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Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
...sequences they get. Specifically, storing True before the reassignment and then comparing the result to True after reassignment would break. a = True; True = 'i am an idiot'; a == True => False. Other than such reassignment, the default values are standardized as 0 and 1, and I believe it is comm...
How to clear APC cache entries?
...hat copies an APC clearing script to the web directory and accesses it and then deletes it. The script is restricted to being accessed from the localhost.
apc_clear.php
This is the file that the script copies to the web directory, accesses, and deletes.
<?php
if (in_array(@$_SERVER['REMOTE_AD...
How can I remove a specific item from an array?
...
Find the index of the array element you want to remove using indexOf, and then remove that index with splice.
The splice() method changes the contents of an array by removing
existing elements and/or adding new elements.
const array = [2, 5, 9];
console.log(array);
const index = a...
What is the difference between tree depth and height?
...f nodes in the tree such
that ni is the parent of ni+1 for 1<=i<k, then this sequence
is called a path from n1 to nk. The length of the path is k−1.
If there is a path from node R to node M, then R is an ancestor of
M, and M is a descendant of R. Thus, all nodes in the tree are
des...
Get MD5 hash of big files in Python
...nk it's more important to pick your read block size based on your disk and then to ensure that it's a multiple of md5.block_size.
– Harvey
Apr 12 '13 at 14:10
6
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Most efficient way to concatenate strings?
... (...) x += f2(...)
if (...) x += f3(...)
if (...) x += f4(...)
then you probably want StringBuilder.
Yet another article to support this claim comes from Eric Lippert where he describes the optimizations performed on one line + concatenations in a detailed manner.
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Proper URL forming with Query String and Anchor Hashtag
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If intention of using # is to denote page fragment then - yes ? then #.
If # is coming before ? and it is not to denote page fragment (this can happen when # is part of authority (username and password)) it has to be encoded or you are in trouble. Same applies to any other s...
Undo a git stash
...Git at the time, and I guess what happened is that I stashed some changes, then did some more changes which conflicted with the stashed changes, then tried to git stash pop. In that case, I think a manual resolution of conflicts is the only way, unless you're willing to discard the newer changes bef...
What is a 'SAM type' in Java?
...ming of methods and you can have multiple comparison overrides in a class, then create the comparators on the fly via the lambda expressions.
Going Deeper...
On a deeper level, Java implements these using the invokedynamic bytecode instruction added in Java 7. I said earlier that declaring a Lambd...
JavaScript check if variable exists (is defined/initialized)
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Then the answer is misleading when it says if(elem) checks for undefined (while it returns not defined error), isn't it?
– Fanky
May 14 '19 at 14:34
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