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Convert a character digit to the corresponding integer in C
...the same for letters, for example:
char c = 'b';
int x = c - 'a'; // x is now not necessarily 1
The standard guarantees that the char values for the digits '0' to '9' are contiguous, but makes no guarantees for other characters like letters of the alphabet.
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Why call git branch --unset-upstream to fixup?
... version: remote-tracking branch origin/master used to exist, but does not now, so local branch source is tracking something that does not exist, which is suspicious at best—it means a different Git feature is unable to do anything for you—and Git is warning you about it. You have been getting ...
Java using enum with switch statement
...ue and then switch on the enum value.
enum GuideView {
SEVEN_DAY,
NOW_SHOWING,
ALL_TIMESLOTS
}
// Working on the assumption that your int value is
// the ordinal value of the items in your enum
public void onClick(DialogInterface dialog, int which) {
// do your own bounds checking...
How can I merge properties of two JavaScript objects dynamically?
...You would use object spread:
let merged = {...obj1, ...obj2};
merged is now the union of obj1 and obj2. Properties in obj2 will overwrite those in obj1.
/** There's no limit to the number of objects you can merge.
* Later properties overwrite earlier properties with the same name. */
const all...
Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
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NOTE: PyPy is more mature and better supported now than it was in 2013, when this question was asked. Avoid drawing conclusions from out-of-date information.
PyPy, as others have been quick to mention, has tenuous support for C extensions. It has support, but typical...
Is it possible to use Java 8 for Android development?
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UPDATE 2017/11/04 - Android Studio 3.0 now has native support for Java 8. gradle-retrolambda is now no longer needed. See https://developer.android.com/studio/write/java8-support.html
The above link also includes migration instructions if you are using gradle-ret...
Kotlin: how to pass a function as parameter to another?
...to foo
fun something() {
foo("hi", ::buz)
}
Since Kotlin 1.1 you can now use functions that are class members ("Bound Callable References"), by prefixing the function reference operator with the instance:
foo("hi", OtherClass()::buz)
foo("hi", thatOtherThing::buz)
foo("hi", this::buz)
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How to remove an element from a list by index
...nswered Mar 9 '09 at 18:21
unbeknownunbeknown
54
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Explain how finding cycle start node in cycle linked list work?
...he loop length. After mu additional steps past the meeting point, you are now at X_(i + mu). But we have shown that X_(i + mu) = X_(mu + i) = X_mu, because of this special property of i, so mu steps past the meeting point must take you to X_mu, the start of the cycle. Basically modular arithmetic,...
Ruby max integer
I need to be able to determine a systems maximum integer in Ruby. Anybody know how, or if it's possible?
6 Answers
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