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Algorithms for coding interviews - recursion vs. iteration
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Algorithms for coding interviews - recursion vs. iteration

Recursion should be a built-in thought for programmers. It can be demonstrated by a simple example.

Question:
there are n stairs, each time one can climb 1 or 2. How many different ways to climb the stairs?
Step 1: Finding the relationship before n and n-1.
To get n, there are only two ways, one 1-stair from n-1 or 2-stairs from n-2. If f(n) is the number of
ways to climb to n, then f(n) = f(n-1) + f(n-2)
Step 2: Make sure the start condition is correct.
f(0) = 0; f(1) = 1;
The time complexity of the recursive method is exponential to n. There are a lot of redundant
computations.
f(5) f(4) + f(3) f(3) + f(2) + f(2) + f(1) f(2) + f(1) + f(2) + f(2) + f(1)
It should be straightforward to convert the recursion to iteration.
public s t a t i c int f ( int n) {
i f (n <= 2) {
return n ;
}
int f i r s t = 1 , second = 2 ;
int thi rd = 0 ;
for ( int i = 3 ; i <= n ; i ++) {
thi r
= f i r s t + second ;
f i r s t = second ;
second = thi rd ;
second = thi rd ;
}
return thi rd ;
}
For this example, iteration takes less time.

Posted on: 1/12 14:25
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How to fly to Europe for under $70
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How to fly to Europe for under $70

You can now fly from California to Europe for less than the cost of a night in a mediocre hotel.

On Tuesday, low-cost Icelandic airline WOW launched an airfare sale with one-way fares as low as $69 from Los Angeles and San Francisco to Edinburgh, Stockholm, Bristol and Copenhagen — when you fly from Jan. 15 to April 5. It also launched $99 fares to Reykjavik from Miami, Boston, Los Angeles and Washington D.C.

And these aren’t the only $69 fares that consumers will see: Low-cost airline Norwegian Air told multiple sources that it would launch $69 trans-Atlantic flights when it gets its new fleet of planes, likely this year.

http://www.airfarewatchdog.com/

Posted on: 1/12 14:22
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Top Deal of the Day -- $1399 -- Cruise 2 Continents:
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$1399 -- Cruise 2 Continents: 14-Night Spring Cruise w/Air
On this relaxing two-week vacation, really unplug as you sail from one continent to another.


$1640 & up -- Aruba 6-Nt. All-Inclusive Beach Vacation w/Air
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Spend nine nights in these three iconic European cities.


$276-$282 per nt -- All-Incl. Cancun Resort w/$400 Credit
Just 20 minutes from Tulum, Dreams Puerto Aventuras is offering stays starting at $138 per person per night.


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Cielo Spa Boutique was voted one of the top day spas by the Santa Barbara Independent, which specifically named it the top place to get a facial.


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We're bringing back one of our most popular luxury getaways ever. This ultra-luxurious AAA 5-Diamond resort offers "escapism and cultural diversion" (Travel + Leisure) in an easy-to-reach Caribbean destination -- no passport required. Travelzoo members exclusively get an unheard-of low price on stays that include credits and waived resort fees for two adults and up to two kids.


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Posted on: 12/26 15:14
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Progress DBA ADMIN - Absolute-path Databases
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Progress DBA ADMIN - Absolute-path Databases

An absolute-path database is used in most production situations. With an absolute-path
database, extents associated with the database can be stored anywhere on the system. The
control area contains absolute paths to each extent. Absolute-path databases should not be
copied using OS tools; rather, PROBKUP and PROCOPY should be used so that all underlying
files are properly backed up or copied.

Posted on: 12/26 15:09
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Facebook underreported iPhone traffic for some publishers
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Facebook underreported iPhone traffic for some publishers


Facebook Inc said it had underreported the number of views on iPhone of content published by some publishers using its Instant Articles platform between Sept. 20 and Nov. 30.

Publishers make money through ads on their posts.

Facebook said on Friday that a recent update to one of its metrics had led to the issue and affected publishers using one of its legacy platforms. Traffic numbers for iPad and Android devices were not affected.

The company apologized in September for an error in the way it measured a key measure of video viewership that significantly amplified users' viewing times on its platform.

