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How to try convert a string to a Guid [duplicate]
...er something by Guid (since its primary key in a table) what will you send from the front in a request? Most likely a string in URL, but on back in the controller you would most like wanna use it as Guid. As for speed comparison: stackoverflow.com/questions/713109/…
– DanteTh...
The cause of “bad magic number” error when loading a workspace and how to avoid it?
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Also worth noting the following from a document by the R Core Team summarizing changes in versions of R after v3.5.0 (here):
R has new serialization format (version 3) which supports custom serialization of
ALTREP framework objects... Serialized data in fo...
What is “vectorization”?
... enabled via a compile option. More complex algorithms still require help from the programmer to generate good vector code.
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What is the difference between related SQLite data-types like INT, INTEGER, SMALLINT and TINYINT?
...g you used to know about standalone database datatypes
Read the above link from the SQLite site.
Take the types based off of your old schema, and see what they'd map to in SQLite
Migrate all the data to the SQLite database.
Note: The datatype limitations can be cumbersome, especially if you add ti...
Concept behind these four lines of tricky C code
...e question's conversion to pure C was done by the community, without input from the original asker.
Formally speaking, it's impossible to reason about this program because it's ill-formed (i.e. it's not legal C++). It violates C++11[basic.start.main]p3:
The function main shall not be used wit...
Soft keyboard open and close listener in an activity in Android
...user clicks on the first EditText and also when the soft keyboard closes from the same EditText on the back button press. Then I want to set some other View 's visibility to visible.
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The way to check a HDFS directory's size?
...iles. Without the -s option, the calculation is done by going 1-level deep from the given path.
The -h option will format file sizes in a human-readable fashion (e.g 64.0m instead of 67108864)
The -v option will display the names of columns as a header line.
The -x option will exclude snapshots from...
Django auto_now and auto_now_add
...cts I have written using Django, and so your save() would look like this:
from django.utils import timezone
class User(models.Model):
created = models.DateTimeField(editable=False)
modified = models.DateTimeField()
def save(self, *args, **kwargs):
''' On save, update ti...
Animate change of view background color on Android
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You can use new Property Animation Api for color animation:
int colorFrom = getResources().getColor(R.color.red);
int colorTo = getResources().getColor(R.color.blue);
ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(), colorFrom, colorTo);
colorAnimation.setDuration(250)...
How to center buttons in Twitter Bootstrap 3?
...ent, the element does not know the point to work out this auto calculation from so will not center itself as anticipated.
See an example of the code above here: https://jsfiddle.net/Seany84/2j9pxt1z/
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