Created
September 26, 2018 01:08
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誕生日から今日までの日数を算出
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title></title> | |
| </head> | |
| <body> | |
| <script> | |
| var y = 1994; | |
| var m = 2; | |
| var d = 2; | |
| var nowDate = new Date(); | |
| var ny = nowDate.getFullYear(); | |
| var nm = nowDate.getMonth() + 1; | |
| var nd = nowDate.getDate(); | |
| var day = 0; | |
| var mArr = [0,31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]; | |
| for( i = y+1; i < ny; i++ ){ | |
| // check leap year | |
| var ly = 0; | |
| if(i % 4 == 0 && ( i % 100 != 0 || i % 400 == 0 )){ | |
| ly = 1; | |
| mArr[2] = 29; | |
| } | |
| // get days | |
| // not include birth year and now year | |
| if(ny - y > 1 ){ | |
| day += 365 + ly; | |
| } | |
| // get days on now year | |
| if((i+1) == ny){ | |
| for(var k=1; k < nm; k++){ | |
| day += mArr[k]; | |
| } | |
| day += nd; | |
| } | |
| // get days on birth year | |
| if((i -1) == y){ | |
| day += 365 + ly; | |
| console.log(day); | |
| for(var k=1; k < m; k++){ | |
| day -= mArr[k]; | |
| } | |
| day -= d; | |
| } | |
| console.log(day); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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