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StringUtils 字符串工具扩展：强大的文本处理工具集 · App Inventor 2 中文网
...果 调用 StringUtils1.isEmailOf("test@example.com") 那么
调用 Notifier1.ShowAlert("有效的邮箱地址")
否则
调用 Notifier1.ShowAlert("无效的邮箱地址")
字符串相似度
设置 distance 为 调用 StringUtils1.LevenshteinDistance("kitten", "sitting"...
AngularJS: Is there any way to determine which fields are making a form invalid?
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The exposed properties are $pristine, $dirty, $valid, $invalid, $error.
If you want to iterate over the errors for some reason:
$scope.someForm.$error
// > { required: [{$name: "username", $error: true /*...*/},
// {$name: "password", /*..*/}] }
Each rule in error will be exp...
Creating a new dictionary in Python
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Is there any difference between dict() and {}? Or do people just prefer one over the other?
– Matt
Mar 2 '12 at 17:13
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Get value from SimpleXMLElement Object
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Just noticed if you json_encode the xml object and then json_decode it you get a nested stdObject to deal with, quite handy for when you're being lazy & working with simple structures :D
– Louis
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How can I handle the warning of file_get_contents() function in PHP?
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Step 1: check the return code: if($content === FALSE) { // handle error here... }
Step 2: suppress the warning by putting an error control operator (i.e. @) in front of the call to file_get_contents():
$content = @file_get_contents($site);
...
1052: Column 'id' in field list is ambiguous
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SQL supports qualifying a column by prefixing the reference with either the full table name:
SELECT tbl_names.id, tbl_section.id, name, section
FROM tbl_names
JOIN tbl_section ON tbl_section.id = tbl_names.id
...or a table alias:
SELECT...
What is the difference between single-quoted and double-quoted strings in PHP?
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PHP strings can be specified not just in two ways, but in four ways.
Single quoted strings will display things almost completely "as is." Variables and most escape sequences will not be interpreted. The exception is that to display a literal sing...
Limit the length of a string with AngularJS
...on () {
return function (value, wordwise, max, tail) {
if (!value) return '';
max = parseInt(max, 10);
if (!max) return value;
if (value.length <= max) return value;
value = value.substr(0, max);
if (wordwise) {
...
View array in Visual Studio debugger? [duplicate]
...ements 0-(N-1) where N is the number you add after the comma.
For example if pArray is the array, type pArray,10 in the watch window.
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removeEventListener on anonymous functions in JavaScript
...point of an anonymous function, it lacks a name or a way to reference it.
If I were you I would just create a named function, or put it in a variable so you have a reference to it.
var t = {};
var handler = function(e) {
t.scroll = function(x, y) {
window.scrollBy(x, y);
};
t.s...