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Why can't I use Docker CMD multiple times to run multiple services?
...mmand, which is what you are experiencing. At all times, there can be only one CMD.
If you want to run multiple services, I indeed would use supervisor. You can make a supervisor configuration file for each service, ADD these in a directory, and run the supervisor with supervisord -c /etc/superviso...
Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
...he complexity might appear to be O(N), but since the numbers grow at an exponential rate it is actually O(N2) due to the complexity of multiplying the large numbers. Below is a Python implementation. It takes about 0.5 seconds to calculate for N=50,000.
def max_chars(n):
dp = [0] * (n+1)
for i ...
How to inherit constructors?
...sider why you have so many constructors and consider reducing them to only one or two in the base class. The derived classes can then mask out some of them using constant values like null and only expose the necessary ones through their constructors.
Update
In C#4 you could specify default parameter...
How can I remove all objects but one from the workspace in R?
I have a workspace with lots of objects and I would like to remove all but one. Ideally I would like to avoid having to type rm(obj.1, obj.2... obj.n) . Is it possible to indicate remove all objects but these ones ?
...
Using a strategy pattern and a command pattern
... without having to hard-code its details. It allows messages to be invoked one or more times, or passed along to different parts of the system or multiple systems without requiring the details of a specific invocation to be known before execution.
As is typical for design patterns, they do not req...
Why is it not possible to extend annotations in Java?
...Q, where it says:
Why don’t you support annotation subtyping (where one annotation type extends another)?
It complicates the annotation type
system, and makes it much more
difficult to write “Specific Tools”.
…
“Specific Tools” — Programs that query
known anno...
Explain how finding cycle start node in cycle linked list work?
...nked list while keeping the hare at meeting place, followed by moving both one step at a time make them meet at starting point of cycle?
...
Are there any cases when it's preferable to use a plain old Thread object instead of one of the newe
... when it's necessary or useful to use a plain old Thread object instead of one of the above constructs?
Sure. In precisely those cases where one of the higher-level constructs does not meet your needs.
My advice is that if you find yourself in a situation where existing higher-abstraction tools ...
How to make the division of 2 ints produce a float instead of another int?
...
Just cast one of the two operands to a float first.
v = (float)s / t;
The cast has higher precedence than the division, so happens before the division.
The other operand will be effectively automatically cast to a float by the comp...
How to check if element has any children in Javascript?
...
A couple of ways:
if (element.firstChild) {
// It has at least one
}
or the hasChildNodes() function:
if (element.hasChildNodes()) {
// It has at least one
}
or the length property of childNodes:
if (element.childNodes.length > 0) { // Or just `if (element.childNodes.length)...