本文整理汇总了TypeScript中lodash.isNull函数的典型用法代码示例。如果您正苦于以下问题:TypeScript isNull函数的具体用法?TypeScript isNull怎么用?TypeScript isNull使用的例子?那么, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了isNull函数的10个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的TypeScript代码示例。
示例1:
component.isToggled().then(isToggled => {
// use option if available, otherwise use detected state
toggledAtStart = _.isNull(options.toggledAtStart) ? isToggled : options.toggledAtStart;
// use option if available, otherwise use inverse of toggledAtStart
toggledAtEnd = _.isNull(options.toggledAtEnd) ? !toggledAtStart : options.toggledAtEnd;
});
示例2: deepDiff
deepDiff(one: Object, two: Object, path: string = ''): IDeepDiff[] {
let result: IDeepDiff[] = [];
for (var key of _.keys(one)) {
let concatPath: string = path ? path + '.' + key : key;
if (_.isPlainObject(one[key])) {
if (!_.has(two, key)) {
result.push(new DeepDiff('deleted', concatPath, one[key], null));
} else {
result = _.concat(result, this.deepDiff(one[key], two[key], path ? path + '.' + key : key));
}
} else if (_.isBoolean(one[key]) || _.isDate(one[key]) || _.isNumber(one[key])
|| _.isNull(one[key]) || _.isRegExp(one[key]) || _.isString(one[key])) {
if (!_.has(two, key)) {
result.push(new DeepDiff('deleted', concatPath, one[key], null));
} else if (_.get(one, key) !== _.get(two, key)) {
result.push(new DeepDiff('edited', concatPath, one[key], two[key]));
}
} else if (_.isArray(one[key]) && _.isArray(two[key]) && !_.isEqual(one[key], two[key])) {
result.push(new DeepDiff('array', concatPath, one[key], two[key]));
} else if (!_.has(two, key)) {
result.push(new DeepDiff('deleted', concatPath, one[key], null));
}
}
for (var key of _.keys(two)) {
let concatPath: string = path ? path + '.' + key : key;
if (!_.has(one, key)) {
if (_.isPlainObject(two[key]) || _.isBoolean(two[key]) || _.isDate(two[key]) || _.isNumber(two[key])
|| _.isNull(two[key]) || _.isRegExp(two[key]) || _.isString(two[key]) || _.isArray(two[key])) {
result.push(new DeepDiff('created', concatPath, null, two[key]));
}
}
}
return result;
}
示例3:
_.forEach(lines, line => {
if (!_.isNull(line.match(IMPORT_REGEX))) {
const dependencyMatch = line.match(DEPENDENCY_PATH_REGEX);
if (!_.isNull(dependencyMatch)) {
const dependencyPath = dependencyMatch[1];
const basenName = path.basename(dependencyPath);
dependencies.push(basenName);
}
}
});
示例4:
const res = _.reduce(data, (final, item) => {
if (item.kind === 'E') {
const isLhsNullOrDash = _.isNull(item.lhs) || item.lhs === '-'
const isRhsNullOrDash = _.isNull(item.rhs) || item.rhs === '-'
if (isLhsNullOrDash && isRhsNullOrDash) { return final }
}
final.push(item)
return final
}, [])
示例5: constructor
constructor(action: DiffAction, propertyPath: string, oldValue: any, newValue: any) {
this.action = action;
this.created = action === 'created' ? true : undefined;
this.edited = action === 'edited' ? true : undefined;
this.deleted = action === 'deleted' ? true : undefined;
this.array = action === 'array' ? true : undefined;
this.propertyPath = propertyPath;
this.oldValue = !_.isNull(oldValue) && !_.isUndefined(oldValue) && action !== 'created' ? oldValue : undefined;
this.newValue = !_.isNull(newValue) && !_.isUndefined(newValue) && action !== 'deleted' ? newValue : undefined;
if (action === 'array') {
this.setArrayDiffs(oldValue, newValue);
}
}
示例6: q
return new q(function(resolve, reject) {
if (!_.isNull(self.process)) {
timeout = self._timeout(function daemonProcessTimeout() {
self.process.kill();
self.process = null;
reject(new Error(Daemon.debug("Process didnt respond and was killed")));
}, wait ? wait * 1000 : 5000);
self
.call("stop")
.then(
function daemonProcessStopSuccess() {
clearTimeout(timeout);
self.process = null;
resolve("Stopped " + self.name);
},
function daemonProcessStopFailed(err) {
clearTimeout(timeout);
reject(new Error(Daemon.debug(err)));
}
)
.done();
} else {
reject(new Error(Daemon.debug("Process wasnt started")));
}
});
示例7: start
/**
* Starts the daemon process.
