大约有 30,000 项符合查询结果（耗时：0.0467秒） [XML]
Laravel Eloquent ORM Transactions
...
@ChristosPapoulas did you mean, we can not get the auto increment id in transaction?
– hellojinjie
May 31 '19 at 9:55
add a co...
How to override toString() properly in Java?
... the ToStringTemplate and comparing.
making ToStringTemplate static-final means "ONE VERSION" of the truth, rather than having a "copy" of the template in the unit-test.
share
|
improve this answer...
lexers vs parsers
...parsers: context-free grammar (Chomsky's level 2).
They attach semantics (meaning) to the language pieces they find.
Lexers attach meaning by classifying lexemes (strings of symbols from the input) as the particular tokens. E.g. All these lexemes: *, ==, <=, ^ will be classified as "operator" ...
switch() statement usage
...erhead of switch vs if
test1 <- function(type) {
switch(type,
mean = 1,
median = 2,
trimmed = 3)
}
test2 <- function(type) {
if (type == "mean") 1
else if (type == "median") 2
else if (type == "trimmed") 3
}
system.time( for(i in 1:1e6) test1('mean') ) # 0.89 sec...
How do I create a new Git branch from an old commit? [duplicate]
...s will create a new branch called 'justin' and check it out.
("check out" means "to switch to the branch")
git branch justin a9c146a09505837ec03b
This just creates the branch without checking it out.
share
|
...
Setting up foreign keys in phpMyAdmin?
...
Foreign key means a non prime attribute of a table referes the prime attribute of another
*in phpMyAdmin* first set the column you want to set foreign key as an index
then click on RELATION VIEW
there u can find the options to set for...
What is the main difference between PATCH and PUT request?
...
Even if it's still in proposal, it doesn't mean it shouldn't be used. If it was the case, we wouldn't be able to use websockets and many other rfcs that are still in proposal... Implementing the proposal is 100 times better than implementing something completely custo...
What does PorterDuff.Mode mean in android graphics.What does it do?
I would like to know what PorterDuff.Mode means in android graphics.
2 Answers
2
...
MySQL join with where clause
...dition, you specify the rowset that you will be joining to the table. This means that it evaluates user_id = 1 first, and takes the subset of user_category_subscriptions with a user_id of 1 to join to all of the rows in categories. This will give you all of the rows in categories, while only the cat...
PopupWindow - Dismiss when clicked outside
...ike a dialog with 'cancel' property => Try it! And you will know what I mean.
mPopupWindow.setFocusable(true);
// Removes default background.
mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
Mttdat.
...