大约有 40,000 项符合查询结果（耗时：0.0594秒） [XML]
What is the difference between save and insert in Mongo DB?
...
Save Vs Insert :
In your given examples, the behavior is essentially the same.
save behaves differently if it is passed with an "_id" parameter.
For save, If the document contains _id, it will upsert querying the collection on the _id field, If not, it will insert.
If a document does not...
Array include any value from another array?
...|
edited Sep 26 '16 at 12:32
czerasz
11.3k88 gold badges4747 silver badges6161 bronze badges
answered Oc...
bool to int conversion
...
answered Mar 20 '11 at 16:32
NawazNawaz
316k9999 gold badges611611 silver badges799799 bronze badges
...
How do I add a bullet symbol in TextView?
...st to clarify: use setText("\u2022 Bullet"); to add the bullet programmatically. 0x2022 = 8226
share
|
improve this answer
|
follow
|
...
Explode string by one or more spaces or tabs
...;
Sources:
strip out multi-byte white space from a string PHP
What are all the Japanese whitespace characters?
(I don't have enough reputation to post a comment, so I'm wrote this as an answer.)
share
|
...
Generating an MD5 checksum of a file
...ing (and checking) MD5 checksums of a list of files in Python? (I have a small program I'm working on, and I'd like to confirm the checksums of the files).
...
Does reading an entire file leave the file handle open?
...hat on the particular Python implementation.
To understand what this is all about, pay particular attention to the actual file object. In your code, that object is mentioned only once, in an expression, and becomes inaccessible immediately after the read() call returns.
This means that the file...
How to check if std::map contains a key without doing insert?
...
Use my_map.count( key ); it can only return 0 or 1, which is essentially the Boolean result you want.
Alternately my_map.find( key ) != my_map.end() works too.
share
|
improve this answer
...
Why does this iterative list-growing code give IndexError: list assignment index out of range?
...or l in i:
j.append(l)
Of course, you'd never do this in practice if all you wanted to do was to copy an existing list. You'd just do:
j = list(i)
Alternatively, if you wanted to use the Python list like an array in other languages, then you could pre-create a list with its elements set to ...
What is the difference between javac and the Eclipse compiler?
...
Eclipse has implemented its own compiler called as Eclipse Compiler for Java (ECJ).
It is different from the javac, the compiler that is shipped with Sun JDK. One notable difference is that the Eclipse compiler lets you run code that didn't actually properly compile...