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How to get key names from JSON using jq
...fy -r then you get a quoted string, which looks fine on-screen, but you usually don't want the quotes embedded in the string.
– MarkHu
Apr 26 '18 at 2:49
4
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Need to understand the usage of SemaphoreSlim
...at there won't be more than 10 workers doing this work at the same time.
Calling WaitAsync on the semaphore produces a task that will be completed when that thread has been given "access" to that token. await-ing that task lets the program continue execution when it is "allowed" to do so. Having ...
How to convert an image to base64 encoding?
...ove function like below:
echo '<img src="'.getDataURI('./images/my-file.svg').'" alt="">';
echo '<img src="'.getDataURI('./images/my-file.png').'" alt="">';
Note: The Mime-Type of the file will be added automatically (taking help from this PHP documentation).
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Is memcached a dinosaur in comparison to Redis? [closed]
...n linked to above is solid evidence that it has a real impact. Also I have confirmed this in my own benchmarks using Redis as a Zend_Cache backend; as concurrency increases Redis will plateau rather quickly compared to memcached.
– ColinM
Apr 16 '12 at 18:59
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Error: Tablespace for table xxx exists. Please DISCARD the tablespace before IMPORT
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Can confirm, the steps should be: 1. delete mysql/path/table_name.idb 2. add table_name.frm 3. DROP table_name
– Jeremy Dennen
Apr 10 '19 at 21:01
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Interview question: Check if one string is a rotation of other string [closed]
...ution will be the rotation difference (if they are rotated); an O(n) check confirms. The nice thing is that if there are two equal max values, then they are both also valid solutions. You can do the convolution with two FFT's and a dot product, and an iFFT, so nlogn + nlogn + n + nlogn + n == O(nl...
64-bit version of Boost for 64-bit windows
...icrosoft SDK Command prompt and use "setenv /Release /x64" which redefines all the paths.
– Budric
Dec 13 '11 at 16:59
2
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How should one use std::optional?
...std::string s, int& i);
Another way that this could be done is especially bad:
int* try_parse_int(std::string s); //return nullptr if fail
This requires dynamic memory allocation, worrying about ownership, etc. - always prefer one of the other two signatures above.
Another example:
clas...
How to configure PostgreSQL to accept all incoming connections
I've got a PostgreSQL data base that I'd like to configure to accept all incoming connections regardless of the source IP address. How can this be configured in the pg_hba.conf file? I'm using postgreSQL version 8.4.
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Visual Studio build fails: unable to copy exe-file from obj\debug to bin\debug
...it actually seems to work! I have tested this several times now, and I can confirm that when using an assembly version such as "2.0.*" I get the error, but when I instead use "2.0.0" it works as a charm! I urge more people to test this, and if you find it working please vote up this answer, because ...