alter | convert text to images | Data Manipulation library
kandi X-RAY | alter Summary
kandi X-RAY | alter Summary
convert text/code to images.
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QUESTION
First migration file:
ANSWER
Answered 2021-Jun-15 at 18:27change the posts migration post_id and author_id to this :
QUESTION
We have thousands of structured filenames stored in our database, and unfortunately many hundreds have been manually altered to names that do not follow our naming convention. Using regex, I'm trying to match the correct file names in order to identify all the misnamed ones. The files are all relative to a meeting agenda, and use the date, meeting type, Agenda Item#, and description in the name.
Our naming convention is yyyymmdd_aa[_bbb]_ccccc.pdf
where:
- yyyymmdd is a date (and may optionally use underscores such as yyyy_mm_dd)
- aa is a 2-3 character Meeting Type code
- bbb is an optional Agenda Item
- ccccc is a freeform variable length description of the file (alphanumeric only)
Example filenames:
...ANSWER
Answered 2021-Jun-15 at 17:46The optional identifier ?
is for the last thing, either a characters or group. So the expression ([a-z0-9]{1,3})_?
makes the underscore optional, but not the preceding group. The solution is to move the underscore into the parenthesis.
QUESTION
I expect that this code prints "0" since the starting size of the array is 0, but what it does is printing "1". Can someone explain me why, using Arrays.asList on an empty collection alter the size of the resulting collection? I know that "asList" gives back a fixed-size array but still I cannot imagine what's the reason behind that.
...ANSWER
Answered 2021-Jun-15 at 16:26Because you've made a list of byte arrays. Not a list of bytes.
In other words, your list contains 1 item: An empty byte array.
You can't easily turn a byte[]
into a List
. There are slightly less trivial ways to do it (just do the obvious thing: Write a for
loop), but note that a List
is about 10x more wasteful than a byte[]
. Generally, you don't 'want' a List
, unless you are really very sure you do. Just about every byte-stream related API takes a byte[]
, In/OutputStream
, or ByteBuffer
, and rarely if ever a List
, for example.
EDIT: To be clear, if the component type is not a primitive, then lists are just as efficient as arrays are, in practice more efficient (because it is cleaner code, and that is the only feasible road to a non-trivially-sized project that performs well). It's just collections-of-primitives that are, and it's the worst, by far, when we're talking about byte[]
.
QUESTION
I'm running the below sqlpackage
command against my sqlserver
:
ANSWER
Answered 2021-Jun-15 at 12:05I would recommend using /action:Script
(see here) to see which actions it will perform, most likely this will give you some clue as to which flags should be set/cleared.
-- Edit
According to this old answer you can disable deploying the database properties when designing the .dacpac.
If you want to override this behaviour when publishing the .dacpac, you should probably use the ScriptDatabaseOptions
property - see the whole list of switches here.
QUESTION
I'm having a problem with altering the value of a mutable map. I assume it's something to do with nullable types, but I'm not sure. The code producing the error is below:
...ANSWER
Answered 2021-Jun-15 at 08:46The statement map.getValue(num) += 1
is not allowed because the +=
operator is only defined in 2 cases:
- a plusAssign() operator is defined on the left operand's type (not the case for
Int
) - a plus() operator is defined on the left operand's type AND the left operand is a variable. In this case
+=
reassigns the variable on the left witholdValue.plus(the right operand)
.
The compiler tries to consider case #2 here because Int.plus(Int)
is defined, but the left operand is not a variable so it fails with the error message you mentioned.
You can't write this for the same reasons you can't write map.getValue(num) = 42
.
The correct way of mutating a value in a map is either via the set operator (like you did earlier with the syntax sugar map[num] = 0
), or via other mutating functions like merge.
In your case, merge
is nice because it can remove the special case altogether (it's only available on the JVM target though):
QUESTION
I'm doing some ETL, using the standard "Pre-Load" partition pattern: Load the data into a dated partition of a loading
table, then SWITCH that partition into the live
table.