The latest issue has been fixed and updated estimates will be provided, Facebook said.

Facebook also said it was updating the way it calculates potential audience size for ads as a way to give advertisers a better view of the number of people they can expect to reach.

Posted on: 12/17 13:15
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Common Biomedical Textile Terms - Tenter Frame
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Common Biomedical Textile Terms - Tenter Frame



Tenter Frame - A machine that dries fabric to a specified width under tension. The machine consists essentially of a pair of endless chains on horizontal tracks. The fabric is held firmly at the edges by pins or clips on the two chains that diverge as they advance through the heated chamber, adjusting the fabric to the desired width.

Posted on: 12/17 13:06
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US Family-Based Immigrant Visas - Misrepresentation of Material Facts or Fraud
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US Family-Based Immigrant Visas - Misrepresentation of Material Facts or Fraud

Attempting to obtain a visa by the willful misrepresentation of a material fact or fraud may result in you becoming permanently ineligible to receive a U.S. visa or enter the United States.

Posted on: 12/2 11:09
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Joks: $1 Million in Heaven
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$1 Million in Heaven


Joe asked God, "How much is a penny worth in heaven?"

God replied, "$1 million."

Joe asked, "How long is a minute in heaven?"

God said, "One million years."

Joe asked for a penny.

God said, "Sure, in a minute."

Posted on: 12/2 11:06
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Dealing with Rejection During the Job Search
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Dealing with Rejection During the Job Search

1. Depersonalize the rejection.
Companies make decisions on the basis of many factors. They may have really liked you, but you may not have had the experience, a certain technical skill, or the right style to fill a role. It's quite possible it really is them and not you.

2. Do a reality check.
As candidates sell themselves to a company, sometimes they start to over sell themselves on how great a role is. Identify factors that were likely not to be a good fit, including parts of the job you wouldn't have enjoyed or elements of the culture that would have been annoying. Ask yourself if you were really a good fit for the roles and responsibilities of the position.

3. Realize it's their loss.
As with anyone who misses out on your talents and abilities, it's best to realize that they are the ones who lose out. Nobody likes this excuse, but companies make bad hiring decisions all the time. It's quite possible they made a mistake, and maybe that says something about the company in the first place.

4. Follow-up.
While not all companies will respond to candidates they reject, they are often willing to share a little feedback with candidates who came close to getting the job. Follow-up with your key contacts, thank them, and let them know how much a role like this is something that you would like in the future. Then ask for feedback.

5. Stay on their radar.
Just because you were rejected from a specific role, doesn't mean they didn't think you were impressive. After all, only one person can be hired for one role. Stay in touch with the recruiter or hiring manager. Don't do so in a needy way, but rather touch base from time to time just to stay connected. If something else comes up, this will help you stay top of mind.

6. Be graceful.
As with staying on their radar, nobody likes a poor loser. So in defeat, stay positive and friendly. Thank everyone for their time, and offer to help in the future if there is ever an opportunity. Some of the best jobs come from referrals so even if they didn't hire you, they may know someone who is looking for someone similar to you.

7. Keep on truckin'.
Use the negative energy of rejection to renew your job search. Retake a look at your resume, start networking aggressively, and work on scheduling more interviews.

8. Find the positives in your current world.
So you have been rejected and may have to return back to an unfavorable work scenario. It's wise to accept that another "close call" may take some time, and it is best to come in and do your best in your current role. Something great will come along, just stay positive and patient.

Posted on: 2016/11/7 13:46
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10 Easy and Affordable Home Safety Resolutions for 2016
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10 Easy and Affordable Home Safety Resolutions for 2016

January is the month for New Years’ Resolutions, and it’s the perfect time to revisit your home security strategy and safety planning for 2016. While there is nothing more important than the safety of your home and family, it can be challenging to know what changes you need to make and the areas in which you and your household can improve. Is this the year you’ll finally invest in a home security system, or does it make more sense to focus on smaller goals like fire safety and indoor air quality?

Here are some practical home safety resolutions for 2016 that are affordable, easy to implement, and, most importantly, will keep the people you love safe all year long.

