大约有 30,000 项符合查询结果（耗时：0.0492秒） [XML]
How to export DataTable to Excel
... code, to convert DataTable to excel file as csv:
var lines = new List<string>();
string[] columnNames = dataTable.Columns
.Cast<DataColumn>()
.Select(column => column.ColumnName)
.ToArray();
var header = string.Join(",", columnNames.Select(name => $"\"{name}\""));
l...
Group by multiple columns in dplyr, using string vector input
... names, just in a formula instead. The point of the question is how to use strings so as to not have to type asihckhdoydk...
– Gregor Thomas
Jan 28 '15 at 0:18
...
How to implement a Map with multiple keys? [duplicate]
....collect.Table;
import com.google.common.collect.HashBasedTable;
Table<String, String, Integer> table = HashBasedTable.create();
The usage is really simple:
String row = "a";
String column = "b";
int value = 1;
if (!table.contains(row, column)) {
table.put(row, column, value);
}
Syst...
Import text file as single character string
How do you import a plain text file as single character string in R? I think that this will probably have a very simple answer but when I tried this today I found that I couldn't find a function to do this.
...
AppSettings get value from .config file
...
This works for me:
string value = System.Configuration.ConfigurationManager.AppSettings[key];
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The $.param( ) inverse function in JavaScript / jQuery
...rsion of a function I wrote a while ago to do something similar.
var QueryStringToHash = function QueryStringToHash (query) {
var query_string = {};
var vars = query.split("&");
for (var i=0;i<vars.length;i++) {
var pair = vars[i].split("=");
pair[0] = decodeURIComponent(pair[...
How to run Unix shell script from Java code?
...r pb = new ProcessBuilder("myshellScript.sh", "myArg1", "myArg2");
Map<String, String> env = pb.environment();
env.put("VAR1", "myValue");
env.remove("OTHERVAR");
env.put("VAR2", env.get("VAR1") + "suffix");
pb.directory(new File("myDir"));
Process p = pb.start();
...
When to use nil, blank, empty? [duplicate]
...ct or not
empty? - may be used to check on various object types like empty string "" or empty array []
blank? - checks for nil? or empty?.
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How can I cast int to enum?
...
From an int:
YourEnum foo = (YourEnum)yourInt;
From a string:
YourEnum foo = (YourEnum) Enum.Parse(typeof(YourEnum), yourString);
// The foo.ToString().Contains(",") check is necessary for enumerations marked with an [Flags] attribute
if (!Enum.IsDefined(typeof(YourEnum), foo) ...
Difference between $state.transitionTo() and $state.go() in Angular ui-router
...on: If true will update the url in the location bar, if false will not. If string "replace", will update url and also replace last history record.
inherit: If true will inherit url parameters from current url.
relative (stateObject, default null): When transitioning with relative path (e.g '^'), def...