大约有 47,000 项符合查询结果（耗时：0.0328秒） [XML]
Pimpl idiom vs Pure virtual class interface
... important. It's appropriate for it to be a key in a std::map. Example, a "string" class, or a "date" class, or a "complex number" class. To "copy" instances of such a class makes sense.
An Entity type
Identity is important. Always passed by reference, never by "value". Often, doesn't make sense t...
'AND' vs '&&' as operator
...r. For instance,
$predA && $predB ? "foo" : "bar"
will return a string whereas
$predA and $predB ? "foo" : "bar"
will return a boolean.
share
|
improve this answer
|
...
Convert JS object to JSON string
... easily as that:
var j = {
"name": "binchen"
};
console.log(JSON.stringify(j));
share
|
improve this answer
|
follow
|
...
Rails 3: “field-with-errors” wrapper changes the page appearance. How to avoid this?
... Anurag: if html_tag happens to be nil, or anything other than a string, then a plain html_tag.html_safe would rais an error. Putting it in "#{html_tag}" implicitly calls html_tag.to_s, which hopefully will return a string, which will then be able to respond to html_safe
...
Equivalent of String.format in jQuery
... JavaScript equivalents in MicrosoftAjax of the popular .net methods, e.g. String.format(), String.startsWith(), etc. Are there equivalents to them in jQuery?
...
What is the JavaScript convention for no operation?
...itch it off by reassigning the function to no-op rather than having to add extra code to test some variable each time the function appeared.
– bearvarine
Aug 7 '16 at 5:54
...
how to rotate a bitmap 90 degrees
...2 = 4MB total)? or will the newBitmap only refer to oldBitmap (and thus no extra 2MB is required)? ......... I want to avoid outOfMemory Error at all cost!
– Shishir Gupta
Mar 1 '14 at 21:59
...
Is ASCII code 7-bit or 8-bit?
...set to 0 (yes, it's wasted in ASCII).
You can verify this by inputting a string in the ASCII character set in a text editor, setting the encoding to ASCII, and viewing the binary/hex:
Aside: the use of (strictly) ASCII encoding is now uncommon, in favor of UTF-8 (which does not waste the MSB men...
Modifying location.hash without page scrolling
...d node was last seen so you need to help them a little. You need to add an extra div to the top of the viewport, set its ID to the hash, and then roll everything back:
hash = hash.replace( /^#/, '' );
var fx, node = $( '#' + hash );
if ( node.length ) {
node.attr( 'id', '' );
fx = $( '<div&g...
Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
... out that this answer is slightly misleading. When extracting ints or std::strings or similar, the EOF bit is set when you extract the one right before the end and the extraction hits the end. You do not need to read again. The reason it doesn't get set when reading from files is because there's an ...