I found these options for the SWITCH command:
...ANSWER
Answered 2021-Jun-15 at 06:44Looks the question was solved by @Larnu's comment, just add it as an answer to close the question.
If you are using Azure SQL Database, then what the error is telling you is true. Azure SQL Databases are what are known as Partially Contained databases; things like their USER objects have their own Password and the LOGIN objects on the server aren't used for connections. The CONNECTION permission is a server level permission, and thus not supported in Azure SQL Databases.
QUESTION
We are programmatically creating PDF using our in house lib (C++) by adding all the required objects so that PDF readers can render them properly. Currently we are enhancing the lib to support digital signatures in PDF. Our users will use USB token or Windows certificates to sign the PDF. On studying raw PDF file with digital signature, we were able to make sense of all the objects except for the contents of Sig type object.
...ANSWER
Answered 2021-Jun-10 at 16:48Ok, the signature container is embedded correctly.
But there are issues with the signature container itself:
Both in the
SignedData.digestAlgorithms
collection and in theSignerInfo.digestAlgorithm
value you have used the OID of SHA1withRSA, but that is a full signature algorithm, not the mere digest algorithm SHA1 expected there.Then the SHA1 hash of the signed bytes is BB78A402F7A537A34D6892B83881266501A691A8 but the hash you signed is 90E28B8A0D8E48691DAFE2BA10A4761FFFDCCD3D. This might be because you hash buffer2 and
buffer2 has empty contents data (/Contents <>)
The hex string delimiters '<' and '>' also belong to the contents value and, therefore, must also be removed in buffer2.
Furthermore, your signature is very weak:
- It uses SHA1 as hash algorithm. SHA1 meanwhile has been recognized as too weak a hash algorithm for document signatures.
- It doesn't use signed attributes, neither the ESS signing certificate nor the algorithm identifier protection attribute. Many validation policies require such special attributes.
QUESTION
A while ago I needed to move git managed code to a separate disconnected network. I was unaware of git bundle at the time and so just created a new git repo on the new host and copied the files. They were committed as an initial commit, and all development continued on the new repo.
Due to 'altered' requirements, I need to bring back the newer code to the old repo. Is it possible to use git bundle to do this to preserve all commit history? There has been no further commits to the old repo.
Thanks for any clues. Bob
...ANSWER
Answered 2021-Jun-12 at 22:17You cannot use git bundle
because:
As no direct connection between the repositories exists, the user must specify a basis for the bundle that is held by the destination repository: the bundle assumes that all objects in the basis are already in the destination repository.
In your case the new repository does not share anything with the old one, except for the working directory, which is not enough. In summary the last commit of the old repo should have the same hash of the first commit in the new repo.
You have another way, git format-patch
and git am
:
First you need to create a patch for each commit (except the first one) in the new repository:
QUESTION
I try to extract all single blocks from a block matrix. However the BlockMatrixClass from the library I am using only allows access through the following indices:
Dune::index_constant<0>(), Dune::index_constant<1>(),...
They resolve to std::integral_constant().
How I can alter the following code to be valid? Without changing the library.
...ANSWER
Answered 2021-Jun-14 at 18:30#include
#include
#include
template
void for_loop () {
if constexpr (index == end) {
return;
}
constexpr size_t i = index / 3;
constexpr size_t j = index % 3;
const auto& m = jacobian[Dune::index_constant()][Dune::index_constant()];
impl();
}
template
void for_loop_to() {
for_loop<0, end>();
}
int main ()
{
for_loop_to<9>();
}
QUESTION
I am not sure if a dynaimc serializer is what I need, as I did not exactly understand when to use it. Following problem:
My serializer returns a working/valid json, but in a suboptimal shape:
...ANSWER
Answered 2021-Jun-14 at 16:38Following Serializer will give the desired output:
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