大约有 6,261 项符合查询结果（耗时：0.0168秒） [XML]
What's a reliable way to make an iOS app crash?
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I think in Swift you could easily throw a fatal error:
func foo() {
fatalError("crash!")
}
It is actually even intended to use this feature in case something goes wrong in order to make the app crash.
To avoid an if statement in a special case, you could use precondition, too. ...
Add new attribute (element) to JSON object using JavaScript
... you have to do is address it using the dot notation.
mything.NewField = 'foo';
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Remove by _id in MongoDB console
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I've just bumped into this myself and this variation worked for me:
db.foo.remove({**_id**: new ObjectId("4f872685a64eed5a980ca536")})
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foll...
SQL update query using joins
... the FROM clause. So im in this case is valid
Generic example
UPDATE A
SET foo = B.bar
FROM TableA A
JOIN TableB B
ON A.col1 = B.colx
WHERE ...
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#define macro for debug printing in C?
...still works even if there are no arguments? For example:
debug_print("Foo");
There's one simple, old-fashioned hack:
debug_print("%s\n", "Foo");
The GCC-only solution shown below also provides support for that.
However, you can do it with the straight C99 system by using:
#define debug_...
How do I tell CPAN to install all dependencies?
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From then on install modules by executing (as root if necessary)
cpanm Foo::Bar
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Extracting specific columns in numpy array
...nswered Dec 5 '11 at 14:24
Fred FooFred Foo
317k6464 gold badges662662 silver badges785785 bronze badges
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PHP - How to check if a string contains a specific text [duplicate]
...trpos function: http://php.net/manual/en/function.strpos.php
$haystack = "foo bar baz";
$needle = "bar";
if( strpos( $haystack, $needle ) !== false) {
echo "\"bar\" exists in the haystack variable";
}
In your case:
if( strpos( $a, 'some text' ) !== false ) echo 'text';
Note that my use ...
Assign variable value inside if-statement [duplicate]
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I pity the int foo.
– xdhmoore
May 9 '18 at 22:44
@wviana ...
get just the integer from wc in bash
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To get just line count without whitespace: wc -l < foo.txt | xargs ref - stackoverflow.com/a/12973694/149428
– Taylor Edmiston
Feb 7 '19 at 22:17
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