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Will strlen be calculated multiple times if used in a loop condition?
...i] != '\0'; i++)
{
//Something;
}
In the above code str[i] only verifies one particular character in the string at location i each time the loop starts a cycle, thus it will take less memory and is more efficient.
See this Link for more information.
In the code below every time the loop runs str...
node.js child process - difference between spawn & fork
...d is another Node command, but in this case you should use fork!) and only one copy of your node module is active on the processor.
Fork is a special instance of spawn, that runs a fresh instance of the V8 engine. Meaning, you can essentially create multiple workers, running on the exact same Node...
Is Java really slow?
...
Modern Java is one of the fastest languages, even though it is still a memory hog. Java had a reputation for being slow because it used to take a long time for the VM to start up.
If you still think Java is slow, see the benchmarks game re...
How to add elements to an empty array in PHP?
...array();
$cart[] = 13;
$cart[] = 14;
// etc
//Above is correct. but below one is for further understanding
$cart = array();
for($i=0;$i<=5;$i++){
$cart[] = $i;
}
echo "<pre>";
print_r($cart);
echo "</pre>";
Is the same as:
<?php
$cart = array();
array_push($cart, 13);
ar...
How to prevent form from being submitted?
... can not explain it more than Chris Baker did.
Both are correct, but none of them are "best" per se, and there may be
a reason the developer chose to use both approaches.
share
|
improve thi...
Best way to clear a PHP array's values
Which is more efficient for clearing all values in an array? The first one would require me to use that function each time in the loop of the second example.
...
Django - “no module named django.core.management”
...(at least for that version of python).
It is possible you have more than one version of python installed and django is inside of another version. You can find out all the versions of python if you type python and then press TAB. Here are all the different python's I have.
$python
python ...
How to copy a java.util.List into another java.util.List
...st<SomeBean> that is populated from a Web Service. I want to copy/clone the contents of that list into an empty list of the same type. A Google search for copying a list suggested me to use Collections.copy() method. In all the examples I saw, the destination list was supposed to contain th...
Can you nest html forms?
...
@Nilzor he's not asking whether or not it can't be done, he's asking WHY not. I agree; nesting forms is actually really useful. So if you have a one page app with tabs, each tab is its own form (so you can submit it to save progress), and they're all wrapped in a form, which y...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...p Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and building fully functional apps for Android devices. Compared to traditional text programming with Android Studio, it has limited features. We enabled App Inventor with multi-t...