大约有 40,000 项符合查询结果（耗时：0.0778秒） [XML]
Check if object value exists within a Javascript array of objects and if not add a new object to arr
...his is what I did in addition to @sagar-gavhane's answer
const newUser = {_id: 4, name: 'Adam'}
const users = [{_id: 1, name: 'Fred'}, {_id: 2, name: 'Ted'}, {_id: 3, 'Bill'}]
const userExists = users.some(user => user.name = newUser.name);
if(userExists) {
return new Error({error:'User exi...
How to test that no exception is thrown?
... test your functionality: if an exception is thrown the test will automatically fail. If no exception is thrown, your tests will all turn up green.
I have noticed this question garners interest from time to time so I'll expand a little.
Background to unit testing
When you're unit testing it's imp...
How to ignore the first line of data when processing CSV data?
... field names. you would then be able to access field values using row["1"] etc
share
|
improve this answer
|
follow
|
...
Get current directory name (without full path) in a Bash script
...ionality is silly, incurring performance impact (fork(), execve(), wait(), etc) for no reason.
– Charles Duffy
Jun 29 '13 at 18:30
4
...
How to convert decimal to hexadecimal in JavaScript
...
I am "pulling" numbers from an array ('255,0,55', etc) and the .toString(16) didn't work. All I got were the same numbers! I added the "Number" function to the front, and now it works! Only spent about four hours trying to find the solution!!
– Cristofa...
Can't use method return value in write context
...ral that's ok, but it's not strictly equivalent to empty(), because "", 0, etc. are "empty", but not null.
– Kornel
Apr 11 '14 at 11:19
|
sh...
Convert to binary and keep leading zeros in Python
...ction in Python. However, it always removes the leading zeros, which I actually need, such that the result is always 8-bit:
...
How to get the current time in milliseconds from C in Linux?
...
This can be achieved using the POSIX clock_gettime function.
In the current version of POSIX, gettimeofday is marked obsolete. This means it may be removed from a future version of the specification. Application writers are encouraged to use the clock_gettime functi...
node.js execute system command synchronously
...lling exec-sync or ffi on Windows has a huge overhead (VC++, SDKs, Python, etc), but this is lighter.
– Mendhak
Jan 2 '14 at 12:56
add a comment
|
...
Turning a Comma Separated string into individual rows
...
All the other methods to split string like XML, Tally table, while loop, etc.. have been blown away by this STRING_SPLIT function.
Here is an excellent article with performance comparison: Performance Surprises and Assumptions: STRING_SPLIT.
For older versions, using tally table here is one spli...