Tag：Decimal point

Time：2021910
Today is the first extension of mathematics. For mathematical operation, it is nothing more than those various mathematical operations. Of course, mathematical operation is also one of the most basic and fundamental things in the development process of the whole program software. No matter what major you study, you will basically learn data structures and […]

Time：202193
First, let’s look at the representation of sixteen digits, as shown in Figure 1. Then master the correspondence table between binary numbers and hexadecimal numbers, as shown in Figure 2. Only when we firmly grasp the corresponding relationship of, can we get twice the result with half the effort in the process of transformation. The […]

Time：2021826
problem In business development, we often encounter the problem of popping up the numeric keyboard. The product side wants to pop up the pure numeric keyboard with decimal point.The following code: <input type=’number’/> In Android, you can pop up a keyboard with numbers and decimal points, and it will automatically screen illegal characters, which is […]

Time：202177
Some detailsFor most languages and tools that use traditional NFA engines, such as Java and. Net, the matching range of “.” is to match any character except for the new line character “\ n”.However, for JavaScript, the matching range of “.” is different due to the different parsing engines of different browsers. For Trident core […]

Time：2021613
value type Integer type of MySQL type Storage space occupied (unit) The value range without sign There is a consistent range of values definition TINYINT 1 0 ~ 2⁸1 2⁷ ~ 2⁷1 A very small integer SMALLINT 2 0 ~ 2¹⁶1 2¹⁶ ~ 2¹⁶1 Small integer MEDIUMINT 3 0 ~ 2²⁴1 2²⁴ ~ 2²⁴1 Medium […]

Time：202169
Convert number to amount in words About more daily use of public class operation method, you can pay attention to the next small website http://www.feiaci.com/#/self/… /** *Convert number to amount in words */ function changeToChinese (Num) { //Judge if the input is not a character, then convert it to a character if(typeof Num == “number”) […]

Time：2021417
let _ Check = / ^ ([19] [D] {0,6} 0) (\. [D] {1,2}) $/; // limit the number of digits before and after the decimal point let _ Check1 = / ^ ([19] [D] *  0) (\. [D] +)? $/; // do not limit the number of digits before and after the decimal point […]

Time：202131
The number is multiplied by the nth power of 10, converted into an integer that the computer can accurately identify, and then divided by the nth power of 10 JS precision console.log(0.1+0.2) // 0.30000000000000004 calculation Var x = 4.23323; // number of tests Var y = string (x). Indexof (“.) + 1; // get the […]

Time：202127
problem In business development, we often encounter the problem of popup numeric keyboard. The product side hopes to pop up the pure numeric keyboard with decimal point.The following code: <input type=’number’/> In Android can pop up numbers and decimal point keyboard, and automatically shield illegal characters, very perfect.But IOS is not a pure numeric keyboard, […]

Time：202124
PHPer, who is engaged in the financial industry, has frequent capital calculation. If you don’t pay attention, the user’s capital may lose hundreds of thousands, or even more terrible javascript Why is 0.1 + 0.2 not equal to 0.3? (correct result: 0.3000000000000004) Why is 0.8 * 7 not equal to 5.6? (correct result: 5.600000000005) PHP […]

Time：2021122
design sketch major function Only numbers and decimals can be entered You can customize the number of decimal points specified Auto fill 0 of decimal places Preparatory work There is one that can be usedElementVue project for Subcomponents staycomponents/MagicCreate under directoryNumberInput.vuefile Customize the required attribute values and events according to your own needs. Here you […]

Time：20201225
When I first came into contact with programming, I liked to ask the following questions for small interview questions How do 1 ‘floating point numbers compare with zeros? How to convert a 2 ‘floating point number to an integer? Then after seven or eight years, this kind of problem should rarely appear in the interview. […]