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How to find out element position in slice?
...agree with Evan. Additional comment: it's more idiomatic to return just an int where -1 indicates "not found" (like bytes.IndexByte)
– Krzysztof Kowalczyk
Nov 29 '11 at 8:22
3
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Is a colon `:` safe for friendly-URL use?
...".", "-", "*", and
"_" remain the same.
The space
character " " is converted into a plus
sign "+".
All other characters are
unsafe and are first converted into
one or more bytes using some encoding
scheme. Then each byte is represented
by the 3-character string "%xy", where
xy ...
Why unsigned integer is not available in PostgreSQL?
I came across this post ( What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL? ) and realized that PostgreSQL does not support unsigned integer.
...
Undefined, unspecified and implementation-defined behavior
...n the program!
Let's look at a classic example:
#include <iostream>
int main()
{
char* p = "hello!\n"; // yes I know, deprecated conversion
p[0] = 'y';
p[5] = 'w';
std::cout << p;
}
The variable p points to the string literal "hello!\n", and the two assignments below ...
How do I get the first element from an IEnumerable in .net?
...e enumerable contains more than one item.
Edit: Thanks Marc Gravell for pointing out that I need to dispose of my IEnumerator object after using it - I've edited the non-LINQ example to display the using keyword to implement this pattern.
...
How to simplify a null-safe compareTo() implementation?
... .thenComparing(Metadata::getValue, nullSafeStringComparator);
public int compareTo(Metadata that) {
return metadataComparator.compare(this, that);
}
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ruby 1.9: invalid byte sequence in UTF-8
...-op, and no checks are run. Ruby Core Documentation for encode. However, converting it to UTF-16 first forces all the checks for invalid byte sequences to be run, and replacements are done as needed.
– Jo Hund
Aug 11 '13 at 18:32
...
Using scanf() in C++ programs is faster than using cin?
...and XOR all of the numbers.
iostream version:
#include <iostream>
int main(int argc, char **argv) {
int parity = 0;
int x;
while (std::cin >> x)
parity ^= x;
std::cout << parity << std::endl;
return 0;
}
scanf version:
#include <stdio.h>
int main...
Declaring a custom android UI element using XML
...get this
a.recycle();
}
R.styleable.MyCustomView is an autogenerated int[] resource where each element is the ID of an attribute. Attributes are generated for each property in the XML by appending the attribute name to the element name. For example, R.styleable.MyCustomView_android_text contai...
What does the comma operator , do?
... comma operation will always be the value of the last expression. At no point will i have the values 5, 4, 3, 2 or 1. It is simply 0. It's practically useless unless the expressions have side effects.
– Jeff Mercado
Nov 13 '10 at 7:06
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