In Google Sheets, I set the data validation of a cell to a number that must be greater than or equal to 100. When I enter 9999999999999999999999, I get an error that the entered value must be greater than or equal to 100. Why does this happen? I also tried to change the formats to no avail.
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Google Sheets (and spreadsheets in general) store numbers with 15 digits of precision. The reason why has to do with how numbers are stored in computer hardware. See https://en.wikipedia.org/wiki/IEEE_754 for an explanation.
When you enter a number like 9999999999999999999999, Google Sheets treats it like a string. If sheets tried to treat it like a number, it would actually be rounded to 1E22 (the last 8 digits are rounded off).
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I wonder how we can detect if a barcode that is read by barcode reader is related to an items that is sold by weight or a regular item ( in Ean-13 or other formats) ? is there any part of code that shows that it is a weighted Item?
Barcodes are just strings of characters (mostly numbers and letters) and most barcode readers/scanners do not indicate the type of barcode. They just send the value. But some values, such as an EAN13, have embedded check digits that can be used to auto-discriminate. For example, if you see a 13-digit number and calculate the mod10 check digit over the first 12 digits and it matches the 13th digit, you can be fairly certain you have an EAN13.
Alternatively, if you have control over the creation of the barcodes, you can use GS1 application identifiers to prefix each value. (GS1 barcodes can actually contain multiple values in a single symbol.) See https://www.gs1.org/standards/barcodes/application-identifiers?lang=en for more information on the standard ids. Application ids are routinely used in logistics but are fairly rare in retail channels.
So I know there are websites out there that do this for you, but not to the extent that I need. I want to be able to Create a 13 Digit Alpha Numeric code several times over, if possible have it spit out 1,000 codes at a time. However my problem is I only want there to be 4 numbers max(so 0-4 out of the 13 will be numbers and the rest CAPITAL letters), here is an example: CHC-RCJV-6KK-ZUA . The Hyphens are not a neccesity. I am new to coding for the most part, I'm not sure if it's possible to do this on windows If so I would prefer it, however I can use linux if needed. Thanks for any help!
You want up to 4 random digits and the rest capital letters. That gives you a five stage process:
Pick how many digits, from the range [0..4].
Pick that many random single digits and store them in a list.
Pick up to 13 random capital letters and store them in the same list.
Shuffle the contents of your list.
Insert the hyphens and print/display/return/whatever.
Try coding that for yourself. If you have problems making it work then show us your code and we will help you.
I'd doing some tests with the barcode generator I made and when I input some bill barcode numbers for simulating, it draws fine but just in the beginning of the barcode. the sequence of black and white stripes just match with the ones shown in the beginning of the printed bill. in some bills it keeps matching till some pairs of numbers ahead, then it looses matching. that's why I'd like some of you to draw a barcode of interleaved 2 of 5 type regarding the following binary number, so I can compare with mine: 10100100011001000110110001001000000110111100000011. this sequence is the decimal number 3419157411. or separated by pairs.
34 = 1010010001
19 = 1001000110
15 = 1100010010
74 = 0000011011
11 = 1100000011
thanks in advance.
I got "101011101110100010100011101000101000111011100010100010111010101000111011100011100010101011100011101"
You can use my Int 2of5 generator. Set the width to at least 8 and make sure to select Interleaved 2 of 5 from the dropdown.
If you want to check your barcode against an existing barcode generator, try bwip-js at http://metafloor.github.io/bwip-js. It has on online generator that supports several variations of 2 of 5 code, including interleaved. (Disclosure: I am the author of bwip-js.)
Is there a way to decrypt the goods? For example, if I received the product barcode then, using some libraries, find out what it is product? For example, apple juice, one liter of a particular company.
What is the way to solve this problem? Now I'm is not interested decision on some platform. I asking show me some decisions this problem.
Read this: GSDN Database which listed 11 million items as of about 18 months ago. I've no doubt you would be able to gain access to this database if required - it's managed by the world-wide authority.
Item barcodes may be 13, 12 or 8 digits long - there are formulæ to convert the shorter code to 13-digit. All systems were supposed to be converted to 13-digit many years ago so that there was no need for a product bearing a 13-digit barcode to also require a UPC-A (12-digit) code for use in the US.
The general scheme is to use the first 2, sometimes 3 digits for a country code, then allot a company code and item number (assigned by the company) and then a check digit. The actual number of digits assigned to the company code and item varies with the local GS1 office, but the total of country+company+item digits must be 12 + 1 check digit=13.
As an example, Australia uses country 93, then either 5 or 7 digits for company code (depending on expected number of products) then 5 or 3 digits for the item code.
Product barcodes (12 or 13 numbers long, depending on location) are just an item number, they do not carry any information about what the product is. There is some basic information you can get from these barcodes:
The first 3 digits tell you which country the barcode is from. you can look here
http://en.wikipedia.org/wiki/List_of_GS1_country_codes for a list.
The next 9 digits are made of 4 to 6 digits tell you which company the barcode comes from,
and then there are 3 to 5 digits which are the particular SKU's item number
and finally a check digit.
My app may be used anywhere in the USA, but will be used by local businesses serving their own areas.
As my project-in-development exists now (and I can change it) I'm storing only 10 digits. I'd like to think my software may be in use 10 years from now, although I can certainly release updates. But since the trend is for every person to have a phone instead of just one number per household, I understand the USA is running out of 10-digit phone numbers.
I know it may not seem so, but yes, I HAVE Googled and the answer I seek is still as clear as mud.
I read that there are locales within the USA (I don't know where) in which even within the same area code, a 1 and the area code must be dialed first. Other times, just the area code must be dialed, without the 1, even within the same area code.
MY QUESTION IS: To accommodate the whole USA and the foreseeable future, will I need to add an "optional 1" in front of the number, in the form of a check box or other device to distinguish those which need a 1 from those that don't? Is there another phone number schema coming in the future? Or putting it all more simply: Is 10 digits enough?
if you only want to store North american numbers you'll be fine
North American Numberin Plan
10 is the standard length in north america (includes canada)
You should allow for 15 digits including the country code. You already need 12 to 14 digits (including country code) for many countries.
Store all numbers in E.164 format including the country code, without spaces or punctuation.
This will allow easy expansion internationally to other countries and also allow manipulation of numbers in the database if the length of numbers used in any country were to ever change.
There's talk that US numbers will become a digit longer some time in the next decade or or two. You should plan for that now, not when you have tens of millions of numbers stored.
There's constant change in national number plans. If you know that area code 765 in country 980 is changing to area code 77 and all local numbers are having 88 added to the beginning it's a simple operation to make that change if all the numbers in the database include the country code.