language
stringclasses
2 values
func_code_string
stringlengths
63
466k
java
@Pure public double distanceToBusStop() { final Point2d p1 = getPosition2D(); if (p1 != null) { final BusStop stop = getBusStop(); if (stop != null) { final Point2d p2 = stop.getPosition2D(); if (p2 != null) { return p1.getDistance(p2); } } } return Double.NaN; }
java
public static EquivalentFragmentSet label(VarProperty varProperty, Variable type, ImmutableSet<Label> labels) { return new AutoValue_LabelFragmentSet(varProperty, type, labels); }
python
def search_genotype_phenotype( self, phenotype_association_set_id=None, feature_ids=None, phenotype_ids=None, evidence=None): """ Returns an iterator over the GeneotypePhenotype associations from the server """ request = protocol.SearchGenotypePhenotypeReq...
java
@Override public Object eGet(int featureID, boolean resolve, boolean coreType) { switch (featureID) { case TypesPackage.JVM_WILDCARD_TYPE_REFERENCE__CONSTRAINTS: return getConstraints(); } return super.eGet(featureID, resolve, coreType); }
python
def flairlist(self, r, limit=1000, after=None, before=None): """Login required. Gets flairlist for subreddit `r`. See https://github.com/reddit/reddit/wiki/API%3A-flairlist. However, the wiki docs are wrong (as of 2012/5/4). Returns :class:`things.ListBlob` of :class:`things.Blob` objects, e...
java
@Override public Object resolveMostSpecificModelWithName(Resource resource, String name) { if (resource == null) { throw new IllegalArgumentException("Method argument resource must not be null."); } if (name == null) { throw new IllegalArgumentException("Method argume...
java
public Set<String> keys(String pattern) { Jedis jedis = getJedis(); try { return jedis.keys(pattern); } finally {close(jedis);} }
java
protected long[] getSampleSizes(long startSample, long endSample, Track track, int sequenceNumber) { List<Sample> samples = getSamples(startSample, endSample, track); long[] sampleSizes = new long[samples.size()]; for (int i = 0; i < sampleSizes.length; i++) { sampleSizes[i] = sampl...
java
public long getJsCacheResultDeadline(JsCacheResult jcr) { Calendar deadline = getNowCalendar(); if ((jcr.year() + jcr.month() + jcr.day() + jcr.hour() + jcr.minute() + jcr.second() + jcr.millisecond()) == 0) { deadline.add(Calendar.YEAR, 1); } else { deadline.add(Calendar.YEAR, jcr.year()); deadlin...
java
public static SettingsCommandUser build(String[] params) { GroupedOptions options = GroupedOptions.select(params, new Options(new Uncertainty()), new Options(new Duration()), new Options(new Count())); if (options == null) { printHe...
java
@Override public int getIndexOfChild(Object parentObj, Object childObj) { if (debugger == null) { return -1; } VariableNode parent = (VariableNode) parentObj; VariableNode child = (VariableNode) childObj; VariableNode[] children = children(parent); for (in...
python
def describe(self, **kwargs): """ :returns: A hash containing attributes of the project or container. :rtype: dict Returns a hash with key-value pairs as specified by the API specification for the `/project-xxxx/describe <https://wiki.dnanexus.com/API-Specification-v1.0....
java
@Override public boolean validate(final Problems problems, final String compName, final String model) { final char[] chars = model.toCharArray(); for (final char c : chars) { if (Character.isWhitespace(c)) { problems.add(ValidationBundle.getMessage(MayNotContainSpacesValidator.class, "MAY_NOT_CONTAIN_WHITES...
python
def dragEnterEvent( self, event ): """ Processes the drag drop event using the filter set by the \ setDragDropFilter :param event | <QDragEvent> """ filt = self.dragDropFilter() if ( not filt ): super(XCalendarWidget, self).dragE...
python
def close(self, force=False): """This closes the connection with the child application. Note that calling close() more than once is valid. This emulates standard Python behavior with files. Set force to True if you want to make sure that the child is terminated (SIGKILL is sent if the ch...
java
public static inat_stats[] get(nitro_service service) throws Exception{ inat_stats obj = new inat_stats(); inat_stats[] response = (inat_stats[])obj.stat_resources(service); return response; }
python
def put(self, item, block=True, timeout=None): '''Put an item into the queue. If optional args 'block' is true and 'timeout' is None (the default), block if necessary until a free slot is available. If 'timeout' is a non-negative number, it blocks at most 'timeout' seconds and raises ...
