本文整理匯總了TypeScript中typescript-nullable.Nullable.maybe方法的典型用法代碼示例。如果您正苦於以下問題：TypeScript Nullable.maybe方法的具體用法？TypeScript Nullable.maybe怎麽用？TypeScript Nullable.maybe使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類typescript-nullable.Nullable的用法示例。
在下文中一共展示了Nullable.maybe方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: Error
const selectFilename = (state: State): string => {
// @TODO(James) fix this horrible code
let filename = Nullable.maybe(
'[name].js',
rc =>
Nullable.maybe(
'[name].js',
webpack =>
Nullable.maybe(
'[name].js',
output => output.filename,
webpack.output
),
rc.webpack
),
errorToNull(state.rc)
);
if (typeof filename === 'function') {
filename = filename(state);
if (typeof filename !== 'string') {
throw new Error('rc.webpack.filename function should return a string.');
}
}
return filename;
};示例2: errorToNull
const selectWebpackEntry = (state: State): webpack.Configuration['entry'] => {
let entry = Nullable.maybe(
'index.js',
rc => Nullable.maybe('index.js', webpack => webpack.entry, rc.webpack),
errorToNull(state.rc)
);
if (typeof entry === 'string') {
return path.join(selectAppPath(state), entry);
}
if (Array.isArray(entry)) {
return entry.map(e => path.join(selectAppPath(state), e));
}
if (typeof entry === 'object') {
for (const [key, value] of Object.entries(entry)) {
entry = {
...entry,
[key]: path.join(selectAppPath(state), value)
};
}
}
return entry;
};示例3:
rc =>
Nullable.maybe(
'',
mocha =>
Nullable.maybe(
[],
requires => requires.map(req => `--require ${req}`),
mocha.requires
).join(' '),
rc.mocha
),