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C# 'is' operator performance
...rt performance if, once you check the type, you cast to that type. is actually casts the object to the type you are checking so any subsequent casting is redundant.
If you are going to cast anyway, here is a better approach:
ISpecialType t = obj as ISpecialType;
if (t != null)
{
// use t her...
Error 1046 No database Selected, how to resolve?
...he SQL Development heading of the Workbench splash screen.
Addendum
This all assumes there's a database you want to create the table inside of - if not, you need to create the database before anything else:
CREATE DATABASE your_database;
...
What is a build tool?
...ling,linking and packaging the code into a usable or
executable form.
Basically build automation is the act of scripting or automating a
wide variety of tasks that software developers do in their day-to-day
activities like:
Downloading dependencies.
Compiling source code into binary code.
Packaging...
The current branch is not configured for pull No value for key branch.master.merge found in configur
...u switch (git push -u origin master). This will set everything up automatically.
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When to use valueChangeListener or f:ajax listener?
...e" and FacesContext#renderResponse() to prevent that from happening. After all, using the valueChangeListener to execute business actions has actually always been a hack/workaround.
Summarized: Use the valueChangeListener only if you need to intercept on the actual value change itself. I.e. you're ...
Set line spacing
...equires ᴜᴅᴘ socket (because of the lost of ɴᴘᴀᴘɪ support and all browsers are withdrawing support in their custom plug‑in ᴀᴘɪ). The ᴊᴘʟ web site dedicated to the Cassini mission still requires the quick time plugin in order to watch their videoꜱ online. Not to mention onl...
Change working directory in my current shell context when running Node script
...
The correct way to change directories is actually with process.chdir(directory). Here's an example from the documentation:
console.log('Starting directory: ' + process.cwd());
try {
process.chdir('/tmp');
console.log('New directory: ' + process.cwd());
}
catch (err...
Adjust width of input field to its input
...
It sounds like your expectation is that the style be applied dynamically to the width of the textbox based on the contents of the textbox. If so you will need some js to run on textbox contents changing, something like this:
<input id="txt" type="text" onkeypress="this.style.width = ((th...
Cannot change column used in a foreign key constraint
...eign key field and reference must be equal.
This means your foreign key disallows changing the type of your field.
One solution would be this:
LOCK TABLES
favorite_food WRITE,
person WRITE;
ALTER TABLE favorite_food
DROP FOREIGN KEY fk_fav_food_person_id,
MODIFY person_id SMALLIN...
Hiding elements in responsive layout?
...gh bootstrap it looks like they support collapsing the menubar items for smaller screens. Is there something similar for other items on the page?
...