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How to write a large buffer into a binary file in C++, fast?
...signed long long size = 8ULL*1024ULL*1024ULL;
unsigned long long a[size];
int main()
{
FILE* pFile;
pFile = fopen("file.binary", "wb");
for (unsigned long long j = 0; j < 1024; ++j){
//Some calculations to fill a[]
fwrite(a, 1, size*sizeof(unsigned long long), pFile);...
Why can't the C# constructor infer type?
... name but different generic arity is the better constructor. In order to maintain backwards compatibility a ctor on a non-generic type must always win.
Is there a practical reason why the constructor can't support type inference?
Yes. Even if the benefit of the feature outweighs its costs -- w...
Using switch statement with a range of value in each case?
...that sort. Why not just do the following?
public static boolean isBetween(int x, int lower, int upper) {
return lower <= x && x <= upper;
}
if (isBetween(num, 1, 5)) {
System.out.println("testing case 1 to 5");
} else if (isBetween(num, 6, 10)) {
System.out.println("testing cas...
Spring .properties file: get element as an Array
...
You can try to get them as list of integer and then converts them @Value( "${base.module.elementToSearch}") private List<Integer> elementToSearch;
– Gal Bracha
Mar 21 '12 at 16:17
...
How do you use variables in a simple PostgreSQL script?
.....
END $$;
Also you can get the last insert id:
DO $$
DECLARE lastid bigint;
BEGIN
INSERT INTO test (name) VALUES ('Test Name')
RETURNING id INTO lastid;
SELECT * FROM test WHERE id = lastid;
END $$;
share
...
How can I read and parse CSV files in C++?
I need to load and use CSV file data in C++. At this point it can really just be a comma-delimited parser (ie don't worry about escaping new lines and commas). The main need is a line-by-line parser that will return a vector for the next line each time the method is called.
...
Golang: How to pad a number with zeros when printing?
How can I print a number or make a string with zero padding to make it fixed width?
6 Answers
...
Occurrences of substring in a string
...uld be an infinite loop. This can be fixed by moving the last line of code into the if block.
String str = "helloslkhellodjladfjhello";
String findStr = "hello";
int lastIndex = 0;
int count = 0;
while(lastIndex != -1){
lastIndex = str.indexOf(findStr,lastIndex);
if(lastIndex != -1){
...
How do you use the Immediate Window in Visual Studio?
...used to execute code statements that are valid in the context of a break point and inspect values. I also use it to type code snippets to learn language features.
...
How to take all but the last element in a sequence using LINQ?
... IEnumerable<T> SkipLastN<T>(this IEnumerable<T> source, int n) {
var it = source.GetEnumerator();
bool hasRemainingItems = false;
var cache = new Queue<T>(n + 1);
do {
if (hasRemainingItems = it.MoveNext()) {
cache.Enqueue(it.Current);
...