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Interface type check with Typescript
...ou could instead add a discriminator. The below is the most basic example, and requires you to manage your own discriminators... you'd need to get deeper into the patterns to ensure you avoid duplicate discriminators.
interface A{
discriminator: 'I-AM-A';
member:string;
}
function instance...
Does Java have a HashMap with reverse lookup?
...okup in both directions. Is there a name for this type of data structure, and is anything like this included in Java's standard libraries? (or maybe Apache Commons?)
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How do I include a path to libraries in g++
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@Fred, yes, g++ understands a whole bunch of environment variables which can be used to control the include path, library path, etc.
– Ernest Friedman-Hill
Mar 16 '13 at 3:09
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What is the idiomatic Go equivalent of C's ternary operator?
In C/C++ (and many languages of that family), a common idiom to declare and initialize a variable depending on a condition uses the ternary conditional operator :
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How to convert DOS/Windows newline (CRLF) to Unix newline (LF) in a Bash script?
... up with no data in the file.
You can't do it the other way round (with standard 'tr').
If you know how to enter carriage return into a script (control-V, control-M to enter control-M), then:
sed 's/^M$//' # DOS to Unix
sed 's/$/^M/' # Unix to DOS
where the '^M' is the control-M charact...
In C#, what happens when you call an extension method on a null object?
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I was referring to the difference between call and callvirt il instructions. In one edit I actually tried to href the two Opcodes pages, but the editor barfed at the links...
– Marc Gravell♦
May 11 '09 at 9:48
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How to get the difference between two arrays in JavaScript?
... Just to be clear, this implements the symmetric difference of a1 and a2, unlike the other answers posted here.
– 200_success
Dec 13 '13 at 1:19
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How to make execution pause, sleep, wait for X seconds in R?
...anguages, there is a sleep function, but ?sleep references a data set. And ?pause and ?wait don't exist.
2 Answers
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How to assign the output of a command to a Makefile variable
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shell is not a standard Make builtin command. This is a GNU Make builtin.
– Dereckson
Feb 18 '14 at 20:17
14
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minimum double value in C/C++
Is there a standard and/or portable way to represent the smallest negative value (e.g. to use negative infinity) in a C(++) program?
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