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Why must wait() always be in synchronized block
...d of waiting for the monitor to enter it. Moreover, when e.g. accessing an array without a synchronized block, another thread may not see the changement to it...actually another thread will not see any changements to it when it already has a copy of the array in the x-level cache (a.k.a. 1st/2nd/3rd...
Proper stack and heap usage in C++?
...ensible compilers, to allocate non-fixed size objects on the heap (usually arrays whose size is not known at compile time).
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Variable number of arguments in C++?
...er of arguments is great for debug or for functions/methods that fill some array. Also it's great for many mathematical operations, such as max, min, sum, average... It's not mess when you don't mess with it.
– Tomáš Zato - Reinstate Monica
Dec 5 '14 at 20:49...
Best practice multi language website
...ile or from DB all data at once. And than just read requested strings from array.
If you need to implement online tool to translate interface you can have all that data in DB but than still save all data to file to work with it. To reduce amount of data in memory you can split all your translated m...
How can I hash a password in Java?
...6];
random.nextBytes(salt);
KeySpec spec = new PBEKeySpec("password".toCharArray(), salt, 65536, 128);
SecretKeyFactory f = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
byte[] hash = f.generateSecret(spec).getEncoded();
Base64.Encoder enc = Base64.getEncoder();
System.out.printf("salt: %s%n",...
Set Colorbar Range in matplotlib
...Y) )
data1 = np.clip(data,0,6)
data2 = np.clip(data,-6,0)
vmin = np.min(np.array([data,data1,data2]))
vmax = np.max(np.array([data,data1,data2]))
fig = plt.figure()
ax = fig.add_subplot(131)
mesh = ax.pcolormesh(data, cmap = cm)
mesh.set_clim(vmin,vmax)
ax1 = fig.add_subplot(132)
mesh1 = ax1.pcolor...
Fastest way to remove first char in a String
...g, so you need to do that on the random strings, that you pre-populated an array (list) with, and randomly select the element of that array (list).
– ajeh
Sep 9 '16 at 19:51
a...
How do I calculate a point on a circle’s circumference?
...n x
* @param {number} input.cy - The circle's origin y
* @returns {Array[number,number]} The calculated x and y
*/
function pointsOnCircle({ radius, angle, cx, cy }){
angle = angle * ( Math.PI / 180 ); // Convert from Degrees to Radians
const x = cx + radius * Math.cos(angle);
c...
Assign one struct to another in C
...ve Complex datatypes in a structure. Here COMPLEX means that you cant have array of pointers ,pointing to lists.
An array of characters within a structure will itself not work on most compilers, this is because assignment will simply try to copy without even looking at the datatype to be of compl...
Java: when to use static methods
...tate. But when you're testing stateless static methods like Math.abs() or Arrays.sort(), even methods you can pass all dependencies into, I don't see how that would ever impede unit testing. I would say a simple rule of thumb is: if you'd ever have any reason to mock out the procedural logic, then...