python
def indices_outside_times(times, start, end): """ Return an index array into times that like outside the durations defined by start end arrays Parameters ---------- times: numpy.ndarray Array of times start: numpy.ndarray Array of duration start times end: numpy.ndarray ...
java
private Project.Tasks.Task.PredecessorLink writePredecessor(Integer taskID, RelationType type, Duration lag) { Project.Tasks.Task.PredecessorLink link = m_factory.createProjectTasksTaskPredecessorLink(); link.setPredecessorUID(NumberHelper.getBigInteger(taskID)); link.setType(BigInteger.valueOf(ty...
python
def _storage_list_buckets(project, pattern): """ List all storage buckets that match a pattern. """ data = [{'Bucket': 'gs://' + bucket.name, 'Created': bucket.metadata.created_on} for bucket in datalab.storage.Buckets(project_id=project) if fnmatch.fnmatch(bucket.name, pattern)] return datala...
python
def _show_loading_page(self): """Show animation while the kernel is loading.""" self.shellwidget.hide() self.infowidget.show() self.info_page = self.loading_page self.set_info_page()
python
def mouseDoubleClickEvent(self, event): """Launches an editor for the component, if the mouse cursor is over an item""" if self.mode == BuildMode: if event.button() == QtCore.Qt.LeftButton: index = self.indexAt(event.pos()) self.edit(index)
python
def fit(self, X): """Fit Kernel density estimation to an list of values. Args: X: 1-d `np.ndarray` or `pd.Series` or `list` datapoints to be estimated from. This function will fit a gaussian_kde model to a list of datapoints and store it as a class attribute. """ ...
java
public static Request configure(Config config, Request request) { String apiVersion = config.apiVersion(); Endpoint endpoint = Endpoint.byHost.get(request.url().host()); if (endpoint == null) { throw new UnsupportedOperationException("unknown endpoint: " + request.url().host()); ...
java
public HyphenationEvent getHyphenation() { if (attributes == null) return null; return (HyphenationEvent) attributes.get(Chunk.HYPHENATION); }
java
public String convertIfcPerformanceHistoryTypeEnumToString(EDataType eDataType, Object instanceValue) { return instanceValue == null ? null : instanceValue.toString(); }
python
def upgrade(dbname, connect_str, alembic_conf): """ Get the database's upgrade lock and run alembic. :param dbname: Name of the database to upgrade/create :param connect_str: Connection string to the database (usually Flask's SQLALCHEMY_DATABASE_URI) :param alembic_conf: location of alembic.ini ...
java
private List<Dependency> getProvisionableDependencies() { List<Dependency> dependencies = new ArrayList<Dependency>(); getLog().info( "Adding dependencies in scope " + dependencyScope ); for( Dependency d : getDependencies() ) { if( d.getScope() != null && d.getScope().eq...
java
private void instanceAlreadyLoaded( final Tuple resultset, final int i, //TODO create an interface for this usage final OgmEntityPersister persister, final org.hibernate.engine.spi.EntityKey key, final Object object, final LockMode lockMode, final SharedSessionContractImplementor session) throws Hiber...
python
def fit_caltrack_usage_per_day_model( data, fit_cdd=True, use_billing_presets=False, minimum_non_zero_cdd=10, minimum_non_zero_hdd=10, minimum_total_cdd=20, minimum_total_hdd=20, beta_cdd_maximum_p_value=1, beta_hdd_maximum_p_value=1, weights_col=None, fit_intercept_only=True...
java
private TypeArgSignature parseTypeArg() { int ch = peekChar(); switch (ch) { case '*': return new TypeArgSignature( (char) nextChar(TypeArgSignature.UNBOUNDED_WILDCARD), null); case '+': return new TypeArgSignature( (char) nextChar(TypeArgSignature.UPPERBOUND_WILDCARD), parseFieldT...
