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How to get ID of the last updated row in MySQL?
...DATE table SET id=LAST_INSERT_ID(id), row='value' WHERE other_row='blah';. Now, SELECT LAST_INSERT_ID(); will return the updated id. See newtover's answer for more details.
– Joel
Jun 2 '14 at 14:35
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What is the difference between Serialization and Marshaling?
I know that in terms of several distributed techniques (such as RPC), the term "Marshaling" is used but don't understand how it differs from Serialization. Aren't they both transforming objects into series of bits?
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Percentage width in a RelativeLayout
...rks perfectly, but if you were dead set on using a RelativeLayout, you can now use the PercentRelativeLayout from support library version 23.0.0.
– neits
Aug 21 '15 at 12:36
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Android Studio: how to attach Android SDK sources?
...nst api 24 before the sources were released. I want to point at the source now that they've been released. Restarting Android Studio after downloading the sources in the SDK manager wasnt working.
I had to act like I was going to Edit the SDK location in the SDK Manager, when I did that, I could ju...
Round to at most 2 decimal places (only if necessary)
... You've 'solved' the 1.005 'problem', but introduced a new one: now, in the Chrome console, roundToTwo(1.0049999999999999) comes out as 1.01 (inevitably, since 1.0049999999999999 == 1.005). It seems to me that the float you get if you type num = 1.005 'obviously' 'should' round to 1.00, b...
Is there a way to simulate the C++ 'friend' concept in Java?
...real so that the runtime will throw a NullPointerException if it is null.
Now boys :
package montague;
import capulet.Juliet;
public class Romeo {
public static final class Love { private Love() {} }
private static final Love love = new Love();
public static void cuddleJuliet() {
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What is the difference between memoization and dynamic programming?
...recurses down to solve the sub-problems).
A good slide from here (link is now dead, slide is still good though):
If all subproblems must be solved at least once, a bottom-up dynamic-programming algorithm usually outperforms a top-down memoized algorithm by a constant factor
No overhe...
How to check if a given directory exists in Ruby
...d method `exists?' for Dir:Class (NoMethodError). Also, the plural form is now deprecated, use .exist? instead.
– Josip Rodin
Oct 22 '15 at 9:09
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How do you loop through each line in a text file using a windows batch file?
I would like to know how to loop through each line in a text file using a Windows batch file and process each line of text in succession.
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Why do you have to call .items() when iterating over a dictionary in Python?
...hen would you ever write a condition like this?
if (key, value) in dict:
Now it's not necessary that the in operator and for ... in operate over the same items. Implementation-wise they are different operations (__contains__ vs. __iter__). But that little inconsistency would be somewhat confusing ...