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Inheriting from a template class in c++
...te. That is, it is a template from which classes can be generated. Area<int> is such a class (it's not an object, but of course you can create an object from that class in the same ways you can create objects from any other class). Another such class would be Area<char>. Note that those ...
How do you make an array of structs in C?
...celeration
double radius;
double mass;
};
struct body bodies[n];
int main()
{
int a, b;
for(a = 0; a < n; a++)
{
for(b = 0; b < 3; b++)
{
bodies[a].p[b] = 0;
bodies[a].v[b] = 0;
bodies[a].a[b] = 0;
...
Difference between static memory allocation and dynamic memory allocation
... a function are only there until the function finishes.
void func() {
int i; /* `i` only exists during `func` */
}
Dynamic memory allocation is a bit different. You now control the exact size and the lifetime of these memory locations. If you don't free it, you'll run into memory leaks, which...
Declaring variables inside a switch statement [duplicate]
...d this limitation. You can enclose the contents of a case in { } braces to introduce a scoping block, or you can move the variable declaration outside the switch. Which you choose is a matter of personal preference. Just be aware that a variable declared in { } braces is only valid within that scope...
How to compare objects by multiple fields
...stName)
.thenComparing(p->p.lastName)
.thenComparingInt(p->p.age);
If you have accessor methods:
Comparator.comparing(Person::getFirstName)
.thenComparing(Person::getLastName)
.thenComparingInt(Person::getAge);
If a class implements Comparable then ...
Shell Script — Get all files modified after
...
Converting an arbitrary timestamp into a fractional, relative amount of time seems neither correct nor particularly convenient. The solution below using -newermt is much nicer.
– Bobby Jack
...
Gridview with two columns and auto resized images
...
Here's a relatively easy method to do this. Throw a GridView into your layout, setting the stretch mode to stretch the column widths, set the spacing to 0 (or whatever you want), and set the number of columns to 2:
res/layout/main.xml
<?xml version="1.0" encoding="utf-8"?>
<...
How to clone an InputStream?
...same information more than once, and the input data is small enough to fit into memory, you can copy the data from your InputStream to a ByteArrayOutputStream.
Then you can obtain the associated array of bytes and open as many "cloned" ByteArrayInputStreams as you like.
ByteArrayOutputStream baos ...
Is it expensive to use try-catch blocks even if an exception is never thrown?
...eptions are thrown asynchronously, they are not async but thrown in safe points. and this part try has some minor costs associated with it. Java cannot do some optimizations on code in a try block that it would otherwise do does need a serious reference. At some point the code is very likely to be w...
Get data from fs.readFile
... if (Buffer.isBuffer( data){ result = data.toString('utf8'); } Now we have converted the buffer into readable text. This is good for reading a plaintext file or testing the file against format types. I could do a try/catch to see if it's a JSON file for example; but only after buffer is converted to...