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What is the recommended approach towards multi-tenant databases in MongoDB?
...nd resources to deal with the complexity of the
design, implementation and testing of this scenario.
If you are not going to have much differences in structure and
functionality in the database for different tenants.
Your application design will allow tenants to make only minimal
customizations at r...
Why '&&' and not '&'?
...ring value;
if(dict.TryGetValue(key, out value) && value.Contains("test"))
{
// Do Something
}
TryGetValue returns false if the supplied key is not found in the dictionary. Because of the short-circuiting nature of &&, value.Contains("test") is only executed, when TryGetValue r...
Split List into Sublists with LINQ
...
To overcome this we can try Cameron's approach, which passes the above test in flying colors as it only walks the enumeration once.
Trouble is that it has a different flaw, it materializes every item in each chunk, the trouble with that approach is that you run high on memory.
To illustrate ...
Why can't we have static method in a (non-static) inner class?
...tic inner class.
For an outer class Outer, you can access a static method test() like this:
Outer.test();
For a static inner class Inner, you can access its static method innerTest() like this:
Outer.Inner.innerTest();
However, if Inner is not static, there is now no purely static way to refe...
How to get string objects instead of Unicode from JSON?
...json.loads('[' * 991 + ']' * 991)). It crashes at 992. So at least in this test, Mark's can go deeper, contrary to what you said.
– Stefan Pochmann
May 3 '17 at 21:26
...
Mimicking sets in JavaScript?
...the list if it wasn't already there
obj[A] = true;
For completeness, the test for whether A is in the list is a little safer with this:
if (Object.prototype.hasOwnProperty.call(obj, A))
// put code here
}
because of potential conflict between built-in methods and/or properties on the base Obj...
memory_get_peak_usage() with “real usage”
...
Ok, lets test this using a simple script:
ini_set('memory_limit', '1M');
$x = '';
while(true) {
echo "not real: ".(memory_get_peak_usage(false)/1024/1024)." MiB\n";
echo "real: ".(memory_get_peak_usage(true)/1024/1024)." MiB\n\n"...
How to avoid null checking in Java?
... means that you can validate code with the assertions while developing and testing, and disable them in a production environment, although my testing has shown next to no performance impact from assertions.
Not using assertions in this case is OK because the code will just fail, which is what will ...
How to check whether a pandas DataFrame is empty?
...
To see if a dataframe is empty, I argue that one should test for the length of a dataframe's columns index:
if len(df.columns) == 0: 1
Reason:
According to the Pandas Reference API, there is a distinction between:
an empty dataframe with 0 rows and 0 columns
an empty dataframe w...
How to write a large buffer into a binary file in C++, fast?
...out my SSD. I didn't expect this to see, because option2 used to be the fastest code on my old machine back then.
TL;DR: My measurements indicate to use std::fstream over FILE.
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