大约有 43,000 项符合查询结果（耗时：0.0449秒） [XML]
Check if a string is html or not
...will properly detect HTML string, however it has side effect that img/vide/etc. tags will start downloading resource once parsed in innerHTML.
Method #2. Another method uses DOMParser and doesn't have loading resources side effects:
function isHTML(str) {
var doc = new DOMParser().parseFromStrin...
uint8_t vs unsigned char
... are two places where we want to use uint8_t to mean 8 bits (and uint16_t, etc) and where we can have fields smaller than 8 bits. Both places are where space matters and we often need to look at a raw dump of the data when debugging and need to be able to quickly determine what it represents.
The f...
How do I concatenate or merge arrays in Swift?
...be propagated to the next operation along the chain (map, flatMap, filter, etc...).
If lazyness makes sense in your particular case, just remember to prepend or append a .lazy to flatten(), for example, modifying Tomasz sample this way:
let c = [a, b].lazy.flatten()
...
Android buildscript repositories: jcenter VS mavencentral
...vel of geeky. And with some more reason for example a security concern and etc, Android Studio team decided to switch the default repository to jcenter instead as you can see that once you create a new project from latest version of Android Studio, jcenter() would be automatically defined instead of...
How do I create an array of strings in C?
...s well:
char strs[NUMBER_OF_STRINGS][STRING_LENGTH+1] = {"foo", "bar", "bletch", ...};
This assumes the size and number of strings in the initializer match up with your array dimensions. In this case, the contents of each string literal (which is itself a zero-terminated array of char) are copie...
Detect when browser receives file download
...alue to the token's value.
Client source code (JavaScript):
function getCookie( name ) {
var parts = document.cookie.split(name + "=");
if (parts.length == 2) return parts.pop().split(";").shift();
}
function expireCookie( cName ) {
document.cookie =
encodeURIComponent(cName) ...
Immutable vs Unmodifiable collection
...ons, including concurrent modification checks, extra space in hash tables, etc.
share
|
improve this answer
|
follow
|
...
Fast way to discover the row count of a table in PostgreSQL
...block happens to hold wider than usual rows, the count is lower than usual etc.
Dead tuples or a FILLFACTOR occupy space per block. If unevenly distributed across the table, the estimate may be off.
General rounding errors.
In most cases the estimate from pg_class will be faster and more accurate....
Can an Android Toast be longer than Toast.LENGTH_LONG?
...o double the time. If you specify 3 instead the 2 it will triple the time..etc.
share
|
improve this answer
|
follow
|
...
Random row from Linq to Sql
...nough, you don't actually need to get the count. You do, however, need to fetch every element unless you get the count.
What you can do is keep the idea of a "current" value and the current count. When you fetch the next value, take a random number and replace the "current" with "new" with a probab...