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Difference between a Structure and a Union
...re that value.
union foo {
int a; // can't use both a and b at once
char b;
} foo;
struct bar {
int a; // can use both a and b simultaneously
char b;
} bar;
union foo x;
x.a = 3; // OK
x.b = 'c'; // NO! this affects the value of x.a!
struct bar y;
y.a = 3; // OK
y.b = 'c'; // OK
ed...
Android Reading from an Input stream efficiently
... avoid creating new String objects on each append and to avoid copying the char arrays. The implementation for your case would be something like this:
BufferedReader r = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder total = new StringBuilder();
for (String line; (line = r.re...
How do you read CSS rule values with JavaScript?
...les || []));
const allRules = ruleArrays.reduce((all, x) => all.concat(x), []);
return allRules.filter((x) => containsAny(normalize(x.selectorText), logicalORs));
};
})();
Here's it in action from the Chrome console.
...
Rearrange columns using cut
...made up of
one
range, or many ranges separated by commas. Selected input is written
in the same order that it is read, and is written exactly once.
It reaches field 1 first, so that is printed, followed by field 2.
Use awk instead:
awk '{ print $2 " " $1}' file.txt
...
Are Javascript arrays sparse?
... answered May 29 '19 at 1:52
Charles MerriamCharles Merriam
16.4k55 gold badges6262 silver badges7272 bronze badges
...
Get Android Phone Model programmatically
...talize(String str) {
if (TextUtils.isEmpty(str)) {
return str;
}
char[] arr = str.toCharArray();
boolean capitalizeNext = true;
StringBuilder phrase = new StringBuilder();
for (char c : arr) {
if (capitalizeNext && Character.isLetter(c)) {
phrase.append(Character.t...
How to create a zip file in Java
... Path sourceDir = Paths.get(dirPath);
String zipFileName = dirPath.concat(".zip");
try {
final ZipOutputStream outputStream = new ZipOutputStream(new FileOutputStream(zipFileName));
Files.walkFileTree(sourceDir, new SimpleFileVisitor<Path>() {
...
Clean code to printf size_t in C++ (or: Nearest equivalent of C99's %z in C++)
...retty one..
template< class T >
struct GetPrintfID
{
static const char* id;
};
template< class T >
const char* GetPrintfID< T >::id = "%u";
template<>
struct GetPrintfID< unsigned long long > //or whatever the 64bit unsigned is called..
{
static const char* id;
...
What should I do if two libraries provide a function with the same name generating a conflict?
...able in proper context, for example,
int (*alternative_server_init)(int, char **, char **);
Like Ferruccio stated in https://stackoverflow.com/a/678453/1635364 ,
load explicitly the library you want to use by executing (pick your favourite flags)
void* dlhandle;
void* sym;
dlhandle = dlopen("/...
How to list files in a directory in a C program?
... function to print the content of a given folder */
void show_dir_content(char * path)
{
DIR * d = opendir(path); // open the path
if(d==NULL) return; // if was not able return
struct dirent * dir; // for the directory entries
while ((dir = readdir(d)) != NULL) // if we were able to read so...