numbers

Sort of trying out some quirks in javascript: First I did console.log("5" + 1); This prints 51, this is normal right, both number and string have a + operator, but since string is the first variable it will convert 1 to a string. Now when I did this: console.log(1 + "5") I expected output to be 6, as I thought it would convert string to a number. However, the magic output was 15. Could anyone more experienced in javascript brighten this up for me? Quoting ECMAScript spec The Addition operator ( + ) section : If Type(lprim) is String or Type(rprim) is String, then Return the String that is the

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center . Closed 6 years ago . With jquery, how can I get the maximum value in an array or numbers? Example: var myArray = [1,4,7,3,12,0] Expected Output:- maximum value = 12 if by highest number you mean max value you don't need jQuery. You could do: var myArray = [9,4,2,93,6,2,4,61,1]; var maxValueInArray = Math.max.apply(Math, myArray); 来源：

I have the below code. It works only when I have 2 digits. If I have 1 digit doesn't work. I want to work in both cases: one or two digit. var numberRegex = /^[1-9][0-9]$/; I've tried something like this but unfortunately doesn't work: var numberRegex = /^[1-9]?[1-9][0-9]$/; Thanks for support. Try this one out: /^\d{1,2}$/; Reading what you have it looks like you don't want to accept numbers like 01 . /^\d{1}|[1-9]\d{1}$/; Try this. /^[0-9]|[0-9][0-9]$/ This should do the job. Using an Or operator does it. try this regex: /^[1-9]\d{0,1}$/ Ozz This works: /^([0-9]{0,1}([1-9][0-9]){0,2})$/ 来源：

I'm tryin' to find a script that will let me display "linenumber# and linenumber# as well as lines#-#" from a text file in a batch file? I found this script here on this site.. @echo off setlocal enabledelayedexpansion if [%1] == [] goto usage if [%2] == [] goto usage SET /a counter=0 for /f "usebackq delims=" %%a in (%2) do ( if "!counter!"=="%1" goto exit echo %%a set /a counter+=1 ) goto exit :usage echo Usage: head.bat COUNT FILENAME :exit And it works great :) But it grabs the number of lines from the top of the text file. I want to be able to display certain lines in the text file, as

I'm storing multiple numbers in a MySQL cell by using a delimiter (eg "1,5,10") and the TEXT datatype. How do I perform lookups like this? SELECT * FROM MyTable WHERE MultiVals CONTAINS "5" And lastly, is this the preferred approach to store such values? I'm using this like a linker table, to link certain rows to multiple other rows in another table (via IDs). Since I'm trying to minimize the filesize of the DB, I thought this would be a more compact approach to linking instead of using another table like this: Person ID Product ID ----------- ----------- 3 1 3 2 3 3 7 5 7 7 It's advised to

I was told to create half a pyramid in for loops using php that looks as follows: 54321 4321 321 21 1 This is what I had created so far but I have no idea how to go about creating the rest of the pyramid. for ($iB = 5; $iB >=0; $iB--) { echo $iB.'<br>'; } Use a nested for loop . Try this... for ($iB = 5; $iB > 0; $iB--) { for($i = $iB; $i > 0; $i--){ echo $i; } echo '<br />'; } In case someone decides not to use numbers for input, do $str = '54321'; while( $str ) { echo $str . PHP_EOL; // use <br> if output is in html $str = substr( $str, 1 ); } 来源： https://stackoverflow.com/questions/25851836

I have problem converting words into numbers like Five Thousand Six Hundred Thirty two - 5632 I don't even know how to start if someone has done it please guide me how to do it... Here, i did it in python, it will help you or someone else from algorithmic perspective. #!/usr/bin/python __author__ = 'tomcat' all = { "one" : 1, "two" : 2, "three" : 3, "four" : 4, "five" : 5, "six" : 6, "seven" : 7, "eight" : 8, "nine" : 9, "ten" : 10, "eleven": 11, "twelve": 12, "thirteen": 13, "fourteen": 14, "fifteen": 15, "sixteen": 16, "seventeen": 17, "eighteen": 18, "nineteen": 19, "twenty" : 20, "thirty"