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Getting a slice of keys from a map
...
For example,
package main
func main() {
mymap := make(map[int]string)
keys := make([]int, 0, len(mymap))
for k := range mymap {
keys = append(keys, k)
}
}
To be efficient in Go, it's important to minimize memory allocations.
...
Access to the path is denied
...e file name.
Old Code
File.WriteAllBytes(@"E:\Folder", Convert.FromBase64String(Base64String));
Working Code
File.WriteAllBytes(@"E:\Folder\"+ fileName, Convert.FromBase64String(Base64String));
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Why use sprintf function in PHP?
...tf which means you can do much more than just inserting variable values in strings.
For instance, specify number format (hex, decimal, octal), number of decimals, padding and more. Google for printf and you'll find plenty of examples. The wikipedia article on printf should get you started.
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How can I catch a ctrl-c event?
...printf("Caught signal %d\n",s);
exit(1);
}
int main(int argc,char** argv)
{
struct sigaction sigIntHandler;
sigIntHandler.sa_handler = my_handler;
sigemptyset(&sigIntHandler.sa_mask);
sigIntHandler.sa_flags = 0;
sigaction(SIGINT, &sigIntHandler, NULL);
pau...
asp.net mvc: why is Html.CheckBox generating an additional hidden input
...rough to change it. Same goes with any other property, default value for a string is null. If you don't send a value it's null. In your example of setting a property to true in the constructor, that's honestly a bad design decision and it now comes to light because of how checkboxes work in http lan...
How to create dictionary and add key–value pairs dynamically?
..." + lastName] = "some value";
Note that keys (property names) are always strings, and non-string values will be coerced to a string when used as a key. E.g. a Date object gets converted to its string representation:
dict[new Date] = "today's value";
console.log(dict);
// => {
// "Sat Nov...
What is time_t ultimately a typedef to?
... to migrate your code.
Your data will be fine if you store your data as a string, even if it's something simple like:
FILE *stream = [stream file pointer that you've opened correctly];
fprintf (stream, "%d\n", (int)time_t);
Then just read it back the same way (fread, fscanf, etc. into an int), a...
How should I escape commas and speech marks in CSV files so they work in Excel?
... rules.
If the value contains a comma, newline or double quote, then the String value should be returned enclosed in double quotes.
Any double quote characters in the value should be escaped with another double quote.
If the value does not contain a comma, newline or double quote, then the
String ...
Why should I declare a virtual destructor for an abstract class in C++?
...
{
public:
virtual void DoFoo() = 0;
};
class Bar : public IFoo
{
char* dooby = NULL;
public:
virtual void DoFoo() { dooby = new char[10]; }
void ~Bar() { delete [] dooby; }
};
IFoo* baz = new Bar();
baz->DoFoo();
delete baz; // memory leak - dooby isn't deleted
...
How can I convert byte size into a human-readable format in Java?
...o human readable format | Programming.Guide
SI (1 k = 1,000)
public static String humanReadableByteCountSI(long bytes) {
if (-1000 < bytes && bytes < 1000) {
return bytes + " B";
}
CharacterIterator ci = new StringCharacterIterator("kMGTPE");
while (bytes <= ...