buffalo | Rapid Web Development w/ Go | Web Framework library
kandi X-RAY | buffalo Summary
kandi X-RAY | buffalo Summary
A Go web development eco-system, designed to make your project easier. Buffalo helps you to generate a web project that already has everything from front-end (JavaScript, SCSS, etc.) to the back-end (database, routing, etc.) already hooked up and ready to run. From there it provides easy APIs to build your web application quickly in Go. Buffalo isn't just a framework; it's a holistic web development environment and project structure that lets developers get straight to the business of, well, building their business. I :heart: web dev in go again - Brian Ketelsen.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of buffalo
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Trending Discussions on buffalo
QUESTION
I used ! for null safety. But I am Getting unexpected null value error. When I don't use ! it's show me expected a value of type 'List' but got one of type Null. Where I should change my code? In the quiz.dart file I am facing the problem. Here is my main.dart file
...ANSWER
Answered 2022-Apr-15 at 19:30I believe the error you are getting is on this line:
...(questions[questionIndex]['answers']! as List).map((answer) {
The problem is that you typed answers
instead of answer
so you are getting a null value.
The !
does not provide any null safety, what it does is tell Dart that you are sure this value will never be null -- if it does end up being null then you will have an error.
A null safety operator would be ??
which lets you specific a default value in case there is a null. You could do something like:
questions[questionIndex]['questionText'] ?? "No more questions"
On another note, to make you code a little cleaner by just providing your Quiz
object with the question and answers and not making it do the indexing part:
QUESTION
More than ten million rows, painfully slow. Currently using 'LIKE' to count the number of hits:
...ANSWER
Answered 2022-Mar-28 at 03:02Q: Am I correct in thinking that I want to apply FULLTEXT index to each field and replace the query with something like this to increase speed?
A: Yes, you're correct at adding index to make improve the performance.
Q: Am I correct in thinking that this would produce identical results to my LIKE query?
A: I'm not sure cause I couldn't find any clause related to CONTAINS in MySQL. But please refer this as a solution for full-text indexs.
Q: Am I correct in thinking that this would be many times faster, with the only downside being a huge increase in the storage size of the database?
A: Well, honestly speaking, it is not a good idea. Because text is unpredictable, it is not a good idea using text as index.
You might choose already your mind regardless of my thinking. But I hope you find another column for lower risk and lower cost to indexing. Thanks.
QUESTION
I am new to Laravel, coding and learning from YouTube and Stack Overflow. Thanks to all members of Stack Overflow who help me to understand the mistakes.
Now here I am Trying to show data in FullCalendar where I am getting data from controller Below is code
Controller
...ANSWER
Answered 2022-Mar-23 at 09:31Simply remove the parenthesis on the events, and it works
QUESTION
My attempt to parse XML using Linq to XML failed. Despite the fact that as you see ItemList[0] below, I can get the ItemList
has many XML element items of the list ItemList (variable)
, the result shows only one XML element of the ItemList [0]
in ItemList (variable)
. I need to print out all elements on the ItemList [n]
.
Main Code
...ANSWER
Answered 2022-Mar-22 at 08:43If you read the documentation for Element, it says:
Gets the first (in document order) child element with the specified XName.
Please notice how it says "first child". In your case you want to retrieve all children, so you need to call Elements.
To do that, add a for each loop inside your current one.
QUESTION
I am able to hide the toolbar icon but i don't have any idea how to positioning pagination bottom to top my another issue is I am trying to add two button (reset and apply )in view-Column toolbar. have. no idea how to customise the class here I am sharing image for reference as you can see pagination and filter align top right
I am also sharing my working repo please have a look on it. I would appreciate if someone help me to resolve this issue
...ANSWER
Answered 2022-Mar-21 at 10:11import * as React from "react";
import PropTypes from "prop-types";
import { alpha } from "@mui/material/styles";
import Box from "@mui/material/Box";
import Table from "@mui/material/Table";
import TableBody from "@mui/material/TableBody";
import TableCell from "@mui/material/TableCell";
import TableContainer from "@mui/material/TableContainer";
import TableHead from "@mui/material/TableHead";
import TablePagination from "@mui/material/TablePagination";
import TableRow from "@mui/material/TableRow";
import TableSortLabel from "@mui/material/TableSortLabel";
import Toolbar from "@mui/material/Toolbar";
import Typography from "@mui/material/Typography";
import Paper from "@mui/material/Paper";
import Checkbox from "@mui/material/Checkbox";
