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Encoding an image file with base64
I want to encode an image into a string using the base64 module. I've ran into a problem though. How do I specify the image I want to be encoded? I tried using the directory to the image, but that simply leads to the directory being encoded. I want the actual image file to be encoded.
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Detect encoding and make everything UTF-8
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If you apply utf8_encode() to an already UTF-8 string, it will return garbled UTF-8 output.
I made a function that addresses all this issues. It´s called Encoding::toUTF8().
You don't need to know what the encoding of your strings is. It can be Latin1 (ISO 8859-1), Win...
How do I check if a string is valid JSON in Python?
In Python, is there a way to check if a string is valid JSON before trying to parse it?
4 Answers
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What is the most frequent concurrency issue you've encountered in Java? [closed]
...erent open source libraries did something like this:
private static final String LOCK = "LOCK"; // use matching strings
// in two different libraries
public doSomestuff() {
synchronized(LOCK) {
this.work();
}
}
At first glance, this look...
How to Replace dot (.) in a string in Java
I have a String called persons.name
4 Answers
4
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Ruby Regexp group matching, assign variables on 1 line
I'm currently trying to rexp a string into multiple variables. Example string:
5 Answers
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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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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, ...
range over interface{} which stores a slice
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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)
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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 ...