Programming Basics #30 Regular Expressions

Course. The Basics of Programming.#30 Regular ExpressionsLearn to code.Introduction to regular expressionsAs we know, strings have great built in functionalities, we can convert them to upper case, we can slice peaces out, we can find if a word exists in a string. But what we are more interested in, is in the format itself. Maybe we want to ask, is it an email address, or is it a url, or perhaps we want to know if a password have a mixture of upper case and lower case letters and special symbols.Now to do this, many programming languages including java_script, have something called, Regular expressions built in to the language.Regular expressions are strings looking for sequences of characters, that can describe and can match patterns in strings.They are not pleasent to begin with, but they very useful and you should know what they are, and what they can do.You have always two parts to work with regular expressions.First you create the expression that describes the pattern you looking for.And second, you try and apply to something, asking if he match's.So, step one.We create a variable, i'm calling my, R, E, from my regular expression. Equal to, forward slash, hello, forward slash.And now you may ask, where is the quotes?Note that we have the two forward slashes. They marking this as an regular expression.Is the java_script short hand for doing this....

Lisa RASAMY

You should go in France !

Jeremy Paulus

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BUBR_Rustyz

I mean Tyler with little to no beard

Noah Scholz

When will you make a AFL video for us Australians

Gamer Cleo

When i watched this i got scared then opened my bedroom door and the lights

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film in Hawii

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Everyone*

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Name of the song please anyone

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fake and homosexual

Whale Bagel

2017

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That ending, you cheeky basterd

Butterz

When people ask for nudes....

Renee Alexandra

That girl is Very impolite.

Shamvi___ Lokre

Cant believe I just found this!The music and the reveal of every Easter egg is on point. : D

SomnolentMonk

For the Easter Egg at 5:05, if you bring a Banshee through the building it'll turn into a Phantom 

Kit Snake

@FunWithGuru  if you haven't already, do just cause 2

THANKS GREAT GRANDPA! YOU MADE ME LOOK LIKE I KNOW SOMETHING! <3

Tafseer

When I was three

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jamal adam

Who’s watched this video more than once?

papyrus skeleton

Who would be hunting a duck and a deer

9chikitin

os sigo de hace poco, pero este video os hace grandes. I love this dude perfect

iBest Case

Very Sad

Rafiida Haniif

1:34 the stones look likes the one in Brave

Man;takes phone back and runs away crying

Macfie Kids

You guys should do more RC battles, cuz there great to watch

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sneaker shopping with my grandma

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Live 2 bee Haeny

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Aesthetic Dreams101

who else thinks the backround music at the beganing sounds like when ur ears ring

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The movie is not even out yet and i'm already tearing up with how beautiful the animation is

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😀

Est Crit

see, you dont need to explain to anyone why this is no 1 and this is no 3, its your opinion anyways. dont mind other people. 

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You have dumb parernts

Connor Bell

I’ve been watching your YouTube video since I was seven and I’m 12 now

hii kw

I loveee being singel😅

   

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