import IconButton from "@mui/material/IconButton";
import Tooltip from "@mui/material/Tooltip";
import FormControlLabel from "@mui/material/FormControlLabel";
import Switch from "@mui/material/Switch";
import DeleteIcon from "@mui/icons-material/Delete";
import FormatListBulletedIcon from "@mui/icons-material/FormatListBulleted";
import GridViewIcon from "@mui/icons-material/GridView";
import TuneIcon from "@mui/icons-material/Tune";
import { visuallyHidden } from "@mui/utils";
function createData(name, calories, fat, carbs, protein) {
return {
name,
calories,
fat,
carbs,
protein
};
}
const rows = [
createData("Cupcake", 305, 3.7, 67, 4.3),
createData("Donut", 452, 25.0, 51, 4.9),
createData("Eclair", 262, 16.0, 24, 6.0),
createData("Frozen yoghurt", 159, 6.0, 24, 4.0),
createData("Gingerbread", 356, 16.0, 49, 3.9),
createData("Honeycomb", 408, 3.2, 87, 6.5),
createData("Ice cream sandwich", 237, 9.0, 37, 4.3),
createData("Jelly Bean", 375, 0.0, 94, 0.0),
createData("KitKat", 518, 26.0, 65, 7.0),
createData("Lollipop", 392, 0.2, 98, 0.0),
createData("Marshmallow", 318, 0, 81, 2.0),
createData("Nougat", 360, 19.0, 9, 37.0),
createData("Oreo", 437, 18.0, 63, 4.0)
];
function descendingComparator(a, b, orderBy) {
if (b[orderBy] < a[orderBy]) {
return -1;
}
if (b[orderBy] > a[orderBy]) {
return 1;
}
return 0;
}
function getComparator(order, orderBy) {
return order === "desc"
? (a, b) => descendingComparator(a, b, orderBy)
: (a, b) => -descendingComparator(a, b, orderBy);
}
// This method is created for cross-browser compatibility, if you don't
// need to support IE11, you can use Array.prototype.sort() directly
function stableSort(array, comparator) {
const stabilizedThis = array.map((el, index) => [el, index]);
stabilizedThis.sort((a, b) => {
const order = comparator(a[0], b[0]);
if (order !== 0) {
return order;
}
return a[1] - b[1];
});
return stabilizedThis.map((el) => el[0]);
}
const headCells = [
{
id: "name",
numeric: false,
disablePadding: true,
label: "Dessert (100g serving)"
},
{
id: "calories",
numeric: true,
disablePadding: false,
label: "Calories"
},
{
id: "fat",
numeric: true,
disablePadding: false,
label: "Fat (g)"
},
{
id: "carbs",
numeric: true,
disablePadding: false,
label: "Carbs (g)"
},
{
id: "protein",
numeric: true,
disablePadding: false,
label: "Protein (g)"
}
];
function EnhancedTableHead(props) {
const {
onSelectAllClick,
order,
orderBy,
numSelected,
rowCount,
onRequestSort
} = props;
const createSortHandler = (property) => (event) => {
onRequestSort(event, property);
};
return (
0 && numSelected < rowCount}
checked={rowCount > 0 && numSelected === rowCount}
onChange={onSelectAllClick}
inputProps={{
"aria-label": "select all desserts"
}}
/>
{headCells.map((headCell) => (
{headCell.label}
{orderBy === headCell.id ? (
{order === "desc" ? "sorted descending" : "sorted ascending"}
) : null}
))}
);
}
EnhancedTableHead.propTypes = {
numSelected: PropTypes.number.isRequired,
onRequestSort: PropTypes.func.isRequired,
onSelectAllClick: PropTypes.func.isRequired,
order: PropTypes.oneOf(["asc", "desc"]).isRequired,
orderBy: PropTypes.string.isRequired,
rowCount: PropTypes.number.isRequired
};
const EnhancedTableToolbar = (props) => {
const {
numSelected,
rowsPerPageOptions,
component,
count,
rowsPerPage,
page,
onPageChange,
onRowsPerPageChange
} = props;
return (
0 && {
bgcolor: (theme) =>
alpha(
theme.palette.primary.main,
theme.palette.action.activatedOpacity
)
})
}}
>
{numSelected > 0 ? (
{numSelected} selected
) : (
Nutrition
)}
{numSelected > 0 ? (
) : (
<>
)}
);
};
EnhancedTableToolbar.propTypes = {
numSelected: PropTypes.number.isRequired
};
export default function EnhancedTable() {
const [order, setOrder] = React.useState("asc");
const [orderBy, setOrderBy] = React.useState("calories");
const [selected, setSelected] = React.useState([]);
const [page, setPage] = React.useState(0);
const [dense, setDense] = React.useState(false);
const [rowsPerPage, setRowsPerPage] = React.useState(5);
const handleRequestSort = (event, property) => {
const isAsc = orderBy === property && order === "asc";
setOrder(isAsc ? "desc" : "asc");
setOrderBy(property);
};
const handleSelectAllClick = (event) => {
if (event.target.checked) {
const newSelecteds = rows.map((n) => n.name);
setSelected(newSelecteds);
return;
}
setSelected([]);
};
const handleClick = (event, name) => {
const selectedIndex = selected.indexOf(name);
let newSelected = [];
if (selectedIndex === -1) {
newSelected = newSelected.concat(selected, name);
} else if (selectedIndex === 0) {
newSelected = newSelected.concat(selected.slice(1));
} else if (selectedIndex === selected.length - 1) {
newSelected = newSelected.concat(selected.slice(0, -1));
} else if (selectedIndex > 0) {
newSelected = newSelected.concat(
selected.slice(0, selectedIndex),
selected.slice(selectedIndex + 1)
);
}
setSelected(newSelected);
};
const handleChangePage = (event, newPage) => {
setPage(newPage);
};
const handleChangeRowsPerPage = (event) => {
setRowsPerPage(parseInt(event.target.value, 10));
setPage(0);
};
const handleChangeDense = (event) => {
setDense(event.target.checked);
};
const isSelected = (name) => selected.indexOf(name) !== -1;
// Avoid a layout jump when reaching the last page with empty rows.