java
@Override public void onAdd(Attack attack) { notifyWebSocket("attack", attack); logger.info("Reporter observed attack by user [" + attack.getUser().getUsername() + "]"); }
java
public MethodInfo getInitializer() { int size = mMethods.size(); for (int i=0; i<size; i++) { MethodInfo method = mMethods.get(i); if ("<clinit>".equals(method.getName())) { return method; } } return null; }
java
public <T> Message body(T body, Charset charset) { messageWriter.writeBody(body, charset); return this; }
python
def nf_input_to_cl(inp): """Convert an input description into command line argument. """ sep = " " if inp.get("separate") else "" val = "'%s'" % inp.get("default") if inp.get("default") else "$%s" % inp["name"] return "%s%s%s" % (inp["prefix"], sep, val)
python
def _get_regional_term(self, C, imt, vs30, rrup): """ Compute regional term for Japan. See page 1043 """ f3 = interpolate.interp1d( [150, 250, 350, 450, 600, 850, 1150, 2000], [C['a36'], C['a37'], C['a38'], C['a39'], C['a40'], C['a41'], C['a42'], C['a...
python
def _get_relation_value(self, dictionary, key, type): """ Get the value of the relationship by one or many type. :type dictionary: dict :type key: str :type type: str """ value = dictionary[key] if type == 'one': return value[0] retu...
java
public Object[] readStatement(Statement statement, QueryParameters params) throws SQLException { return new Object[params.orderSize()]; }
python
def spawn(self, channels, ax): """ Spawns a graphical gate that can be used to update the coordinates of the current gate. """ if _check_spawnable(self.source_channels, channels): sgate = self.gate_type(self.verts, ax, channels) self.spawn_list.append(sgate) return sg...
java
public static <T> Mono<T> illegalArgument(String format, Object... args) { String message = String.format(format, args); return Mono.error(new IllegalArgumentException(message)); }
python
def parameter(self, parser): """ Return a parser the parses parameters. """ return (Suppress(self.syntax.params_start).leaveWhitespace() + Group(parser) + Suppress(self.syntax.params_stop))
python
def install_package(context): """Attempts to install the sdist and wheel.""" if not context.dry_run and build_distributions(context): with util.mktmpdir() as tmp_dir: venv.create_venv(tmp_dir=tmp_dir) for distribution in Path('dist').files(): try: ...
java
public DirRecord newRecord(String entryDn) throws NamingException { DirRecord rec = new BasicDirRecord(); rec.setDn(entryDn); return rec; }
java
@Override public R visitIntersection(IntersectionType t, P p) { return visitUnknown(t, p); }
java
private void addClasses(Class<?>[] classes, HashSet<Class<?>> result){ if(isNull(classes) || classes.length==0) Error.globalClassesAbsent(configuredClass); for (Class<?> classe : classes) result.add(classe); }
java
public static Years yearsBetween(ReadablePartial start, ReadablePartial end) { if (start instanceof LocalDate && end instanceof LocalDate) { Chronology chrono = DateTimeUtils.getChronology(start.getChronology()); int years = chrono.years().getDifference( ((LocalDate...
python
def semid(broker): """Command: semids""" source = broker[DefaultSpecs.ipcs_s].content results = set() for s in source: s_splits = s.split() # key semid owner perms nsems # 0x00000000 65536 apache 600 1 ...
python
def setCurrentPlugin( self, plugin ): """ Sets the current plugin item to the inputed plugin. :param plugin | <XWizardPlugin> || None """ item = self.uiWizardTABLE.currentItem() if ( not item ): return None return item.plugin...
python
def WmiQueryFromClient(args): """Run the WMI query and return the data.""" query = args.query base_object = args.base_object or r"winmgmts:\root\cimv2" if not query.upper().startswith("SELECT "): raise RuntimeError("Only SELECT WMI queries allowed.") for response_dict in RunWMIQuery(query, baseobj=base_...
java
public final boolean isValid(Class < T > javaClass, CobolContext cobolContext, byte[] hostData, int start) { int hostBytesLen = getBytesLen(); // Is buffer large enough to contain this type? if (hostData.length < start + hostBytesLen) { return false; } ...
python
def _ParameterDecorator(naming_type, testcases): """Implementation of the parameterization decorators. Args: naming_type: The naming type. testcases: Testcase parameters. Returns: A function for modifying the decorated object. """ def _Apply(obj): if isinstance(obj, type): _ModifyClass...
