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Difference between single and double square brackets in Bash
...Bash 4.3.11:
POSIX vs Bash extension:
[ is POSIX
[[ is a Bash extension¹ documented at: https://www.gnu.org/software/bash/manual/bash.html#Conditional-Constructs
regular command vs magic
[ is just a regular command with a weird name.
] is just an argument of [ that prevents further argument...
What is the difference between string primitives and String objects in JavaScript?
... the Annotated ES5 spec. with regard to resolving properties (and "methods"¹) of primitive values:
NOTE The object that may be created in step 1 is not accessible outside of the above method. An implementation might choose to avoid the actual creation of the object. [...]
At very low level, S...
Generating random whole numbers in JavaScript in a specific range?
...o-complement with much smaller range than Number.MAX_SAFE_INTEGER (2³²⁻¹ vs. 2⁵³), thus you have to use it with caution!
– le_m
Jun 6 '16 at 1:49
...
How to use the IEqualityComparer
...ull of unnecessary code. It could be rewritten as follows (same semantics, ¼ of the code, more readable):
public bool Equals(Class_reglement x, Class_reglement y)
{
return x.Numf == y.Numf;
}
Lastly, the ToList call is unnecessary and time-consuming: AddRange accepts any IEnumerable so conve...
Set breakpoint in C or C++ code programmatically for gdb on Linux
... answered Dec 1 '10 at 16:22
Håvard SHåvard S
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How can I safely encode a string in Java to use as a filename?
...care of the special cases where the string equals ., equals .. or is empty!¹ Many programs use URL encoding to create file names, so this is a standard technique which everybody understands.
Irreversible
Use a hash (e.g. SHA-1) of the given string. Modern hash algorithms (not MD5) can be consider...
Git “error: The branch 'x' is not fully merged”
...urrently checked out revision). In other words, when you might lose commits¹.
In practice it means that you probably amended, rebased or filtered commits and they don't seem identical.
Therefore you could avoid the warning by checking out a branch that does contain the commits that you're about un-...
How do I check if a string is a number (float)?
...ions about what is an integer e.g., for the Unicode character u'\u00b9': u'¹'.isdigit() is True but int(u'¹') raises ValueError.
– jfs
Nov 16 '12 at 16:03
8
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Safe (bounds-checked) array lookup in Swift, through optional bindings?
...in where the fashion of Swift programming is going, which in Crusty's words¹ is: "Think protocols first"
• What do we want to do?
- Get an Element of an Array given an Index only when it's safe, and nil otherwise
• What should this functionality base it's implementation on?
- Array subscript...
Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
...Bash 4.3.11:
POSIX vs Bash extension:
[ is POSIX
[[ is a Bash extension¹
regular command vs magic
[ is just a regular command with a weird name.
] is just an argument of [ that prevents further arguments from being used.
Ubuntu 16.04 actually has an executable for it at /usr/bin/[ provided...