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MySQL: how to get the difference between two timestamps in seconds
...nd the expression.
Alternatively, you can use TIMEDIFF(ts1, ts2) and then convert the time result to seconds with TIME_TO_SEC().
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Using the “final” modifier whenever applicable in Java [closed]
...sibilities that you (or the next programmer, working on your code) will misinterpret or misuse the thought process which resulted in your code. At least it should ring some bells when they now want to change your previously immutable thing.
At first, it kind of looks awkward to see a lot of final k...
How to make ThreadPoolExecutor's submit() method block if it is saturated?
...vate final Semaphore semaphore;
public BoundedExecutor(Executor exec, int bound) {
this.exec = exec;
this.semaphore = new Semaphore(bound);
}
public void submitTask(final Runnable command)
throws InterruptedException, RejectedExecutionException {
sem...
What does “hashable” mean in Python?
I tried searching internet but could not find the meaning of hashable.
9 Answers
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How to update maven repository in Eclipse?
...ies
After "BUILD SUCCESS", Right-click on your project then Configure > Convert Maven Project
Note: Maven update snapshot sometimes stops working if you use anything else i.e. eclipse:eclipse or Spring Tooling
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Why can tuples contain mutable items?
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One reason is that there is no general way in Python to convert a mutable type into an immutable one (see the rejected PEP 351, and the linked discussion for why it was rejected). Thus, it would be impossible to put various types of objects in tuples if it had this restriction, in...
Is it possible to make an ASP.NET MVC route based on a subdomain?
... string host = httpContext.Request.Headers["Host"];
int index = host.IndexOf('.');
if (index >= 0)
subdomain = host.Substring(0, index);
}
if (subdomain != null)
routeData.Values["subdomain"] = subdomain;
retur...
Merge 2 arrays of objects
...{ name: "age", value: "28" },
{ name: "childs", value: '5' }
]
// Convert to key value dictionary or object
const convertToKeyValueDict = arrayObj => {
const val = {}
arrayObj.forEach(ob => {
val[ob.name] = ob.value
})
return val
}
// update or merge ...
Why doesn't .NET/C# optimize for tail-call recursion?
...l generate the relevant opcodes (though for a simple recursion it may just convert the whole thing into a while loop directly). C#'s csc does not.
See this blog post for some details (quite possibly now out of date given recent JIT changes). Note that the CLR changes for 4.0 the x86, x64 and ia64 w...
How to include a font .ttf using CSS?
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I also had trouble with Font Squirrel. success with font-converter.net
– Peter Hayman
Jun 21 at 5:24
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