java
int handleNumbers(String line, BitSet numberBitSet, int startingPoint) { int end = startingPoint + 1; while (end < line.length() && Character.isDigit(line.charAt(end))) { end++; } if (end == line.length()) { if (Character.isDigit(line.charAt(line.length() - 1))) { numberBitSet.set(st...
python
def install_frontend(instance='default', forcereload=False, forcerebuild=False, forcecopy=True, install=True, development=False, build_type='dist'): """Builds and installs the frontend""" hfoslog("Updating frontend components", emitter='BUILDER') components = {} loadable_components...
python
def close_process_handles(self): """ Closes all open handles to processes in this snapshot. """ for pid in self.get_process_ids(): aProcess = self.get_process(pid) try: aProcess.close_handle() except Exception: e = sys.e...
python
def connectRelay(self): """Builds the target protocol and connects it to the relay transport. """ self.protocol = self.connector.buildProtocol(None) self.connected = True self.protocol.makeConnection(self)
python
def message_handler(stream, type_, from_, cb): """ Context manager to temporarily register a callback to handle messages on a :class:`StanzaStream`. :param stream: Stanza stream to register the coroutine at :type stream: :class:`StanzaStream` :param type_: Message type to listen for, or :data:`...
java
@Override public void eUnset(int featureID) { switch (featureID) { case AfplibPackage.BFN__RS_NAME: setRSName(RS_NAME_EDEFAULT); return; case AfplibPackage.BFN__TRIPLETS: getTriplets().clear(); return; } super.eUnset(featureID); }
java
public OperationStatusResponseInner beginReimageAll(String resourceGroupName, String vmScaleSetName) { return beginReimageAllWithServiceResponseAsync(resourceGroupName, vmScaleSetName).toBlocking().single().body(); }
java
private static void addOrder(Criteria c, String sort, String order, boolean ignoreCase) { if (ORDER_DESC.equals(order)) { c.addOrder(ignoreCase ? Order.desc(sort).ignoreCase() : Order.desc(sort)); } else { c.addOrder(ignoreCase ? Order.asc(sort).ignoreCase() : Order.asc(s...
java
public static <T> MemcachedClientBuilder<T> newMessagePackClient(final Class<T> valueType) { return newMessagePackClient(DefaultMessagePackHolder.INSTANCE, valueType); }
python
def lookup_task(self, task): """ Looks up a task by name or by callable """ if isinstance(task, str): try: return self[task] except KeyError: pass raise TaskError('Unknown task %s' % task)
java
public void chooseChoiceIndex(int choiceIdx) throws Exception { List<Choice> choices = getCurrentChoices(); Assert(choiceIdx >= 0 && choiceIdx < choices.size(), "choice out of range"); // Replace callstack with the one from the thread at the choosing point, // so that we can jump into the right place in the fl...
python
def _validate_partition_boundary(boundary): ''' Ensure valid partition boundaries are supplied. ''' boundary = six.text_type(boundary) match = re.search(r'^([\d.]+)(\D*)$', boundary) if match: unit = match.group(2) if not unit or unit in VALID_UNITS: return raise ...
python
def run_qaml(self): """ Create and run the GenomeQAML system call """ logging.info('Running GenomeQAML quality assessment') qaml_call = 'classify.py -t {tf} -r {rf}'\ .format(tf=self.qaml_path, rf=self.qaml_report) make_path(self.reportpath...
python
def get_column_listing(self, table): """ Get the column listing for a given table. :param table: The table :type table: str :rtype: list """ sql = self._grammar.compile_column_exists() database = self._connection.get_database_name() table = self....
java
public void setTitle(final String TITLE) { if (null == title) { _title = TITLE; fireUpdateEvent(REDRAW_EVENT); } else { title.set(TITLE); } }
python
def read(self): """ Read the IDF file and the IDD file. If the IDD file had already been read, it will not be read again. Read populates the following data structures: - idfobjects : list - model : list - idd_info : list - idd_index : dict """ ...
java
public static String getFieldType(Field field) { FieldType type = field.getType(); if (type instanceof ScalarFieldType) { ScalarFieldType scalarFieldType = (ScalarFieldType) type; return ScalarFieldTypeUtil.getPrimitiveType(scalarFieldType); } if (type instanceof ...
