow content for each level you want to include. So if I have subdirectories 5 deep under themes, I still need to spell that out.
This is only how it worked for me. If someone cares to offer a more informed explanation by all means.
Also, these answers helpful:
how-do-nega...
Regular cast vs. static_cast vs. dynamic_cast [duplicate]
...and additions. static_cast performs no runtime checks. This should be used if you know that you refer to an object of a specific type, and thus a check would be unnecessary. Example:
void func(void *data) {
// Conversion from MyClass* -> void* is implicit
MyClass *c = static_cast<MyClass*...
What is the difference between atomic / volatile / synchronized?
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You are specifically asking about how they internally work, so here you are:
No synchronization
private int counter;
public int getNextUniqueIndex() {
return counter++;
}
It basically reads value from memory, increments it and pu...
Callback of .animate() gets called twice jquery
...lls its callback once for each element in the set you call animate on:
If supplied, the start, step, progress, complete, done, fail, and always callbacks are called on a per-element basis...
Since you're animating two elements (the html element, and the body element), you're getting two callba...
Converting unix timestamp string to readable date
... datetime module:
from datetime import datetime
ts = int("1284101485")
# if you encounter a "year is out of range" error the timestamp
# may be in milliseconds, try `ts /= 1000` in that case
print(datetime.utcfromtimestamp(ts).strftime('%Y-%m-%d %H:%M:%S'))
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SQL Server equivalent to MySQL enum data type?
... enum values are defined in application code first (e.g. C# enum), whereas if they used a table FK reference then those supposedly static enum entries could be modified at runtime which would be undesirable (and SQL Server doesn't support the concept of immutable tables), finally if you have lots of...