OOQ

Object creation method 1 var jb = { 'a':100, 'b':200, 'c':300 }; Object creation method 2 var jb = {}; jb['a'] = 100; jb['b'] = 200; jb['c'] = 300; Object creation method 3 var jb = new Object(); jb['a'] = 100; jb['b'] = 200; jb['c'] = 300; 객체 생성 방법 Object creation method 4 var jb = new Object(); jb.a = 100; jb.b = 200; jb.c = 300;

#JavaScript #JavaScript / Event / onsubmit / Event that causes a task to run before submitting the form JavaScript's onsubmit event allows you to do something before submitting the form values. Let's see how it works with a simple example. Example 1 Create a simple membership registration page. The transfer button is created with an input tag. Click Register and it will take you to ok.html. Regi..

#JavaScript #JavaScript / Functions / String() / Function to convert number to string String() String() is a function that converts a number to a string. Grammar String( object ) object : Enter a number or a variable whose value is a number. example The value of variable c is 3, which is the addition of number 1 and number 2. The value of variable d is 12, which is character 1 plus character 2. ..

#SQL #SQL Server/Schema/Create, Browse, Modify, Delete Schemas Schemas can be used to classify tables and perform privilege management. Create schema Create a schema named a. create schema a; Create table If you create a table without specifying a schema, it will have a dbo schema. create table client ( id int ); If you specify a schema and create it, the table will be created in that schema. cr..

#jQuery #jQuery/Method/.addBack() - method to select the currently selected element as well as the previously selected element .addBack() .addBack() allows the previously selected element to be selected along with the currently selected element. Grammar .addBack( [selector ] ) for example $( 'ul' ).find( 'li' ).addBack() selects li among the children of ul, and selects the first selected ul. exa..

#jQuery #jQuery/Method/.add() - method to select more elements .add() .add() is used to select additional elements. Grammar .add( selector ) For example $( 'ul' ).add( 'p' ) selects the ul element, which in turn selects the p element. Example 1 Select the li element, select the p element, and set the color to red. Lorem Ipsum Dolor Example 2 When you hover the mouse over the first li element (Lo..

#javascript #JavaScript / Functions / parseFloat(), parseInt() - functions to replace strings with numbers parseFloat() parseFloat() is a function that incorrectly replaces strings. Grammar parseFloat( string ) If you start with a number, it incorrectly replaces that number. If there are multiple numbers in the relief, replace only the first number. Spaces are ignored if they start with a space...

#php #PHP/operators/comparison operators A comparison operator is an operator that compares two values. $a == $b Returns TRUE if $a equals $b. for example $a = 123; $b = 123; This is TRUE. Also $a = 123; $b = '123'; When is also TRUE. $a === $b Returns TRUE if $a and $b are the same and have the same data type. for example $a = 123; $b = 123; This is TRUE. but, $a = 123; $b = '123'; is FALSE. $a..

#PHP #PHP/operators/arithmetic operators Arithmetic operators in PHP include +, -, *, /, %, **. - $a Reverse the sign of $a. will print -10. $a + $b Add $a and $b. will output 14. $a - $b Subtract $b from $a. will output 6. $a * $b Multiply $a and $b. will print 40. $a / $b Divide $a by $b. will output 2.5. $a % $b The remainder of dividing $a by $b. $a = 10; $b = 4; echo $a % $b; ?> will output..

#JavaScript #JavaScript / Functions / Number() / Function that converts a string to a number Number() Number() is a function that converts a string to a number. Grammar Number( object ) object: Enter a string or a variable whose value is a string. Returns NaN for values ​​that cannot be converted to a number. example The value of variable c is 12, which is character 1 plus character 2. The value..