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How do I check if the Java JDK is installed on Mac?
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190
javac -version in a terminal will do
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How do I convert Long to byte[] and back in java
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public static byte[] longToBytes(long x) {
buffer.putLong(0, x);
return buffer.array();
}
public static long bytesToLong(byte[] bytes) {
buffer.put(bytes, 0, bytes.length);
buffer.flip();//need flip
return buffer.getLong();
}
}
Since...
Does Java have something like C#'s ref and out keywords?
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104
No, Java doesn't have something like C#'s ref and out keywords for passing by reference.
You c...
Selecting only first-level elements in jquery
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10 Answers
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How to fix corrupted git repository?
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+200
As an alternative to CodeGnome's last option, if only the local repo is corrupted, and you know the url to the remote, you can use th...
Changing user agent on urllib2.urlopen
...to scripts. For example, Mozilla Firefox may identify itself as "Mozilla/5.0 (X11; U; Linux i686) Gecko/20071127 Firefox/2.0.0.11", while urllib2‘s default user agent string is "Python-urllib/2.6" (on Python 2.6).
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How can I add numbers in a Bash script?
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1010
For integers:
Use arithmetic expansion: $((EXPR))
num=$((num1 + num2))
num=$(($num1 + $num2...
Making a Simple Ajax call to controller in asp.net mvc
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asbasb
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Generate JSON string from NSDictionary in iOS
...ions:(NSJSONWritingOptions) (prettyPrint ? NSJSONWritingPrettyPrinted : 0)
error:&error];
if (! jsonData) {
NSLog(@"%s: error: %@", __func__, error.localizedDescription);
return @"{}";
} else {
return [[NS...
How do I pass a variable by reference?
...nge):
new_string = something_to_do_with_the_old_string(stuff_to_change[0])
stuff_to_change[0] = new_string
# then you could call it like
wrapper = [my_string]
use_a_wrapper_to_simulate_pass_by_reference(wrapper)
do_something_with(wrapper[0])
Although this seems a little cumbersome.
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