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What is the difference between 'java', 'javaw', and 'javaws'?
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From http://publib.boulder.ibm.com/infocenter/javasdk/v6r0/index.jsp?topic=%2Fcom.ibm.java.doc.user.aix32.60%2Fuser%2Fjava.html:
The javaw command is identical to java, except that javaw has no associated console window. Use javaw when you do not want a command prompt window to b...
How can I create a correlation matrix in R?
... way to add the variable names to the x and y column instead of just those index numbers? For me, that would make this a perfect solution. Thanks!
edit: I was trying to comment on the post by [Marc in the box], but I clearly don't know what I'm doing. However, I did manage to answer this question f...
“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
...ou're looking for as well. As long as you know that rows which would cause index conflicts will not be inserted and you plan your program accordingly, it shouldn't cause any trouble.
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Calling a Method From a String With the Method's Name in Ruby
... I would setup a hash to function references and then use the string as an index to the hash. You then call the function reference with it's parameters. This has the advantage of not allowing the wrong string to call something you don't want to call. The other way is to basically eval the string. Do...
How is a CRC32 checksum calculated?
...ncomplete: temp and testcrc are not declared, so it's unclear what's being indexed, and how much data is running through the algorithm.
The way to understand CRCs is to try to compute a few using a short piece of data (16 bits or so) with a short polynomial -- 4 bits, perhaps. If you practice this...
Are tuples more efficient than lists in Python?
...external array of pointers.
This gives tuples a small speed advantage for indexed lookups and unpacking:
$ python3.6 -m timeit -s 'a = (10, 20, 30)' 'a[1]'
10000000 loops, best of 3: 0.0304 usec per loop
$ python3.6 -m timeit -s 'a = [10, 20, 30]' 'a[1]'
10000000 loops, best of 3: 0.0309 usec per ...
How do negative margins in CSS work and why is (margin-top:-5 != margin-bottom:5)?
...h box 3 up, so it's rendered on top of (or underneath, depending on the z-index) any preceding elements. even if performance wasn't an issue, moving all elements up could mean shifting them out of the viewport, thus the current scrolling position would have to be altered to have everything visible ...
Android preferences onclick event
...o use onPreferenceTreeClick event.
For example see http://www.javased.com/index.php?source_dir=platform_packages_apps_phone/src/com/android/phone/MobileNetworkSettings.java
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
/**...
Handling warning for possible multiple enumeration of IEnumerable
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It's a shame .NET doesn't have an interface that is IEnumerable + Count + Indexer, without Add/Remove etc. methods, which is what I suspect would solve this problem.
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How can I measure the speed of code written in PHP? [closed]
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If you want to quick test performance of a framework, you can put in index.php file
//at beginning
$milliseconds = round(microtime(true) * 1000);
//and at the end
echo round(microtime(true) * 1000) - $milliseconds;
Every time you will get execution time in milliseconds. Because microsecond...