1. Incorporate Smart Safety Products

2016 is the year to explore adding “smart” safety features to your home; locks, doorbells, smoke detectors, and even motion-triggered security lighting can be controlled from the convenience of your mobile phone or home automation hub. Bluetooth-enabled smart locks from trusted brands like Kwikset and August are very affordable, and can offer a higher level of security for the main entrances of your home. Smart sensors like the Nest Protect alert your phone when there is environmental danger, and test themselves to make sure they are always operational. To avoid being overwhelmed with options, try investigating two safety features in your home you’d like to improve with home automation in 2016 and focus on integrating these.

2. Check Your Sensors and Alarms Regularly

Perform operational tests and check the battery charge of all of the smoke, carbon monoxide, and radon sensors in your home. Smoke alarms and other household sensors are supposed to be checked once a month, but many homeowners and renters never test their alarms. Set a realistic schedule for testing your sensors and stick to it in 2016.

3. Maintain Healthy Air Quality

The average person spends over 90% of their time indoors, so the air quality of your home can definitely have an effect on your respiratory health. Take steps to improve the indoor air quality of your home this year by increasing ventilation, changing furnace and air vent filters regularly, and perhaps even purchasing a few air-scrubbing plants that oxygenate your home naturally.

4. Invest in a Home Security System

Home security is more affordable than ever in 2016. Many top brands now offer DIY installation packages that can be up-and-running in 24 hours, and monthly monitoring fees starting at just $15 per month. Security system features and pricing vary, so do your research and find a system that fits your budget and reflects the safety needs of your home and family.

5. Replace the Hide-a-key

While hide-a-key gadgets can seem convenient on the surface, in reality they are a beacon for burglars. There are far more crafty ways of hiding a spare key outside your home that attract less attention. Ideally, avoid placing a spare key outside your home and instead entrust one to a neighbor or friend in case you should accidentally lock yourself out.

6. Focus on Fire Safety

According to the National Fire protection Association, 369,500 homes burnt down in 2013. House fires are a preventable tragedy, but many home owners are not adequately prepared and do not own basic fire safety equipment. Educate yourself and your family about fire prevention tips and make sure you have one or more fire extinguishers on each floor of your home that are easily accessible to every member of your family.

7. Make a Plan for Natural Disasters

While we all hope that a natural disaster never affects our home, it’s best to prepare an emergency communication plan and educate your family about how to react in different types of emergency situations. Select a safe zone in your home where members of the household will meet during an emergency, and research which types of natural disasters are most likely to occur in your area and how to respond. Prepare a “Go Bag” for each member of the family, and decide on a safe place to meet outside the home should you have to seek shelter elsewhere.

8. Re-think Gun and Weapon Safety

If you store guns or other weapons in your home for recreation or self-defense, reconsider the security of your weapons from children and intruders. According to the Bureau of Justice, 1.4 million firearms were stolen during household burglaries from 2005 to 2015. Consider purchasing a gun and weapon safe for your home, and make sure to educate children about weapon safety.

9. Limit Online Updates When on Vacation

Many homeowners mistakenly think there is no link between their online activity and home security. In fact, many burglars and home intruders use your social media status and photo updates to predict your movements and determine the best time to enter your home. One study suggests that a shocking 78% of thieves monitor Facebook, Twitter, and FourSquare before they pinpoint a specific house to rob. Avoid posting to social media when you are on vacation or will be away from your home for long periods of time.

10. Secure Hazardous Substances

Hazardous substances like medications, caustic chemicals, and reactive materials are a safety concern that is often overlooked and can prove deadly in homes with young children or pets. Avoid storing cleaning products and other chemicals in easily-accessible places like under the sink or on lower shelves in your pantry or garage. Keep chemicals in their original bottles or clearly label them when transferring to a new container. Also be careful where you keep medications, and try to place vitamins and other pills in child-safe bottles to avoid accidental overdose.

Now that the hustle and bustle of the holiday season has passed, you finally have time to reflect and plan some practical home safety goals for your home in 2016. While it can be hard to know where to implement changes to improve security, these 10 home safety resolutions should help you on your way to a safer and happier new year.

Posted on: 2016/11/7 13:41
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