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Java: Get first item from a collection
... "first" item in a Collection because it is .. well simply a collection.
From the Java doc's Collection.iterator() method:
There are no guarantees concerning the order in which the elements are returned...
So you can't.
If you use another interface such as List, you can do the following:
S...
What regular expression will match valid international phone numbers?
...he plus with the international access code for the country you are dialing from.
Note that this DOES NOT take into account national number plan rules - specifically, it allows zeros and ones in locations that national number plans may not allow and also allows number lengths greater than the nation...
Git pull without checkout?
I'm used to running git pull and other commands from within a branch I'm working on. But I have set up a development server that several people work on, so I don't want to have to switch branches when I do it. If I want to update an existing branch on the dev server from the github repository we a...
Difference between CLOB and BLOB from DB2 and Oracle Perspective?
...tackoverflow.com%2fquestions%2f21570751%2fdifference-between-clob-and-blob-from-db2-and-oracle-perspective%23new-answer', 'question_page');
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Why doesn't java.lang.Number implement Comparable? [duplicate]
...e for certain underlying implementations. Instead of excluding the methods from the API and requiring programmers to check the type of the implementation, Sun chose to have abstract versions of the methods and recommend throwing an exception if the implementation does not support the method. See Lis...
Pros and cons of Java rules engines [closed]
...and Drools?
Use a rule engine if you need to separate the business rules from the application logic. The Does Your Project Need a Rule Engine article has a good example:
For example, a typical storefront
system might involve code to calculate
a discount:
if (product.quantity > 100 &...
How to randomize (shuffle) a JavaScript array?
...It picks a random element for each original array element, and excludes it from the next draw, like picking randomly from a deck of cards.
This clever exclusion swaps the picked element with the current one, then picks the next random element from the remainder, looping backwards for optimal effici...
How to send parameters from a notification-click to an activity?
I can find a way to send parameters to my activity from my notification.
13 Answers
13...
How to generate random number with the specific length in python
...
To get a random 3-digit number:
from random import randint
randint(100, 999) # randint is inclusive at both ends
(assuming you really meant three digits, rather than "up to three digits".)
To use an arbitrary number of digits:
from random import randin...
Convert a String In C++ To Upper Case
How could one convert a string to upper case. The examples I have found from googling only have to deal with chars.
29 Answ...