* Throws an error if the path doesn't exists.
*
* @throws Error
* @returns {boolean}
*/
start() {
var self = this;
if (_.isNull(this.process)) {
self._pathExists();
try {
self.process = self.spawn(this.opts.path, this.opts.args);
self.process.on("close", function daemonProcessClose() {
Daemon.debug("Process closed");
self.process = null;
self.emit("close");
});
return true;
} catch (e) {
self.process = null;
Daemon.debug(e);
return false;
}
} else {
return false;
}
}
示例8: listen
/**
* Listen the RPC on the defined port
*
* @returns {RPC}
*/
listen() {
if (_.isNull(this._server)) {
RPC.debug("Listening on port " + this.opts.port);
var func;
switch (this.opts.mode) {
case "both":
func = this.server.listenHybrid;
break;
case "http":
func = this.server.listen;
break;
case "tcp":
func = this.server.listenRaw;
break;
}
this._server = func.call(this.server, this.opts.port, this.opts.host);
} else {
throw new Error(
RPC.debug("Server already listening on port " + this.opts.port)
);
}
return this;
}
示例9: Error
selectionSet.selections.forEach((selection) => {
if (selection.kind !== 'Field') {
throw new Error('Only fields supported so far, not fragments.');
}
const field = selection as Field;
const storeFieldKey = storeKeyNameFromField(field);
const resultFieldKey = resultKeyNameFromField(field);
if (! has(storeObj, storeFieldKey)) {
if (throwOnMissingField) {
throw new Error(`Can't find field ${storeFieldKey} on object ${storeObj}.`);
}
missingSelections.push(field);
return;
}
if (! field.selectionSet) {
result[resultFieldKey] = storeObj[storeFieldKey];
return;
}
if (isNull(storeObj[storeFieldKey])) {
// Basically any field in a GraphQL response can be null
result[resultFieldKey] = null;
return;
}
if (isArray(storeObj[storeFieldKey])) {
result[resultFieldKey] = storeObj[storeFieldKey].map((id) => {
const itemDiffResult = diffSelectionSetAgainstStore({
store,
throwOnMissingField,
rootId: id,
selectionSet: field.selectionSet,
});
itemDiffResult.missingSelectionSets.forEach(
itemSelectionSet => missingSelectionSets.push(itemSelectionSet));
return itemDiffResult.result;
});
return;
}
const subObjDiffResult = diffSelectionSetAgainstStore({
store,
throwOnMissingField,
rootId: storeObj[storeFieldKey],
selectionSet: field.selectionSet,
});
// This is a nested query
subObjDiffResult.missingSelectionSets.forEach(
subObjSelectionSet => missingSelectionSets.push(subObjSelectionSet));
result[resultFieldKey] = subObjDiffResult.result;
});
示例10: _onTransactionSentAsync
private async _onTransactionSentAsync(
txData: MaybeFakeTxData,
err: Error | null,
txHash: string | undefined,
cb: Callback,
): Promise<void> {
if (!txData.isFakeTransaction) {
// This transaction is a usual ttransaction. Not a call executed as one.
// And we don't want it to be executed within a snapshotting period
await this._lock.acquire();
}
if (_.isNull(err)) {
const toAddress = _.isUndefined(txData.to) || txData.to === '0x0' ? constants.NEW_CONTRACT : txData.to;
await this._recordTxTraceAsync(toAddress, txData.data, txHash as string);
} else {
const payload = {
method: 'eth_getBlockByNumber',
params: ['latest', true],
};
const jsonRPCResponsePayload = await this.emitPayloadAsync(payload);
const transactions = jsonRPCResponsePayload.result.transactions;
for (const transaction of transactions) {
const toAddress = _.isUndefined(txData.to) || txData.to === '0x0' ? constants.NEW_CONTRACT : txData.to;
await this._recordTxTraceAsync(toAddress, transaction.data, transaction.hash);
}
}
if (!txData.isFakeTransaction) {
// This transaction is a usual ttransaction. Not a call executed as one.
// And we don't want it to be executed within a snapshotting period
this._lock.release();
}
cb();
}