python
def bytes_from_string(value): """Interpret human readable string value as bytes. Returns int """ BYTE_POWER = { 'K': 1, 'KB': 1, 'M': 2, 'MB': 2, 'G': 3, 'GB': 3, 'T': 4, 'TB': 4, 'P': 5, 'PB': 5, } if isinstance(va...
java
@Override public SIBusMessage[] processMsgSet(SIMessageHandle[] msgHandles, TransactionCommon transaction, BifurcatedConsumerSessionImpl owner, boolean unlock, ...
python
def generate_sample(self, start_state=None, size=1): """ Generator version of self.sample Return Type: ------------ List of State namedtuples, representing the assignment to all variables of the model. Examples: --------- >>> from pgmpy.factors.discrete ...
python
def lmpool(cvals): """ Load the variables contained in an internal buffer into the kernel pool. http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/lmpool_c.html :param cvals: list of strings. :type cvals: list of str """ lenvals = ctypes.c_int(len(max(cvals, key=len)) + 1) n =...
java
@Override protected SoyValue visitListLiteralNode(ListLiteralNode node) { List<SoyValue> values = this.visitChildren(node); return ListImpl.forProviderList(values); }
python
def account_setup(remote, token, resp): """Perform additional setup after user have been logged in. :param remote: The remote application. :param token: The token value. :param resp: The response. """ gh = github3.login(token=resp['access_token']) with db.session.begin_nested(): me ...
java
static private StringBuilder serializeChannel(StringBuilder buffer, OutboundChannelDefinition ocd, int order) throws NotSerializableException { if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) { Tr.debug(tc, "Serializing channel: " + order + " " + ocd.getOutboundFactory().getName());...
python
def get_account_from_name(self, name): """ Returns the account with the given name. :type name: string :param name: The name of the account. """ for account in self.accounts: if account.get_name() == name: return account return None
python
def extract_ref(scihdu, refhdu): """Extract section of the reference image that corresponds to the given science image. This only returns a view, not a copy of the reference image's array. Parameters ---------- scihdu, refhdu : obj Extension HDU's of the science and reference image...
python
def validate_implementation_for_auto_decode_and_soupify(func): """ Validate that :func:`auto_decode_and_soupify` is applicable to this function. If not applicable, a ``NotImplmentedError`` will be raised. """ arg_spec = inspect.getargspec(func) for arg in ["response", "html", "soup"]: if...
java
public Observable<Page<LocalNetworkGatewayInner>> listByResourceGroupAsync(final String resourceGroupName) { return listByResourceGroupWithServiceResponseAsync(resourceGroupName) .map(new Func1<ServiceResponse<Page<LocalNetworkGatewayInner>>, Page<LocalNetworkGatewayInner>>() { @Over...
java
public DescribeInstancePatchStatesForPatchGroupResult withInstancePatchStates(InstancePatchState... instancePatchStates) { if (this.instancePatchStates == null) { setInstancePatchStates(new com.amazonaws.internal.SdkInternalList<InstancePatchState>(instancePatchStates.length)); } for...
java
public Iterator<?> xpathIterator(Collection<?> collection, String query) { JXPathContext pathContext = JXPathContext.newContext(collection); Iterator<?> result = null; try { result = pathContext.iteratePointers(query); } catch (JXPathNotFoundException e) { logger.log(Level.WARNING, "JXPath ...
java
protected Formatter<VersionIdentifier> parseSubFormatter(CharSequenceScanner scanner, String formatPattern, StringBuilder infixBuffer, FormatPatternStatus status) { char c = scanner.next(); if (c == 'V') { char segment = scanner.forceNext(); if (segment == '\0') { throw new IllegalSta...
java
public <S, R> AnimaQuery<T> in(TypeFunction<T, R> function, List<S> values) { String columnName = AnimaUtils.getLambdaColumnName(function); return this.in(columnName, values); }
java
private void updateLocaleVariants(ResourceBrowser rsBrowser, String path, Set<String> localeVariants) { Set<String> skinPaths = rsBrowser.getResourceNames(path); for (Iterator<String> itSkinPath = skinPaths.iterator(); itSkinPath.hasNext();) { String skinPath = path + itSkinPath.next(); if (rsBrowser.isDirec...
