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range over interface{} which stores a slice
...
package main
import "fmt"
import "reflect"
func main() {
data := []string{"one","two","three"}
test(data)
moredata := []int{1,2,3}
test(moredata)
}
func test(t interface{}) {
switch reflect.TypeOf(t).Kind() {
case reflect.Slice:
s := reflect.ValueOf(t)
...
In log4j, does checking isDebugEnabled before logging improve performance?
...ensive computation of the log message when it involves invocation of the toString() methods of various objects and concatenating the results.
In the given example, the log message is a constant string, so letting the logger discard it is just as efficient as checking whether the logger is enabled, ...
Create ArrayList from array
...d its of() and copyOf() factory methods (elements can't be null):
List<String> il = ImmutableList.of("string", "elements"); // from varargs
List<String> il = ImmutableList.copyOf(aStringArray); // from array
For A Mutable List
Use the Lists class and its newArrayList() factory ...
How do you return a JSON object from a Java Servlet
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I do exactly what you suggest (return a String).
You might consider setting the MIME type to indicate you're returning JSON, though (according to this other stackoverflow post it's "application/json").
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How to use hex color values
... a combination of the previous methods. There is absolutely no need to use strings.
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Compare a string using sh shell
I am using SH shell and I am trying to compare a string with a variable's value but the if condition is always execute to true. Why?
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How can I loop through a C++ map of maps?
...+11 - you can use a ranged based for loop and simply do:
std::map<std::string, std::map<std::string, std::string>> mymap;
for(auto const &ent1 : mymap) {
// ent1.first is the first key
for(auto const &ent2 : ent1.second) {
// ent2.first is the second key
// ent2.sec...
Sending images using Http Post
... know the path and filename of the image that you want to upload. Add this string to your NameValuePair using image as the key-name.
Sending images can be done using the HttpComponents libraries. Download the latest HttpClient (currently 4.0.1) binary with dependencies package and copy apache-mime...
Guava equivalent for IOUtils.toString(InputStream)
Apache Commons IO has a nice convenience method IOUtils.toString() to read an InputStream to a String.
9 Answers
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What is the advantage of using heredoc in PHP? [closed]
...eredoc syntax is much cleaner to me and it is really useful for multi-line strings and avoiding quoting issues. Back in the day I used to use them to construct SQL queries:
$sql = <<<SQL
select *
from $tablename
where id in [$order_ids_list]
and product_name = "widgets"
SQL;
To me...