大约有 40,000 项符合查询结果（耗时：0.0775秒） [XML]
schema builder laravel migrations unique on two columns
...nique key across multiple columns.
$table->unique(array('mytext', 'user_id'));
or (a little neater)
$table->unique(['mytext', 'user_id']);
share
|
improve this answer
|
...
Get current time in milliseconds in Python?
...sy. Thanks all, sorry for the brain fart.
For reuse:
import time
current_milli_time = lambda: int(round(time.time() * 1000))
Then:
>>> current_milli_time()
1378761833768
share
|
impr...
How to read contacts on Android 2.0
...t you have added
<uses-permission android:name="android.permission.READ_CONTACTS"/>
to your AndroidManifest.xml file, then you can loop through your phone contacts like this:
Cursor cursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,null, null, null, null);
while (...
Is it possible to Turn page programmatically in UIPageViewController?
...onDirection)direction {
NSUInteger pageIndex = ((FooViewController *) [_pageViewController.viewControllers objectAtIndex:0]).pageIndex;
if (direction == UIPageViewControllerNavigationDirectionForward) {
pageIndex++;
}
else {
pageIndex--;
}
FooViewController ...
What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
...dra", other: 'asdf' }) // not okay, other not permitted
.new(person: { full_name: "Bhojendra Rauniyar" }) // not okay, full_name not permitted
.new(detail: { name: "Bhojendra", age: 32 }) // not okay, must be person
share
...
Force R not to use exponential notation (e.g. e+10)?
...
In rstudio, if you import a dataset and do train_sample_10k = format(train_sample_10k,scientific=FALSE) and reload, it will change scientific notations.
– mixdev
Nov 23 '14 at 5:21
...
Asynchronous Process inside a javascript for loop [duplicate]
...ForumPost&subject=Demo' + i + '&message=Here%20is%20the%20Demo&_charset_=UTF-8';
http.open('POST', url, true);
http.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
http.onreadystatechange = function() {
console.log("Done " + i + "<<<<...
How to use a servlet filter in Java to change an incoming servlet request url?
...ress bar).
Register the filter in web.xml on an url-pattern of /* or /Check_License/*, depending on the context path, or if you're on Servlet 3.0 already, use the @WebFilter annotation for that instead.
Don't forget to add a check in the code if the URL needs to be changed and if not, then just ca...
Saving vim macros
... character. A literal <ESC> doesn't work
– adam_0
Jan 28 '14 at 1:33
5
...
Find the index of a dict within a list, by matching the dict's value
...
tom_index = next((index for (index, d) in enumerate(lst) if d["name"] == "Tom"), None)
# 1
If you need to fetch repeatedly from name, you should index them by name (using a dictionary), this way get operations would be O(1) ti...