Tag:field

  • Improve the way to browse notes in Emacs

    Time:2020-4-7

    “Real elisp” series aims to tell my experience of using elisp to customize Emacs, and invite Emacs to give me some advice — if there are many Emacs users, hahaha. Half a year ago, I showed the effect of looking up notes in Emacs – using Emacs request to query keywords in elastic search, displaying […]

  • Using SAP API portal to test the API of SAP successfactors

    Time:2020-4-7

    Log in api.sap.com and find the corresponding API directory according to the keyword successfactors: Find the foundation / platform level API. After entering, Select user management: Click logon to use the control functions provided in the API console: Click try out, and you can use the test function of the API console just like using […]

  • Technology sharing calculation method of MySQL field length limit

    Time:2020-4-6

    Author: KayGood at Oracle, mysql, postgressql and other database fieldsGood at Oracle, MySQL performance optimization, database architecture design, database fault repair, data migration and recoveryKeen to study MySQL database kernel source code, share technical articles, and have Oracle OCP certificationWorked in Jiangsu Guotai Xindian Software Co., Ltd., member of DBA technical team 1、 MySQL restrictions […]

  • Create and manage API in API portal of SAP cloud platform

    Time:2020-4-6

    Log in to the API portal and create a new API: In the API provider field, select the previously created API provider, sapdevelopersystemes5, and click discover to see the list of APIs included in the provider: Here we choose gwsample? Basic, When selected, the URL field will be brought out automatically: After saving, click deploy […]

  • Electron package with optional installation location and automatic update

    Time:2020-4-6

    Electron package parameter adjustment software (Windows version) ———————————-Optional installation location, automatic update, manual update 1: Lead package: electron, electron builder, electron Updater** npm i electron –save-dev npm i electron-builder –save-dev npm i electron-updater –save Note: each package should be placed in the corresponding position; Package.json configuration: 1. Field: “build” Parameters: { “publish”: [ { “provider”: […]

  • Kubernetes pulls image from private image warehouse

    Time:2020-4-6

    When we try to pull the image from the private warehouse, we may receive the following prompt: requested access to the resource is denied Error response from daemon: pull access denied for xxx repository does not exist or may require ‘docker login’: denied: requested access to the resource is denied This is because credentials are […]

  • Google AI leader talks about machine learning trend in 2020: great breakthrough in multitasking and multimodality

    Time:2020-4-5

    Machine learning became a central topic at the neurips conference in Vancouver, Canada, last week. About 13000 researchers from all over the world focused on neuroscience, how to explain neural network output and how artificial intelligence can help solve major problems in the real world. During the meeting, Jeff Dean, the head of Google AI, […]

  • Mongoose Series II update

    Time:2020-4-5

    findOneAndUpdate() Model.findOneAndUpdate(filter, update[, options][, callback]) Parameter 1: filter The query statement is the same as find() filterby{}, update the first data Parameter 2: update {operator: { field: value, … }, … } Must useupdateOperator If there is no operator or the operator is notupdateOperators, unified as$setOperation (unique to mongoose) Update operator Field related operators Symbol […]

  • How to add API key authentication protection function to the API created on SAP API portal

    Time:2020-4-5

    Suppose I develop an API on the sap API portal and don’t want it to be called by anonymous users for free. In other words, only when a consumer has a legal API key can the API be called This requirement can be easily realized through one of the API policies published by the sap […]

  • Mongoose series 3 Create create create document

    Time:2020-4-4

    save() Model.prototype.save([options][, callback]) Document.prototype.save([options][, callback]) The document to save does not contain_idField, insert a new document, similar toinsert()。 The document to save contains_idField, update the document, equivalent toupdate(filter,update,{upsert: true}) The document to save contains_idField (must beObjectIdForm), but_idIf the value of does not exist in the collection, a new document is inserted,_idThe field uses the value […]

  • Design principles of MySQL table index

    Time:2020-4-4

    Index benefits 1. Speed up data retrieval, which is the most important reason to create index; 2. By creating a unique index, we can ensure the uniqueness of each row of data in the database table; 3. Connection between accelerometers and meters; 4. When using grouping and sorting clauses for data retrieval, it can significantly […]

  • The difference of char, vchar and nvarchar

    Time:2020-4-4

    Unicode character set is produced to solve the problem of character set incompatibility. All its characters are represented by two bytes, that is, English characters are also represented by two bytes If you’re still struggling with this, take a look at the explanation and make a decision. In general, if I use Chinese or other […]