java
private String getServiceIdFromMavenBundlePlugin() { Plugin bundlePlugin = project.getBuildPlugins().stream() .filter(plugin -> StringUtils.equals(plugin.getKey(), MAVEN_BUNDLE_PLUGIN_ID)) .findFirst().orElse(null); if (bundlePlugin != null) { Xpp3Dom configuration = (Xpp3Dom)bundlePlugin....
python
def init_distributed(cuda): """ Initializes distributed backend. :param cuda: (bool) if True initializes nccl backend, if False initializes gloo backend """ world_size = int(os.environ.get('WORLD_SIZE', 1)) distributed = (world_size > 1) if distributed: backend = 'nccl' if c...
python
def vectors2angle(v1, v2): """ Returns the angle in radians between vectors 'v1' and 'v2'. :param v1: vector, a numpy array :param v2: vector, a numpy array :returns: the angle in radians between the two vetors """ cosang = np.dot(v1, v2) sinang = np.linalg.norm(np.c...
java
@XmlElementDecl(namespace = "urn:oasis:names:tc:xacml:3.0:core:schema:wd-17", name = "AssociatedAdvice") public JAXBElement<AssociatedAdviceType> createAssociatedAdvice(AssociatedAdviceType value) { return new JAXBElement<AssociatedAdviceType>(_AssociatedAdvice_QNAME, AssociatedAdviceType.class, null, value...
java
public static long[] getArrowStrides(INDArray arr) { long[] ret = new long[arr.rank()]; for(int i = 0; i < arr.rank(); i++) { ret[i] = arr.stride(i) * arr.data().getElementSize(); } return ret; }
python
def _scons_syntax_error(e): """Handle syntax errors. Print out a message and show where the error occurred. """ etype, value, tb = sys.exc_info() lines = traceback.format_exception_only(etype, value) for line in lines: sys.stderr.write(line+'\n') sys.exit(2)
python
def create_instance( self, parent, instance_id, instance, retry=google.api_core.gapic_v1.method.DEFAULT, timeout=google.api_core.gapic_v1.method.DEFAULT, metadata=None, ): """ Creates a Redis instance based on the specified tier and memory size...
java
public Class<?> getArrayOrCollectionComponentType() { if (!isCollection() && !isArray()) { throw new IllegalStateException(); } if (isCollection()) { Type type = field.getGenericType(); if (type instanceof ParameterizedType) { return toClass((...
java
public static void upsertJndiObjectResource(DbConn cnx, JndiObjectResourceDto dto) { if (dto.getId() != null) { QueryResult qr = cnx.runUpdate("jndi_update_changed_by_id", dto.getAuth(), dto.getDescription(), dto.getFactory(), dto.getName(), dto.getSingleton(), dto.ge...
python
def verify(zone): ''' Check to make sure the configuration of the specified zone can safely be installed on the machine. zone : string name of the zone CLI Example: .. code-block:: bash salt '*' zoneadm.verify dolores ''' ret = {'status': True} ## verify zone ...
python
def djd_to_datetime(djd, tz='UTC'): """ Converts a Dublin Julian Day float to a datetime.datetime object Parameters ---------- djd : float fractional days since 12/31/1899+0000 tz : str, default 'UTC' timezone to localize the result to Returns ------- datetime.datet...
python
def sendJobsQuery(self, jobExecTopicType, jobId=None): """ **Description** Publishes an MQTT jobs related request for a potentially specific jobId (or wildcard) **Syntax** .. code:: python #send a request to describe the next job myAWSIoTMQTTJobsClient.sen...
python
def language_name(self, text: str) -> str: """Predict the programming language name of the given source code. :param text: source code. :return: language name """ values = extract(text) input_fn = _to_func(([values], [])) pos: int = next(self._classifier.predict_...
python
def set_y(self, y): "Set y position and reset x" self.x=self.l_margin if(y>=0): self.y=y else: self.y=self.h+y
python
def _parse_format_pages_isbn(html_chunk): """ Parse format, number of pages and ISBN. Args: html_chunk (obj): HTMLElement containing slice of the page with details. Returns: tuple: (format, pages, isbn), all as string. """ ppi = get_first_content( html_chunk.find("div",...
python
def filter_enum(pred, enum): """ Create a new enumeration containing only items filtered from another enumeration. Hidden enum items in the original enumeration are excluded. :type pred: ``Callable[[`EnumItem`], bool]`` :param pred: Predicate that will keep items for which the result is true. ...