大约有 44,000 项符合查询结果（耗时：0.0275秒） [XML]
Correct way to use StringBuilder in SQL
...ing like below?
No, it'll cause more memory churn than just the straight concat you quoted. (Until/unless the JVM optimizer sees that the explicit StringBuilder in the code is unnecessary and optimizes it out, if it can.)
If the author of that code wants to use StringBuilder (there are arguments ...
C# Sanitize File Name
...
string clean = String.Concat(dirty.Split(Path.GetInvalidFileNameChars()));
share
|
improve this answer
|
follow
...
Does JavaScript have a built in stringbuilder class?
...et Explorer make sure you chose an implementation, which uses array joins. Concatenating strings with the + or += operator are extremely slow on IE. This is especially true for IE6. On modern browsers += is usually just as fast as array joins.
When I have to do lots of string concatenations I usua...
Select all columns except one in MySQL?
...way, you need to have permissions of course for doing this ...
SET @sql = CONCAT('SELECT ', (SELECT REPLACE(GROUP_CONCAT(COLUMN_NAME), '<columns_to_omit>,', '') FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = '<table>' AND TABLE_SCHEMA = '<database>'), ' FROM <table>');
...
How to get ALL child controls of a Windows Forms form of a specific type (Button/Textbox)?
...ls.SelectMany(ctrl => GetAll(ctrl,type))
.Concat(controls)
.Where(c => c.GetType() == type);
}
To test it in the form load event I wanted a count of all controls inside the initial GroupBox
private void Form1_Load(object sender, Ev...
Can an ASP.NET MVC controller return an Image?
... FileResult Show(int customerId, string imageName)
{
var path = string.Concat(ConfigData.ImagesDirectory, customerId, "\\", imageName);
return new FileStreamResult(new FileStream(path, FileMode.Open), "image/jpeg");
}
I obviously have some application specific stuff in here regarding the p...
Search text in fields in every table of a MySQL database
...UN ON YOUR PRODUCTION SERVER
# ** USE AN ALTERNATE BACKUP **
SELECT
CONCAT('SELECT * FROM ', A.TABLE_SCHEMA, '.', A.TABLE_NAME,
' WHERE ', A.COLUMN_NAME, ' LIKE \'%stuff%\';')
FROM INFORMATION_SCHEMA.COLUMNS A
WHERE
A.TABLE_SCHEMA != 'mysql'
AND A.TABLE_SCHEMA !...
SASS - use variables across multiple files
...S Task
var gulp = require('gulp');
var sass = require('gulp-sass');
//var concat = require('gulp-concat');
var uglifycss = require('gulp-uglifycss');
var sourcemaps = require('gulp-sourcemaps');
gulp.task('styles', function(){
return gulp
.src('sass/**/*.scss')
.pipe(so...
JavaScript curry: what are the practical applications?
...guments);
return function() {
return __method.apply(this, args.concat([].slice.apply(null, arguments)));
}
}
share
|
improve this answer
|
follow
...
What is the difference between String.Empty and “” (empty string)?
... and String.Empty is the same length, the compiler doesn't optimize string concatenation (see Eric Lippert's blog post) for String.Empty arguments. The following equivalent functions
string foo()
{
return "foo" + "";
}
string bar()
{
return "bar" + string.Empty;
}
generate this IL
.met...