大约有 40,000 项符合查询结果（耗时：0.0572秒） [XML]
How to construct a std::string from a std::vector?
...in VS2013 which asserts at runtime about invalid iterators, unless you set _ITERATOR_DEBUG_LEVEL=1 (in which case it seems to work fine).
– Cameron
Sep 23 '14 at 22:39
add a c...
Changing the maximum length of a varchar column?
...
You need
ALTER TABLE YourTable ALTER COLUMN YourColumn <<new_datatype>> [NULL | NOT NULL]
But remember to specify NOT NULL explicitly if desired.
ALTER TABLE YourTable ALTER COLUMN YourColumn VARCHAR (500) NOT NULL;
If you leave it unspecified as below...
ALTER TABLE Your...
Find objects between two dates MongoDB
...myself and it seems to work.
items.save({
name: "example",
created_at: ISODate("2010-04-30T00:00:00.000Z")
})
items.find({
created_at: {
$gte: ISODate("2010-04-29T00:00:00.000Z"),
$lt: ISODate("2010-05-01T00:00:00.000Z")
}
})
=> { "_id" : ObjectId("4c0791e2b9ec877...
Date query with ISODate in mongodb doesn't seem to work
...
Error running query. Reason: (invalid_operator) Invalid operator: $date
– saber tabatabaee yazdi
Sep 13 '18 at 16:49
add a comment
...
Bundler: Command not found
...t found: bundle
λ ruby -v
ruby 1.9.3p484 (2013-11-22 revision 43786) [x86_64-linux]
### Notice the system Ruby version isn't included in chruby
λ chruby
ruby-1.9.3-p551
ruby-2.1.2
ruby-2.2.1
### Select a version via your version manager
λ chruby 1.9.3
### Ensure your version manager p...
See :hover state in Chrome Developer Tools
...t not if you make changes onhover using JS.
– matthew_360
Feb 6 '15 at 16:31
Here's a quick video I threw together dem...
How do I compare two hashes?
...> 3}
hash1 == hash2 # => true
hash1 == hash3 # => false
hash1.to_a == hash2.to_a # => true
hash1.to_a == hash3.to_a # => false
You can convert the hashes to arrays, then get their difference:
hash3.to_a - hash1.to_a # => [["c", 3]]
if (hash3.size > hash1.size)
differ...
How to remove all the occurrences of a char in c++ string
...on for you, like:
#include <boost/algorithm/string.hpp>
boost::erase_all(str, "a");
All of this is well-documented on reference websites. But if you didn't know of these functions, you could easily do this kind of things by hand:
std::string output;
output.reserve(str.size()); // optional,...
Get the date (a day before current time) in Bash
... a one-liner, so cut and paste should work -- no line endings assumed. date_days_past () { days_past=${1:-0}; if ! date -v-${days_past}d +%Y%m%d 2>/dev/null; then date --date="-${days_past} day" +%Y%m%d; fi }
– Noah Spurrier
May 16 '16 at 21:29
...
How can I change the language (to english) in Oracle SQL Developer?
... language:
IncludeConfFile ../../ide/bin/ide.conf
SetJavaHome D:\jdk1.6.0_25
AddVMOption -Doracle.ide.util.AddinPolicyUtils.OVERRIDE_FLAG=true
AddVMOption -Dsun.java2d.ddoffscreen=false
AddVMOption -Dwindows.shell.font.languages=
AddVMOption -Duser.language=fr
AddVMOption -Duser.country=FR
Add...