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How are multi-dimensional arrays formatted in memory?
...
Suppose, we have a1 and a2 defined and initialized like below (c99):
int a1[2][2] = {{142,143}, {144,145}};
int **a2 = (int* []){ (int []){242,243}, (int []){244,245} };
a1 is a homogeneous 2D array with plain continuous layout in memory and expr...
Finding most changed files in Git
...=format: --name-only > allfiles.csv
then open in excel
A1: FileName
A2: isVisibleFilename >> =IFERROR(IF(C2>0,TRUE,FALSE),FALSE)
A3: DotLocation >> =FIND("@",SUBSTITUTE(A2,".","@",(LEN(A2)-LEN(SUBSTITUTE(A2,".","")))/LEN(".")))
A4: HasExt >> =C2>1
A5: TYPE ...
[since C++11] std::array的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
}
// ------------------ copy ------------------
array<int, 5> a2 = a; // copy constructor.
printContainer(a2, "a2: "); // a2: 1 2 3 4 5
array<int, 5> a3(a2); //copy ctor.
printContainer(a3, "a3: "); // a3: 1 2 3 4 5
/...
Array vs. Object efficiency in JavaScript
...s
var a1 = [{id: 29938, name: 'name1'}, {id: 32994, name: 'name1'}];
var a2 = [];
a2[29938] = {id: 29938, name: 'name1'};
a2[32994] = {id: 32994, name: 'name1'};
var o = {};
o['29938'] = {id: 29938, name: 'name1'};
o['32994'] = {id: 32994, name: 'name1'};
for (var f = 0; f < 2000; f++) {
...
What is the difference between dynamic and static polymorphism in Java?
...is a reference variable of type Class A pointing to object of class A. ‘a2’ is also reference variable of type class A but pointing to object of Class B.
During compilation, while binding, compiler does not check the type of object to which a particular reference variable is pointing. It just ...
How to print a linebreak in a python function?
...
>>> A = ['a1', 'a2', 'a3']
>>> B = ['b1', 'b2', 'b3']
>>> for x in A:
for i in B:
print ">" + x + "\n" + i
Outputs:
>a1
b1
>a1
b2
>a1
b3
>a2
b1
>a2
b2
>a2
b3
>a3
b1
>a3
b2
...
Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
...,2,..,k. This reduces the problem to solving the system of equations
a1 + a2 + ... + ak = b1
a12 + a22 + ... + ak2 = b2
...
a1k + a2k + ... + akk = bk
Using Newton's identities, knowing bi allows to compute
c1 = a1 + a2 + ... ak
c2 = a1a2 + a1a3 + ... + ak-1ak
...
ck = a1a2 ... ak
If you e...
How to sort a Ruby Hash by number value?
...ults, since it would not sort by string value... You should reverse a1 and a2 in your example
Best way in any case (as per Mladen) is:
metrics = {"sitea.com" => 745, "siteb.com" => 9, "sitec.com" => 10 }
metrics.sort_by {|_key, value| value}
# ==> [["siteb.com", 9], ["sitec.com", 10]...
How to compare arrays in C#? [duplicate]
... compare two generic arrays:
static bool ArraysEqual<T>(T[] a1, T[] a2)
{
if (ReferenceEquals(a1, a2))
return true;
if (a1 == null || a2 == null)
return false;
if (a1.Length != a2.Length)
return false;
var comparer = EqualityComparer<T>.Default...
How to compare arrays in JavaScript?
... same unsorted items (but not used multiple times), you can use a1.length==a2.length && a1.every((v,i)=>a2.includes(v)): var a1 =[1,2,3], a2 = [3,2,1]; (var a1 =[1,3,3], a2 = [1,1,3]; will not work as expected)
– mems
Nov 21 '16 at 15:25
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