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What does ~~ (“double tilde”) do in Javascript?
... whether the operands are (floating-point) numbers or strings, and the result is a number.
In other words, it yields:
function(x) {
if(x < 0) return Math.ceil(x);
else return Math.floor(x);
}
only if x is between -(231) and 231 - 1. Otherwise, overflow will occur and the number will "wrap...
How many GCC optimization levels are there?
...the man page:
-O (Same as -O1)
-O0 (do no optimization, the default if no optimization level is specified)
-O1 (optimize minimally)
-O2 (optimize more)
-O3 (optimize even more)
-Ofast (optimize very aggressively to the point of breaking standard compliance)
-Og (Optimize debugg...
Datatype for storing ip address in SQL Server
...s could take up to 39 bytes as a string.
– Aaron Schultz
Feb 9 '16 at 1:08
1
...
How to add multiple files to Git at the same time
...
For completeness the easiest way to add multiple files of one type is using the asterisk, for example for html use "git add *.html"
– Inyoka
Jan 27 '17 at 5:51
...
undefined reference to `__android_log_print'
...
correct. if there are multiple libraries, need to add this statement for each one of them (after CLEAR VARS)
– user13107
Jan 19 '16 at 4:17
...
PDO MySQL: Use PDO::ATTR_EMULATE_PREPARES or not?
...ery cache. However, make careful note of the caveats for caching query results in the MySQL documentation. There are many kinds of queries which cannot be cached or which are useless even though they are cached. In my experience the query cache isn't often a very big win anyway. Queries and schemas ...
How do I split a string into an array of characters? [duplicate]
...u can do that without split:
var s = "overpopulation";
for (var i = 0; i < s.length; i++) {
console.log(s.charAt(i));
}
You can also access each character with its index using normal array syntax. Note, however, that strings are immutable, which means you can't set the value of a charact...
How do I load a file from resource folder?
...st.csv", YourCallingClass.class);
Path path = Paths.get(url.toURI());
List<String> lines = Files.readAllLines(path, StandardCharsets.UTF_8);
// java.io.InputStream
InputStream inputStream = ClassLoaderUtil.getResourceAsStream("test.csv", YourCallingClass.class);
InputStreamReader streamRea...
Execute another jar in a Java program
...ause you have the java bin in your PATH, this is not the case for the default windows installation
– poussma
Nov 20 '12 at 15:37
...
Best way to parse command line arguments in C#? [closed]
...espace). An example from the documentation:
bool show_help = false;
List<string> names = new List<string> ();
int repeat = 1;
var p = new OptionSet () {
{ "n|name=", "the {NAME} of someone to greet.",
v => names.Add (v) },
{ "r|repeat=",
"the number of {TIMES...