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...的数据量
例子：
create or replace procedure stu_proc
(
v_id in number,
v_name in varchar2,
v_age in number,
v_msg out varchar2
) as
begin
insert into student(id, sname, age) values (v_id, v_name, v_age);
commit;
v_msg:='添加成功';
exception
when others th...
What exactly is Hot Module Replacement in Webpack?
.../webpack.js.org/concepts/plugins/
Code Splitting: https://webpack.js.org/guides/code-splitting/
webpack-dev-server: https://webpack.js.org/configuration/dev-server/
It's not so much for HMR, but here are the links:
Example: https://webpack.js.org/guides/hot-module-replacement/
API: https://webpa...
Strangest language feature
...
In JavaScript, the following construct
return
{
id : 1234,
title : 'Tony the Pony'
};
returns undefined is a syntax error due to the sneaky implicit semicolon insertion on the newline after return. The following works as you would expect though:
return {
id : 12...
How to count items in a Go map?
...C BY-SA 3.0 and may be found in the Documentation archive. Reference topic ID: 732 and example ID: 2528.
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Ignore mouse interaction on overlay image
...nd-image:url(../img/reflection.png);
background-repeat:no-repeat;
width: 195px;
pointer-events:none;
}
pointer-events attribute works pretty good and is simple.
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Javascript How to define multiple variables on a single line?
... So if you change just one of those variables, and wanted them to act individually you will not get what you want because they are not individual objects.
There is also a downside in multiple assignment, in that the secondary variables become globals, and you don't want to leak into the global name...
How do I auto-hide placeholder text upon focus using css or jquery?
...e this functionality when the field is disabled here is the CSS code: /* Hiding the placeholder text (if any), when the holding field is disabled */ input:disabled::-webkit-input-placeholder { color:transparent; } input:disabled:-moz-placeholder { color:transparent; } input:disabled::-moz-placehold...
Using an HTML button to call a JavaScript function
...in different situations.
1: There's defining it in the HTML:
<input id="clickMe" type="button" value="clickme" onclick="doFunction();" />
2: There's adding it to the DOM property for the event in Javascript:
//- Using a function pointer:
document.getElementById("clickMe").onclick = doFu...
Load and execution sequence of a web page?
...kkk.png");
});
</script>
</head>
<body>
<img id="img" src="abc.jpg" style="width:400px;height:300px;"/>
<script src="kkk.js" type="text/javascript"></script>
</body>
</html>
roughly the execution flow is about as follows:
The HTML docum...
List of All Locales and Their Short Codes?
...
The importance of locales is that your environment/os can provide formatting functionality for all installed locales even if you don't know about them when you write your application. My Windows 7 system has 211 locales installed (listed below), so you wouldn't likely write any custom ...