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JavaScript string encryption and decryption?
...lare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js" integrity="sha256-/H4YS+7aYb9kJ5OKhFYPUjSJdrtV6AeyJOtTkw6X72o=" crossorigin="anonymous"></script>
<br><br>
<label>encrypted</label>
<div id="demo1"></div>
<br>
<label>decrypted</la...
Excel: last character/string match in a string
...-------------------------|----------|
| XYYZ | Y | =MATCH(2,1/(MID(A2,SEQUENCE(LEN(A2)),1)="Y")) | 3 |
| XYYYZ | YY | =MATCH(2,1/(MID(A3,SEQUENCE(LEN(A3)),2)="YY")) | 3 |
| XYYYYZ | YY | =MATCH(2,1/(MID(A4,SEQUENCE(LEN(A4)),2)="YY")) | 4 |
Whilst this bot...
equals vs Arrays.equals in Java
...gt;.<p>
*
* @param a one array to be tested for equality
* @param a2 the other array to be tested for equality
* @return <tt>true</tt> if the two arrays are equal
*/
public static boolean equals(Object[] a, Object[] a2) {
if (a==a2)
return true;
if (a==null || ...
How to avoid overflow in expr. A * B - C * D
...tion as below:
(R1 + R2 * 2^32 + R3 * 2^64 + R4 * 2^96) = R = A*B = (A1 + A2 * 2^32) * (B1 + B2 * 2^32)
R1 = (A1*B1) % 2^32
R2 = ((A1*B1) / 2^32 + (A1*B2) % 2^32 + (A2*B1) % 2^32) % 2^32
R3 = (((A1*B1) / 2^32 + (A1*B2) % 2^32 + (A2*B1) % 2^32) / 2^32 + (A1*B2) / 2^32 + (A2*B1) / 2^32 + (A2*B2) % 2...
How do you extract a column from a multi-dimensional array?
...
check it out!
a = [[1, 2], [2, 3], [3, 4]]
a2 = zip(*a)
a2[0]
it is the same thing as above except somehow it is neater
the zip does the work but requires single arrays as arguments, the *a syntax unpacks the multidimensional array into single array arguments
...
What does send() do in Ruby?
... by example:
o = Object.new
o.send(:to_s) # => "#<Object:0x00005614d7a24fa3>"
# is equivalent to:
o.to_s # => "#<Object:0x00005614d7a24fa3>"
Send lives in the Object class.
What is the benefit of ths?
The benefit of this approach is that you can pass in the method you want to ...
ssl_error_rx_record_too_long and Apache SSL [closed]
...as not enabled in apache 2.... just putting SSLEngine On
I had to execute a2ensite default-ssl and everything worked.
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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...
How to sort List of objects by some property
...object as an example)
Collections.sort(list, (ActiveAlarm a1, ActiveAlarm a2) -> a1.timeStarted-a2.timeStarted);
or even shorter:
Collections.sort(list, Comparator.comparingInt(ActiveAlarm ::getterMethod));
That one statement is equivalent to the following:
Collections.sort(list, new Compa...
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]];
...