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How to get the difference between two arrays in JavaScript?
...ed to change the for loop to a for .. in loop.
function arr_diff (a1, a2) {
var a = [], diff = [];
for (var i = 0; i < a1.length; i++) {
a[a1[i]] = true;
}
for (var i = 0; i < a2.length; i++) {
if (a[a2[i]]) {
delete a[a2[i]];
...
How to update a plot in matplotlib?
... the function as an argument to another like this: "plot_cont(my_function, 123)". There you have me calling plot_cont at line 86: github.com/vitobasso/audio-ml/blob/…
– Vituel
Mar 31 '15 at 1:03
...
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]...
HC-05/BLE 蓝牙通信数据乱码？接收到的中文乱码？乱码的原理及解决思路 · ...
...具默认是GBK编码，非UTF-8的，如“你好”对应16进制：C4 E3 BA C3。而App Inventor 2的中文字符串默认是UTF-8编码的（E4 BD A0 E5 A5 BD ）。
将App Inventor 2的蓝牙客户端组件的编码改为GBK即可。
当然，将串口编码格式改为UTF-8，App Inventor 2...