const emptyRows =
page > 0 ? Math.max(0, (1 + page) * rowsPerPage - rows.length) : 0;
return (
{/* if you don't need to support IE11, you can replace the `stableSort` call with:
rows.slice().sort(getComparator(order, orderBy)) */}
{stableSort(rows, getComparator(order, orderBy))
.slice(page * rowsPerPage, page * rowsPerPage + rowsPerPage)
.map((row, index) => {
const isItemSelected = isSelected(row.name);
const labelId = `enhanced-table-checkbox-${index}`;
return (
handleClick(event, row.name)}
role="checkbox"
aria-checked={isItemSelected}
tabIndex={-1}
key={row.name}
selected={isItemSelected}
>
{row.name}
{row.calories}
{row.fat}
{row.carbs}
{row.protein}
);
})}
{emptyRows > 0 && (
)}
{/* }
label="Dense padding"
/> */}
);
}
QUESTION
I need to read lines of strings in a text file that represent movie showings and format them. I need to use sscanf
to scan the string saved by fgets
. My problem is how do I make sscanf
only read upto x amount of characters while also using [^]
specifier. Movie title lengths have a max length of 44. I know C has %0.*s
but I need to use it in combination with [^]
. I tried doing %0.44[^,]
but to no avail. My code is below. I have commented out what I though would be the solution.
ANSWER
Answered 2022-Mar-11 at 12:41sscanf(currentLine, "%[^,],%43[^,],%[^,]", movieTime, movieTitle, movieRating);
QUESTION
I am trying to extract the state from an address string and some of the addresses are canadian and some american. I think the regex is correct but it is creating an array of shape (29999,29999) and I'm not understanding why:
Here is a sample output of `data['Address']:
...ANSWER
Answered 2022-Mar-04 at 16:59Update
Try:
QUESTION
I'm trying to display a nested array in my screen (see array below), the first layer display correctly, but when I try to display the second one, it doesn't return anything, the items in the second layer array should be displayed only if selected=false
, that's why I decided to use a forEach
function first.
map
...ANSWER
Answered 2022-Mar-02 at 05:14import "./styles.css";
const data = {
additional: [
{
data: [
{
id: 0,
price: 0,
selected: false,
title: "Hot Sauce",
type: "Sauces"
},
{
id: 1,
price: 0,
selected: true,
title: "Medium Sauce",
type: "Sauces"
}
],
id: 1,
required: true,
title: "Sauces"
},
{
data: [
{
id: 0,
price: 1,
selected: true,
title: "Ranch",
type: "Sides"
},
{
id: 1,
price: 1,
selected: false,
title: "Blue Cheese",
type: "Sides"
}
],
id: 0,
required: false,
title: "Sides"
}
],
id: 0.103,
price: 6.95,
quantity: 1,
title: "Buffalo Wings"
};
export default function App() {
return (
Hello CodeSandbox
Start editing to see some magic happen!
Title: {data.title}
Price: {data.price.toFixed(2)}
Qty: {data.quantity}
Additional:
{data.additional.map((item, index) => {
return (
{item.title}:
{item.data
.filter((data) => !data.selected)
.map((data, dataIndex) => {
return (
-
{data.title} - {data.type}
);
})}
);
})}
);
}
QUESTION
I'm developing the feature in which when the user type in the TextInput
and it filters the items in the array data
and shows in the FlatList
the result of the search, at the moment it works when I start typing the first time I render the screen, but when I start cancelling the text in the TextInput
and try again it just returns empty arrays, and nothing shows in the FlatList
, and also in useEffect
I get the same array twice.
Array
...ANSWER
Answered 2022-Feb-22 at 14:27when you type in textInput you are searching from previous filtered data once the filtered data gets empty then all the next search will happen in empty array and you are just stuck with empty to avoid that take a dummy state which stores original data.
i have modified your code hope this helps
QUESTION
I have a few files that are named after rural properties like the following:
...ANSWER
Answered 2022-Jan-25 at 16:58This should do it:
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